CVE-2024-26645 (GCVE-0-2024-26645)

Vulnerability from cvelistv5 – Published: 2024-03-26 15:17 – Updated: 2026-05-11 20:01
VLAI
Title
tracing: Ensure visibility when inserting an element into tracing_map
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing: Ensure visibility when inserting an element into tracing_map Running the following two commands in parallel on a multi-processor AArch64 machine can sporadically produce an unexpected warning about duplicate histogram entries: $ while true; do echo hist:key=id.syscall:val=hitcount > \ /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/trigger cat /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/hist sleep 0.001 done $ stress-ng --sysbadaddr $(nproc) The warning looks as follows: [ 2911.172474] ------------[ cut here ]------------ [ 2911.173111] Duplicates detected: 1 [ 2911.173574] WARNING: CPU: 2 PID: 12247 at kernel/trace/tracing_map.c:983 tracing_map_sort_entries+0x3e0/0x408 [ 2911.174702] Modules linked in: iscsi_ibft(E) iscsi_boot_sysfs(E) rfkill(E) af_packet(E) nls_iso8859_1(E) nls_cp437(E) vfat(E) fat(E) ena(E) tiny_power_button(E) qemu_fw_cfg(E) button(E) fuse(E) efi_pstore(E) ip_tables(E) x_tables(E) xfs(E) libcrc32c(E) aes_ce_blk(E) aes_ce_cipher(E) crct10dif_ce(E) polyval_ce(E) polyval_generic(E) ghash_ce(E) gf128mul(E) sm4_ce_gcm(E) sm4_ce_ccm(E) sm4_ce(E) sm4_ce_cipher(E) sm4(E) sm3_ce(E) sm3(E) sha3_ce(E) sha512_ce(E) sha512_arm64(E) sha2_ce(E) sha256_arm64(E) nvme(E) sha1_ce(E) nvme_core(E) nvme_auth(E) t10_pi(E) sg(E) scsi_mod(E) scsi_common(E) efivarfs(E) [ 2911.174738] Unloaded tainted modules: cppc_cpufreq(E):1 [ 2911.180985] CPU: 2 PID: 12247 Comm: cat Kdump: loaded Tainted: G E 6.7.0-default #2 1b58bbb22c97e4399dc09f92d309344f69c44a01 [ 2911.182398] Hardware name: Amazon EC2 c7g.8xlarge/, BIOS 1.0 11/1/2018 [ 2911.183208] pstate: 61400005 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) [ 2911.184038] pc : tracing_map_sort_entries+0x3e0/0x408 [ 2911.184667] lr : tracing_map_sort_entries+0x3e0/0x408 [ 2911.185310] sp : ffff8000a1513900 [ 2911.185750] x29: ffff8000a1513900 x28: ffff0003f272fe80 x27: 0000000000000001 [ 2911.186600] x26: ffff0003f272fe80 x25: 0000000000000030 x24: 0000000000000008 [ 2911.187458] x23: ffff0003c5788000 x22: ffff0003c16710c8 x21: ffff80008017f180 [ 2911.188310] x20: ffff80008017f000 x19: ffff80008017f180 x18: ffffffffffffffff [ 2911.189160] x17: 0000000000000000 x16: 0000000000000000 x15: ffff8000a15134b8 [ 2911.190015] x14: 0000000000000000 x13: 205d373432323154 x12: 5b5d313131333731 [ 2911.190844] x11: 00000000fffeffff x10: 00000000fffeffff x9 : ffffd1b78274a13c [ 2911.191716] x8 : 000000000017ffe8 x7 : c0000000fffeffff x6 : 000000000057ffa8 [ 2911.192554] x5 : ffff0012f6c24ec0 x4 : 0000000000000000 x3 : ffff2e5b72b5d000 [ 2911.193404] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0003ff254480 [ 2911.194259] Call trace: [ 2911.194626] tracing_map_sort_entries+0x3e0/0x408 [ 2911.195220] hist_show+0x124/0x800 [ 2911.195692] seq_read_iter+0x1d4/0x4e8 [ 2911.196193] seq_read+0xe8/0x138 [ 2911.196638] vfs_read+0xc8/0x300 [ 2911.197078] ksys_read+0x70/0x108 [ 2911.197534] __arm64_sys_read+0x24/0x38 [ 2911.198046] invoke_syscall+0x78/0x108 [ 2911.198553] el0_svc_common.constprop.0+0xd0/0xf8 [ 2911.199157] do_el0_svc+0x28/0x40 [ 2911.199613] el0_svc+0x40/0x178 [ 2911.200048] el0t_64_sync_handler+0x13c/0x158 [ 2911.200621] el0t_64_sync+0x1a8/0x1b0 [ 2911.201115] ---[ end trace 0000000000000000 ]--- The problem appears to be caused by CPU reordering of writes issued from __tracing_map_insert(). The check for the presence of an element with a given key in this function is: val = READ_ONCE(entry->val); if (val && keys_match(key, val->key, map->key_size)) ... The write of a new entry is: elt = get_free_elt(map); memcpy(elt->key, key, map->key_size); entry->val = elt; The "memcpy(elt->key, key, map->key_size);" and "entry->val = elt;" stores may become visible in the reversed order on another CPU. This second CPU might then incorrectly determine that a new key doesn't match an already present val->key and subse ---truncated---
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c193707dde77ace92a649cd59a17e105e2fbeaef , < 5022b331c041e8c54b9a6a3251579bd1e8c0fc0b (git)
Affected: c193707dde77ace92a649cd59a17e105e2fbeaef , < dad9b28f675ed99b4dec261db2a397efeb80b74c (git)
