Vulnerability-Lookup

FKIE_CVE-2026-64189

Vulnerability from fkie_nvd - Published: 2026-07-20 17:18 - Updated: 2026-10-19 21:17

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: fix race between dump and ip_set_list resize The release path of ip_set_dump_do() and ip_set_dump_done() read inst->ip_set_list via ip_set_ref_netlink(), a plain rcu_dereference_raw() of the array pointer. These run from netlink_recvmsg() without the nfnl mutex and without an RCU read-side critical section. A concurrent ip_set_create() can grow the array: it publishes the new array, calls synchronize_net() and then kvfree()s the old one. Since the dump paths read the array outside any RCU reader, synchronize_net() does not wait for them and the old array can be freed while they still index into it, causing a use-after-free. The dumped set itself stays pinned via set->ref_netlink, so only the array load needs protecting. Take rcu_read_lock() around it, matching ip_set_get_byname() and __ip_set_put_byindex(). BUG: KASAN: slab-use-after-free in ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697) Read of size 8 at addr ffff88800b5c4018 by task exploit/150 Call Trace: ... kasan_report (mm/kasan/report.c:595) ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697) netlink_dump (net/netlink/af_netlink.c:2325) netlink_recvmsg (net/netlink/af_netlink.c:1976) sock_recvmsg (net/socket.c:1159) __sys_recvfrom (net/socket.c:2315) ... Oops: general protection fault, probably for non-canonical address ... KASAN NOPTI KASAN: maybe wild-memory-access in range [0x02d6...d0-0x02d6...d7] RIP: 0010:ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1698) Kernel panic - not syncing: Fatal exception

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1bc67c3fc98e9fc07032cc56afcdbc690c47d11e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7cd9103283b26b917360ec99d7d2f2d761bcf1ab	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/81d54c766337b923eec26da0a13406760b091093	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/96fbafc20ebd9a613736c2998b89c539fe3042f5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a7a299277959683204d73333c32c092fd69327d4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e8a9976b61f1bc4aa7fd25fa26726dfdf2adf710	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e8ee198bbc04a32d336e79160fde980e0235b39f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ff86ea9b7fdf70564e60436fbee68c96bc459943	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	4.20
linux	linux_kernel	4.20
linux	linux_kernel	4.20
linux	linux_kernel	4.20
linux	linux_kernel	4.20
linux	linux_kernel	4.20
linux	linux_kernel	4.20
linux	linux_kernel	7.2

JSON

To clipboard

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ipset: fix race between dump and ip_set_list resize\n\nThe release path of ip_set_dump_do() and ip_set_dump_done() read\ninst-\u003eip_set_list via ip_set_ref_netlink(), a plain rcu_dereference_raw()\nof the array pointer. These run from netlink_recvmsg() without the nfnl\nmutex and without an RCU read-side critical section.\n\nA concurrent ip_set_create() can grow the array: it publishes the new\narray, calls synchronize_net() and then kvfree()s the old one. Since the\ndump paths read the array outside any RCU reader, synchronize_net() does\nnot wait for them and the old array can be freed while they still index\ninto it, causing a use-after-free.\n\nThe dumped set itself stays pinned via set-\u003eref_netlink, so only the\narray load needs protecting. Take rcu_read_lock() around it, matching\nip_set_get_byname() and __ip_set_put_byindex().\n\n  BUG: KASAN: slab-use-after-free in ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697)\n  Read of size 8 at addr ffff88800b5c4018 by task exploit/150\n  Call Trace:\n   ...\n   kasan_report (mm/kasan/report.c:595)\n   ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697)\n   netlink_dump (net/netlink/af_netlink.c:2325)\n   netlink_recvmsg (net/netlink/af_netlink.c:1976)\n   sock_recvmsg (net/socket.c:1159)\n   __sys_recvfrom (net/socket.c:2315)\n   ...\n  Oops: general protection fault, probably for non-canonical address ... KASAN NOPTI\n  KASAN: maybe wild-memory-access in range [0x02d6...d0-0x02d6...d7]\n  RIP: 0010:ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1698)\n  Kernel panic - not syncing: Fatal exception"
    }
  ],
  "id": "CVE-2026-64189",
  "lastModified": "2026-10-19T21:17:26.533",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
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        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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            {
              "technicalImpact": "total"
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          "role": "CISA Coordinator",
          "timestamp": "2026-10-16T15:37:21.088699Z",
          "version": "2.0.3"
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  "published": "2026-07-20T17:18:21.997",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
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          "lang": "en",
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}

CVE-2026-64189 (GCVE-0-2026-64189)

Vulnerability from cvelistv5 – Published: 2026-07-20 16:27 – Updated: 2026-10-19 20:28

Title

netfilter: ipset: fix race between dump and ip_set_list resize

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-16 15:37 UTC

CWE

CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7061 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/a7a29927795968320…
https://git.kernel.org/stable/c/1bc67c3fc98e9fc07…
https://git.kernel.org/stable/c/e8a9976b61f1bc4aa…
https://git.kernel.org/stable/c/96fbafc20ebd9a613…
https://git.kernel.org/stable/c/ff86ea9b7fdf70564…
https://git.kernel.org/stable/c/81d54c766337b923e…
https://git.kernel.org/stable/c/e8ee198bbc04a32d3…
https://git.kernel.org/stable/c/7cd9103283b26b917…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 , < a7a299277959683204d73333c32c092fd69327d4 (git) Affected: 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 , < 1bc67c3fc98e9fc07032cc56afcdbc690c47d11e (git) Affected: 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 , < e8a9976b61f1bc4aa7fd25fa26726dfdf2adf710 (git) Affected: 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 , < 96fbafc20ebd9a613736c2998b89c539fe3042f5 (git) Affected: 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 , < ff86ea9b7fdf70564e60436fbee68c96bc459943 (git) Affected: 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 , < 81d54c766337b923eec26da0a13406760b091093 (git) Affected: 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 , < e8ee198bbc04a32d336e79160fde980e0235b39f (git) Affected: 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 , < 7cd9103283b26b917360ec99d7d2f2d761bcf1ab (git) Affected: 2f6bf7917f55f9dae913193e49672b3598620eab (git) Affected: 4.19.5 , < 4.20 (semver)
Linux	Linux	Affected: 4.20 Unaffected: 0 , < 4.20 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
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        "metrics": [
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            "other": {
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                "id": "CVE-2026-64189",
                "options": [
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                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-16T15:37:