Affected: c193707dde77ace92a649cd59a17e105e2fbeaef , < ef70dfa0b1e5084f32635156c9a5c795352ad860 (git)
Affected: c193707dde77ace92a649cd59a17e105e2fbeaef , < aef1cb00856ccfd614467cfb50b791278992e177 (git)
Affected: c193707dde77ace92a649cd59a17e105e2fbeaef , < f4f7e696db0274ff560482cc52eddbf0551d4b7a (git)
Affected: c193707dde77ace92a649cd59a17e105e2fbeaef , < a1eebe76e187dbe11ca299f8dbb6e45d5b1889e7 (git)
Affected: c193707dde77ace92a649cd59a17e105e2fbeaef , < bf4aeff7da85c3becd39fb73bac94122331c30fb (git)
Affected: c193707dde77ace92a649cd59a17e105e2fbeaef , < 2b44760609e9eaafc9d234a6883d042fc21132a7 (git)
Create a notification for this product.
Linux Linux Affected: 4.17
Unaffected: 0 , < 4.17 (semver)
Unaffected: 4.19.307 , ≤ 4.19.* (semver)
Unaffected: 5.4.269 , ≤ 5.4.* (semver)
Unaffected: 5.10.210 , ≤ 5.10.* (semver)
Unaffected: 5.15.149 , ≤ 5.15.* (semver)
Unaffected: 6.1.76 , ≤ 6.1.* (semver)
Unaffected: 6.6.15 , ≤ 6.6.* (semver)
Unaffected: 6.7.3 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-26645",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-05-29T14:23:28.207860Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:48:27.214Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T00:07:19.581Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/5022b331c041e8c54b9a6a3251579bd1e8c0fc0b"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/dad9b28f675ed99b4dec261db2a397efeb80b74c"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/ef70dfa0b1e5084f32635156c9a5c795352ad860"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/aef1cb00856ccfd614467cfb50b791278992e177"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/f4f7e696db0274ff560482cc52eddbf0551d4b7a"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/a1eebe76e187dbe11ca299f8dbb6e45d5b1889e7"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/bf4aeff7da85c3becd39fb73bac94122331c30fb"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/2b44760609e9eaafc9d234a6883d042fc21132a7"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/tracing_map.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5022b331c041e8c54b9a6a3251579bd1e8c0fc0b",
              "status": "affected",
              "version": "c193707dde77ace92a649cd59a17e105e2fbeaef",
              "versionType": "git"
            },
            {
              "lessThan": "dad9b28f675ed99b4dec261db2a397efeb80b74c",
              "status": "affected",
              "version": "c193707dde77ace92a649cd59a17e105e2fbeaef",
              "versionType": "git"
            },
            {
              "lessThan": "ef70dfa0b1e5084f32635156c9a5c795352ad860",
              "status": "affected",
              "version": "c193707dde77ace92a649cd59a17e105e2fbeaef",
              "versionType": "git"
            },
            {
              "lessThan": "aef1cb00856ccfd614467cfb50b791278992e177",
              "status": "affected",
              "version": "c193707dde77ace92a649cd59a17e105e2fbeaef",
              "versionType": "git"
            },
            {
              "lessThan": "f4f7e696db0274ff560482cc52eddbf0551d4b7a",
              "status": "affected",
              "version": "c193707dde77ace92a649cd59a17e105e2fbeaef",
              "versionType": "git"
            },
            {
              "lessThan": "a1eebe76e187dbe11ca299f8dbb6e45d5b1889e7",
              "status": "affected",
              "version": "c193707dde77ace92a649cd59a17e105e2fbeaef",
              "versionType": "git"
            },
            {
              "lessThan": "bf4aeff7da85c3becd39fb73bac94122331c30fb",
              "status": "affected",
              "version": "c193707dde77ace92a649cd59a17e105e2fbeaef",
              "versionType": "git"
            },
            {
              "lessThan": "2b44760609e9eaafc9d234a6883d042fc21132a7",
              "status": "affected",
              "version": "c193707dde77ace92a649cd59a17e105e2fbeaef",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/tracing_map.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.17"
            },
            {
              "lessThan": "4.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.307",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.269",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.149",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.76",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.15",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.8",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.307",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.269",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.210",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.149",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.76",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.15",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.7.3",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Ensure visibility when inserting an element into tracing_map\n\nRunning the following two commands in parallel on a multi-processor\nAArch64 machine can sporadically produce an unexpected warning about\nduplicate histogram entries:\n\n $ while true; do\n     echo hist:key=id.syscall:val=hitcount \u003e \\\n       /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/trigger\n     cat /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/hist\n     sleep 0.001\n   done\n $ stress-ng --sysbadaddr $(nproc)\n\nThe warning looks as follows:\n\n[ 2911.172474] ------------[ cut here ]------------\n[ 2911.173111] Duplicates detected: 1\n[ 2911.173574] WARNING: CPU: 2 PID: 12247 at kernel/trace/tracing_map.c:983 tracing_map_sort_entries+0x3e0/0x408\n[ 2911.174702] Modules linked in: iscsi_ibft(E) iscsi_boot_sysfs(E) rfkill(E) af_packet(E) nls_iso8859_1(E) nls_cp437(E) vfat(E) fat(E) ena(E) tiny_power_button(E) qemu_fw_cfg(E) button(E) fuse(E) efi_pstore(E) ip_tables(E) x_tables(E) xfs(E) libcrc32c(E) aes_ce_blk(E) aes_ce_cipher(E) crct10dif_ce(E) polyval_ce(E) polyval_generic(E) ghash_ce(E) gf128mul(E) sm4_ce_gcm(E) sm4_ce_ccm(E) sm4_ce(E) sm4_ce_cipher(E) sm4(E) sm3_ce(E) sm3(E) sha3_ce(E) sha512_ce(E) sha512_arm64(E) sha2_ce(E) sha256_arm64(E) nvme(E) sha1_ce(E) nvme_core(E) nvme_auth(E) t10_pi(E) sg(E) scsi_mod(E) scsi_common(E) efivarfs(E)\n[ 2911.174738] Unloaded tainted modules: cppc_cpufreq(E):1\n[ 2911.180985] CPU: 2 PID: 12247 Comm: cat Kdump: loaded Tainted: G            E      6.7.0-default #2 1b58bbb22c97e4399dc09f92d309344f69c44a01\n[ 2911.182398] Hardware name: Amazon EC2 c7g.8xlarge/, BIOS 1.0 11/1/2018\n[ 2911.183208] pstate: 61400005 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\n[ 2911.184038] pc : tracing_map_sort_entries+0x3e0/0x408\n[ 2911.184667] lr : tracing_map_sort_entries+0x3e0/0x408\n[ 2911.185310] sp : ffff8000a1513900\n[ 2911.185750] x29: ffff8000a1513900 x28: ffff0003f272fe80 x27: 0000000000000001\n[ 2911.186600] x26: ffff0003f272fe80 x25: 0000000000000030 x24: 0000000000000008\n[ 2911.187458] x23: ffff0003c5788000 x22: ffff0003c16710c8 x21: ffff80008017f180\n[ 2911.188310] x20: ffff80008017f000 x19: ffff80008017f180 x18: ffffffffffffffff\n[ 2911.189160] x17: 0000000000000000 x16: 0000000000000000 x15: ffff8000a15134b8\n[ 2911.190015] x14: 0000000000000000 x13: 205d373432323154 x12: 5b5d313131333731\n[ 2911.190844] x11: 00000000fffeffff x10: 00000000fffeffff x9 : ffffd1b78274a13c\n[ 2911.191716] x8 : 000000000017ffe8 x7 : c0000000fffeffff x6 : 000000000057ffa8\n[ 2911.192554] x5 : ffff0012f6c24ec0 x4 : 0000000000000000 x3 : ffff2e5b72b5d000\n[ 2911.193404] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0003ff254480\n[ 2911.194259] Call trace:\n[ 2911.194626]  tracing_map_sort_entries+0x3e0/0x408\n[ 2911.195220]  hist_show+0x124/0x800\n[ 2911.195692]  seq_read_iter+0x1d4/0x4e8\n[ 2911.196193]  seq_read+0xe8/0x138\n[ 2911.196638]  vfs_read+0xc8/0x300\n[ 2911.197078]  ksys_read+0x70/0x108\n[ 2911.197534]  __arm64_sys_read+0x24/0x38\n[ 2911.198046]  invoke_syscall+0x78/0x108\n[ 2911.198553]  el0_svc_common.constprop.0+0xd0/0xf8\n[ 2911.199157]  do_el0_svc+0x28/0x40\n[ 2911.199613]  el0_svc+0x40/0x178\n[ 2911.200048]  el0t_64_sync_handler+0x13c/0x158\n[ 2911.200621]  el0t_64_sync+0x1a8/0x1b0\n[ 2911.201115] ---[ end trace 0000000000000000 ]---\n\nThe problem appears to be caused by CPU reordering of writes issued from\n__tracing_map_insert().\n\nThe check for the presence of an element with a given key in this\nfunction is:\n\n val = READ_ONCE(entry-\u003eval);\n if (val \u0026\u0026 keys_match(key, val-\u003ekey, map-\u003ekey_size)) ...\n\nThe write of a new entry is:\n\n elt = get_free_elt(map);\n memcpy(elt-\u003ekey, key, map-\u003ekey_size);\n entry-\u003eval = elt;\n\nThe \"memcpy(elt-\u003ekey, key, map-\u003ekey_size);\" and \"entry-\u003eval = elt;\"\nstores may become visible in the reversed order on another CPU. This\nsecond CPU might then incorrectly determine that a new key doesn\u0027t match\nan already present val-\u003ekey and subse\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T20:01:24.992Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5022b331c041e8c54b9a6a3251579bd1e8c0fc0b"
        },
        {
          "url": "https://git.kernel.org/stable/c/dad9b28f675ed99b4dec261db2a397efeb80b74c"
        },
        {
          "url": "https://git.kernel.org/stable/c/ef70dfa0b1e5084f32635156c9a5c795352ad860"
        },
        {
          "url": "https://git.kernel.org/stable/c/aef1cb00856ccfd614467cfb50b791278992e177"
        },
        {
          "url": "https://git.kernel.org/stable/c/f4f7e696db0274ff560482cc52eddbf0551d4b7a"
        },
        {
          "url": "https://git.kernel.org/stable/c/a1eebe76e187dbe11ca299f8dbb6e45d5b1889e7"
        },
        {
          "url": "https://git.kernel.org/stable/c/bf4aeff7da85c3becd39fb73bac94122331c30fb"
        },
        {
          "url": "https://git.kernel.org/stable/c/2b44760609e9eaafc9d234a6883d042fc21132a7"
        }
      ],
      "title": "tracing: Ensure visibility when inserting an element into tracing_map",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26645",
    "datePublished": "2024-03-26T15:17:18.203Z",
    "dateReserved": "2024-02-19T14:20:24.138Z",
    "dateUpdated": "2026-05-11T20:01:24.992Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2024-26645",
      "date": "2026-06-12",
      "epss": "7e-05",
      "percentile": "0.00666"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26645\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-26T16:15:12.207\",\"lastModified\":\"2025-03-17T15:20:10.733\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntracing: Ensure visibility when inserting an element into tracing_map\\n\\nRunning the following two commands in parallel on a multi-processor\\nAArch64 machine can sporadically produce an unexpected warning about\\nduplicate histogram entries:\\n\\n $ while true; do\\n     echo hist:key=id.syscall:val=hitcount \u003e \\\\\\n       /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/trigger\\n     cat /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/hist\\n     sleep 0.001\\n   done\\n $ stress-ng --sysbadaddr $(nproc)\\n\\nThe warning looks as follows:\\n\\n[ 2911.172474] ------------[ cut here ]------------\\n[ 2911.173111] Duplicates detected: 1\\n[ 2911.173574] WARNING: CPU: 2 PID: 12247 at kernel/trace/tracing_map.c:983 tracing_map_sort_entries+0x3e0/0x408\\n[ 2911.174702] Modules linked in: iscsi_ibft(E) iscsi_boot_sysfs(E) rfkill(E) af_packet(E) nls_iso8859_1(E) nls_cp437(E) vfat(E) fat(E) ena(E) tiny_power_button(E) qemu_fw_cfg(E) button(E) fuse(E) efi_pstore(E) ip_tables(E) x_tables(E) xfs(E) libcrc32c(E) aes_ce_blk(E) aes_ce_cipher(E) crct10dif_ce(E) polyval_ce(E) polyval_generic(E) ghash_ce(E) gf128mul(E) sm4_ce_gcm(E) sm4_ce_ccm(E) sm4_ce(E) sm4_ce_cipher(E) sm4(E) sm3_ce(E) sm3(E) sha3_ce(E) sha512_ce(E) sha512_arm64(E) sha2_ce(E) sha256_arm64(E) nvme(E) sha1_ce(E) nvme_core(E) nvme_auth(E) t10_pi(E) sg(E) scsi_mod(E) scsi_common(E) efivarfs(E)\\n[ 2911.174738] Unloaded tainted modules: cppc_cpufreq(E):1\\n[ 2911.180985] CPU: 2 PID: 12247 Comm: cat Kdump: loaded Tainted: G            E      6.7.0-default #2 1b58bbb22c97e4399dc09f92d309344f69c44a01\\n[ 2911.182398] Hardware name: Amazon EC2 c7g.8xlarge/, BIOS 1.0 11/1/2018\\n[ 2911.183208] pstate: 61400005 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\\n[ 2911.184038] pc : tracing_map_sort_entries+0x3e0/0x408\\n[ 2911.184667] lr : tracing_map_sort_entries+0x3e0/0x408\\n[ 2911.185310] sp : ffff8000a1513900\\n[ 2911.185750] x29: ffff8000a1513900 x28: ffff0003f272fe80 x27: 0000000000000001\\n[ 2911.186600] x26: ffff0003f272fe80 x25: 0000000000000030 x24: 0000000000000008\\n[ 2911.187458] x23: ffff0003c5788000 x22: ffff0003c16710c8 x21: ffff80008017f180\\n[ 2911.188310] x20: ffff80008017f000 x19: ffff80008017f180 x18: ffffffffffffffff\\n[ 2911.189160] x17: 0000000000000000 x16: 0000000000000000 x15: ffff8000a15134b8\\n[ 2911.190015] x14: 0000000000000000 x13: 205d373432323154 x12: 5b5d313131333731\\n[ 2911.190844] x11: 00000000fffeffff x10: 00000000fffeffff x9 : ffffd1b78274a13c\\n[ 2911.191716] x8 : 000000000017ffe8 x7 : c0000000fffeffff x6 : 000000000057ffa8\\n[ 2911.192554] x5 : ffff0012f6c24ec0 x4 : 0000000000000000 x3 : ffff2e5b72b5d000\\n[ 2911.193404] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0003ff254480\\n[ 2911.194259] Call trace:\\n[ 2911.194626]  tracing_map_sort_entries+0x3e0/0x408\\n[ 2911.195220]  hist_show+0x124/0x800\\n[ 2911.195692]  seq_read_iter+0x1d4/0x4e8\\n[ 2911.196193]  seq_read+0xe8/0x138\\n[ 2911.196638]  vfs_read+0xc8/0x300\\n[ 2911.197078]  ksys_read+0x70/0x108\\n[ 2911.197534]  __arm64_sys_read+0x24/0x38\\n[ 2911.198046]  invoke_syscall+0x78/0x108\\n[ 2911.198553]  el0_svc_common.constprop.0+0xd0/0xf8\\n[ 2911.199157]  do_el0_svc+0x28/0x40\\n[ 2911.199613]  el0_svc+0x40/0x178\\n[ 2911.200048]  el0t_64_sync_handler+0x13c/0x158\\n[ 2911.200621]  el0t_64_sync+0x1a8/0x1b0\\n[ 2911.201115] ---[ end trace 0000000000000000 ]---\\n\\nThe problem appears to be caused by CPU reordering of writes issued from\\n__tracing_map_insert().\\n\\nThe check for the presence of an element with a given key in this\\nfunction is:\\n\\n val = READ_ONCE(entry-\u003eval);\\n if (val \u0026\u0026 keys_match(key, val-\u003ekey, map-\u003ekey_size)) ...\\n\\nThe write of a new entry is:\\n\\n elt = get_free_elt(map);\\n memcpy(elt-\u003ekey, key, map-\u003ekey_size);\\n entry-\u003eval = elt;\\n\\nThe \\\"memcpy(elt-\u003ekey, key, map-\u003ekey_size);\\\" and \\\"entry-\u003eval = elt;\\\"\\nstores may become visible in the reversed order on another CPU. This\\nsecond CPU might then incorrectly determine that a new key doesn\u0027t match\\nan already present val-\u003ekey and subse\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: rastreo: garantiza la visibilidad al insertar un elemento en tracing_map La ejecuci\u00f3n de los siguientes dos comandos en paralelo en una m\u00e1quina multiprocesador AArch64 puede producir espor\u00e1dicamente una advertencia inesperada sobre entradas de histograma duplicadas: $ while true ; hacer echo hist:key=id.syscall:val=hitcount \u0026gt; \\\\ /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/trigger cat /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/hist sleep 0.001 done $ estr\u00e9s-ng --sysbadaddr $(nproc) La advertencia tiene el siguiente aspecto: [ 2911.172474] ------------[ cortar aqu\u00ed ]------------ [ 2911.173111] Duplicados detectados: 1 [2911.173574] ADVERTENCIA: CPU: 2 PID: 12247 en kernel/trace/tracing_map.c:983 tracing_map_sort_entries+0x3e0/0x408 [2911.174702] M\u00f3dulos vinculados en: iscsi_ibft(E) iscsi_boot_sy sfs(E) rfkill(E ) af_packet(E) nls_iso8859_1(E) nls_cp437(E) vfat(E) fat(E) ena(E) tiny_power_button(E) qemu_fw_cfg(E) bot\u00f3n(E) fusible(E) efi_pstore(E) ip_tables(E) x_tables (E) xfs(E) libcrc32c(E) aes_ce_blk(E) aes_ce_cipher(E) crct10dif_ce(E) polyval_ce(E) polyval_generic(E) ghash_ce(E) gf128mul(E) sm4_ce_gcm(E) sm4_ce_ccm(E) sm4_ce(E ) sm4_ce_cipher(E) sm4(E) sm3_ce(E) sm3(E) sha3_ce(E) sha512_ce(E) sha512_arm64(E) sha2_ce(E) sha256_arm64(E) nvme(E) sha1_ce(E) nvme_core(E) nvme_auth (E) t10_pi(E) sg(E) scsi_mod(E) scsi_common(E) efivarfs(E) [ 2911.174738] M\u00f3dulos contaminados descargados: cppc_cpufreq(E):1 [ 2911.180985] CPU: 2 PID: 12247 Comm: cat Kdump: cargado Contaminado: GE 6.7.0-default #2 1b58bbb22c97e4399dc09f92d309344f69c44a01 [2911.182398] Nombre de hardware: Amazon EC2 c7g.8xlarge/, BIOS 1.0 1/11/2018 [2911.183208] pstate: 6140 0005 (nZCv daif +PAN -UAO -TCO +DIT - SSBS BTYPE=--) [ 2911.184038] pc : tracing_map_sort_entries+0x3e0/0x408 [ 2911.184667] lr : tracing_map_sort_entries+0x3e0/0x408 [ 2911.185310] sp : ffff8000a1513900 [ 2911.18 5750] x29: ffff8000a1513900 x28: ffff0003f272fe80 x27: 0000000000000001 [ 2911.186600] x26: ffff0003f272fe80 x25: 0000000000000030 x24: 00000000000000008 [ 2911.187458] x23: ffff0003c5788000 x22: ffff0003c16710c8 x21: ffff80008017f180 [ 2911.1883 10] x20: ffff80008017f000 x19: ffff80008017f180 x18: ffffffffffffffff [ 2911.189160] x17: 0000000000000000 x16: 0000000000000000 x15: ffff8000a151 34b8 [2911.190015] x14: 0000000000000000 x13: 205d373432323154 x12: 5b5d313131333731 [ 2911.190844] x11: 00000000fffeffff x10: 00000000fffeffff x9 : ffffd1b78274a13c [ 2911.191716] x8 : 00 0000000017ffe8 x7: c0000000fffeffff x6: 000000000057ffa8 [2911.192554] x5: ffff0012f6c24ec0 x4: 00000000000000000 x3: ffff2e5b72b5d000 [2911.193 404] x2: 0000000000000000 x1: 0000000000000000 x0 : ffff0003ff254480 [2911.194259] Rastreo de llamadas: [2911.194626] tracing_map_sort_entries+0x3e0/0x408 [2911.195220] hist_show+0x124/0x800 [2911.195692] seq_read_iter+0x1d4 /0x4e8 [ 2911.196193] seq_read+0xe8/0x138 [ 2911.196638] vfs_read+0xc8/0x300 [ 2911.197078 ] ksys_read+0x70/0x108 [ 2911.197534] __arm64_sys_read+0x24/0x38 [ 2911.198046] invoke_syscall+0x78/0x108 [ 2911.198553] el0_svc_common.constprop.0+0xd0/0x f8 [ 2911.199157] do_el0_svc+0x28/0x40 [ 2911.199613] el0_svc+0x40/0x178 [ 2911.200048] el0t_64_sync_handler+0x13c/0x158 [ 2911.200621] el0t_64_sync+0x1a8/0x1b0 [ 2911.201115] ---[ end trace 0000000000000000 ]--- El problema parece deberse a la reordenaci\u00f3n de la CPU de escrituras emitidas desde __tracing_map_insert(). La comprobaci\u00f3n de la presencia de un elemento con una clave determinada en esta funci\u00f3n es: val = READ_ONCE(entry-\u0026gt;val); if (val \u0026amp;\u0026amp; llaves_match(key, val-\u0026gt;key, map-\u0026gt;key_size)) ... La escritura de una nueva entrada es: elt = get_free_elt(map); memcpy(elt-\u0026gt;clave, clave, mapa-\u0026gt;key_size); entrada-\u0026gt;val = elt; El \\\"memcpy(elt-\u0026gt;key, key, map-\u0026gt;key_size);\\\" y \\\"entrada-\u0026gt;val = elt;\\\" Las tiendas pueden volverse visibles en orden inverso en otra CPU.---truncada---\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.17\",\"versionEndExcluding\":\"4.19.307\",\"matchCriteriaId\":\"A818642C-7146-404A-BB47-104AA9A3D9B1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.269\",\"matchCriteriaId\":\"319545F3-D56C-4751-BEBF-0505478BBAE8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.210\",\"matchCriteriaId\":\"F5CB4CA6-A9A0-4AFD-9102-8CF94D708170\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.149\",\"matchCriteriaId\":\"0D0465BB-4053-4E15-9137-6696EBAE90FD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.76\",\"matchCriteriaId\":\"32F0FEB3-5FE1-4400-A56D-886F09BE872E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.7.3\",\"matchCriteriaId\":\"87A6E3AA-41BE-4944-8C69-F09D6A578010\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B9F4EA73-0894-400F-A490-3A397AB7A517\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2b44760609e9eaafc9d234a6883d042fc21132a7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5022b331c041e8c54b9a6a3251579bd1e8c0fc0b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a1eebe76e187dbe11ca299f8dbb6e45d5b1889e7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/aef1cb00856ccfd614467cfb50b791278992e177\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bf4aeff7da85c3becd39fb73bac94122331c30fb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/dad9b28f675ed99b4dec261db2a397efeb80b74c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ef70dfa0b1e5084f32635156c9a5c795352ad860\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f4f7e696db0274ff560482cc52eddbf0551d4b7a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2b44760609e9eaafc9d234a6883d042fc21132a7\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5022b331c041e8c54b9a6a3251579bd1e8c0fc0b\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a1eebe76e187dbe11ca299f8dbb6e45d5b1889e7\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/aef1cb00856ccfd614467cfb50b791278992e177\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bf4aeff7da85c3becd39fb73bac94122331c30fb\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/dad9b28f675ed99b4dec261db2a397efeb80b74c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ef70dfa0b1e5084f32635156c9a5c795352ad860\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f4f7e696db0274ff560482cc52eddbf0551d4b7a\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/5022b331c041e8c54b9a6a3251579bd1e8c0fc0b\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/dad9b28f675ed99b4dec261db2a397efeb80b74c\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/ef70dfa0b1e5084f32635156c9a5c795352ad860\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/aef1cb00856ccfd614467cfb50b791278992e177\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/f4f7e696db0274ff560482cc52eddbf0551d4b7a\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/a1eebe76e187dbe11ca299f8dbb6e45d5b1889e7\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/bf4aeff7da85c3becd39fb73bac94122331c30fb\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/2b44760609e9eaafc9d234a6883d042fc21132a7\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T00:07:19.581Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-26645\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-05-29T14:23:28.207860Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-29T14:23:32.719Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"tracing: Ensure visibility when inserting an element into tracing_map\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"c193707dde77ace92a649cd59a17e105e2fbeaef\", \"lessThan\": \"5022b331c041e8c54b9a6a3251579bd1e8c0fc0b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c193707dde77ace92a649cd59a17e105e2fbeaef\", \"lessThan\": \"dad9b28f675ed99b4dec261db2a397efeb80b74c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c193707dde77ace92a649cd59a17e105e2fbeaef\", \"lessThan\": \"ef70dfa0b1e5084f32635156c9a5c795352ad860\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c193707dde77ace92a649cd59a17e105e2fbeaef\", \"lessThan\": \"aef1cb00856ccfd614467cfb50b791278992e177\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c193707dde77ace92a649cd59a17e105e2fbeaef\", \"lessThan\": \"f4f7e696db0274ff560482cc52eddbf0551d4b7a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c193707dde77ace92a649cd59a17e105e2fbeaef\", \"lessThan\": \"a1eebe76e187dbe11ca299f8dbb6e45d5b1889e7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c193707dde77ace92a649cd59a17e105e2fbeaef\", \"lessThan\": \"bf4aeff7da85c3becd39fb73bac94122331c30fb\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"c193707dde77ace92a649cd59a17e105e2fbeaef\", \"lessThan\": \"2b44760609e9eaafc9d234a6883d042fc21132a7\", \"versionType\": \"git\"}], \"programFiles\": [\"kernel/trace/tracing_map.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.17\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.17\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.307\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.269\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.210\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.149\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.76\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.15\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.7.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"kernel/trace/tracing_map.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/5022b331c041e8c54b9a6a3251579bd1e8c0fc0b\"}, {\"url\": \"https://git.kernel.org/stable/c/dad9b28f675ed99b4dec261db2a397efeb80b74c\"}, {\"url\": \"https://git.kernel.org/stable/c/ef70dfa0b1e5084f32635156c9a5c795352ad860\"}, {\"url\": \"https://git.kernel.org/stable/c/aef1cb00856ccfd614467cfb50b791278992e177\"}, {\"url\": \"https://git.kernel.org/stable/c/f4f7e696db0274ff560482cc52eddbf0551d4b7a\"}, {\"url\": \"https://git.kernel.org/stable/c/a1eebe76e187dbe11ca299f8dbb6e45d5b1889e7\"}, {\"url\": \"https://git.kernel.org/stable/c/bf4aeff7da85c3becd39fb73bac94122331c30fb\"}, {\"url\": \"https://git.kernel.org/stable/c/2b44760609e9eaafc9d234a6883d042fc21132a7\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntracing: Ensure visibility when inserting an element into tracing_map\\n\\nRunning the following two commands in parallel on a multi-processor\\nAArch64 machine can sporadically produce an unexpected warning about\\nduplicate histogram entries:\\n\\n $ while true; do\\n     echo hist:key=id.syscall:val=hitcount \u003e \\\\\\n       /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/trigger\\n     cat /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/hist\\n     sleep 0.001\\n   done\\n $ stress-ng --sysbadaddr $(nproc)\\n\\nThe warning looks as follows:\\n\\n[ 2911.172474] ------------[ cut here ]------------\\n[ 2911.173111] Duplicates detected: 1\\n[ 2911.173574] WARNING: CPU: 2 PID: 12247 at kernel/trace/tracing_map.c:983 tracing_map_sort_entries+0x3e0/0x408\\n[ 2911.174702] Modules linked in: iscsi_ibft(E) iscsi_boot_sysfs(E) rfkill(E) af_packet(E) nls_iso8859_1(E) nls_cp437(E) vfat(E) fat(E) ena(E) tiny_power_button(E) qemu_fw_cfg(E) button(E) fuse(E) efi_pstore(E) ip_tables(E) x_tables(E) xfs(E) libcrc32c(E) aes_ce_blk(E) aes_ce_cipher(E) crct10dif_ce(E) polyval_ce(E) polyval_generic(E) ghash_ce(E) gf128mul(E) sm4_ce_gcm(E) sm4_ce_ccm(E) sm4_ce(E) sm4_ce_cipher(E) sm4(E) sm3_ce(E) sm3(E) sha3_ce(E) sha512_ce(E) sha512_arm64(E) sha2_ce(E) sha256_arm64(E) nvme(E) sha1_ce(E) nvme_core(E) nvme_auth(E) t10_pi(E) sg(E) scsi_mod(E) scsi_common(E) efivarfs(E)\\n[ 2911.174738] Unloaded tainted modules: cppc_cpufreq(E):1\\n[ 2911.180985] CPU: 2 PID: 12247 Comm: cat Kdump: loaded Tainted: G            E      6.7.0-default #2 1b58bbb22c97e4399dc09f92d309344f69c44a01\\n[ 2911.182398] Hardware name: Amazon EC2 c7g.8xlarge/, BIOS 1.0 11/1/2018\\n[ 2911.183208] pstate: 61400005 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\\n[ 2911.184038] pc : tracing_map_sort_entries+0x3e0/0x408\\n[ 2911.184667] lr : tracing_map_sort_entries+0x3e0/0x408\\n[ 2911.185310] sp : ffff8000a1513900\\n[ 2911.185750] x29: ffff8000a1513900 x28: ffff0003f272fe80 x27: 0000000000000001\\n[ 2911.186600] x26: ffff0003f272fe80 x25: 0000000000000030 x24: 0000000000000008\\n[ 2911.187458] x23: ffff0003c5788000 x22: ffff0003c16710c8 x21: ffff80008017f180\\n[ 2911.188310] x20: ffff80008017f000 x19: ffff80008017f180 x18: ffffffffffffffff\\n[ 2911.189160] x17: 0000000000000000 x16: 0000000000000000 x15: ffff8000a15134b8\\n[ 2911.190015] x14: 0000000000000000 x13: 205d373432323154 x12: 5b5d313131333731\\n[ 2911.190844] x11: 00000000fffeffff x10: 00000000fffeffff x9 : ffffd1b78274a13c\\n[ 2911.191716] x8 : 000000000017ffe8 x7 : c0000000fffeffff x6 : 000000000057ffa8\\n[ 2911.192554] x5 : ffff0012f6c24ec0 x4 : 0000000000000000 x3 : ffff2e5b72b5d000\\n[ 2911.193404] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0003ff254480\\n[ 2911.194259] Call trace:\\n[ 2911.194626]  tracing_map_sort_entries+0x3e0/0x408\\n[ 2911.195220]  hist_show+0x124/0x800\\n[ 2911.195692]  seq_read_iter+0x1d4/0x4e8\\n[ 2911.196193]  seq_read+0xe8/0x138\\n[ 2911.196638]  vfs_read+0xc8/0x300\\n[ 2911.197078]  ksys_read+0x70/0x108\\n[ 2911.197534]  __arm64_sys_read+0x24/0x38\\n[ 2911.198046]  invoke_syscall+0x78/0x108\\n[ 2911.198553]  el0_svc_common.constprop.0+0xd0/0xf8\\n[ 2911.199157]  do_el0_svc+0x28/0x40\\n[ 2911.199613]  el0_svc+0x40/0x178\\n[ 2911.200048]  el0t_64_sync_handler+0x13c/0x158\\n[ 2911.200621]  el0t_64_sync+0x1a8/0x1b0\\n[ 2911.201115] ---[ end trace 0000000000000000 ]---\\n\\nThe problem appears to be caused by CPU reordering of writes issued from\\n__tracing_map_insert().\\n\\nThe check for the presence of an element with a given key in this\\nfunction is:\\n\\n val = READ_ONCE(entry-\u003eval);\\n if (val \u0026\u0026 keys_match(key, val-\u003ekey, map-\u003ekey_size)) ...\\n\\nThe write of a new entry is:\\n\\n elt = get_free_elt(map);\\n memcpy(elt-\u003ekey, key, map-\u003ekey_size);\\n entry-\u003eval = elt;\\n\\nThe \\\"memcpy(elt-\u003ekey, key, map-\u003ekey_size);\\\" and \\\"entry-\u003eval = elt;\\\"\\nstores may become visible in the reversed order on another CPU. This\\nsecond CPU might then incorrectly determine that a new key doesn\u0027t match\\nan already present val-\u003ekey and subse\\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.307\", \"versionStartIncluding\": \"4.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.269\", \"versionStartIncluding\": \"4.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.210\", \"versionStartIncluding\": \"4.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.149\", \"versionStartIncluding\": \"4.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.76\", \"versionStartIncluding\": \"4.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.15\", \"versionStartIncluding\": \"4.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.3\", \"versionStartIncluding\": \"4.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"4.17\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:01:24.992Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26645\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:01:24.992Z\", \"dateReserved\": \"2024-02-19T14:20:24.138Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-26T15:17:18.203Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.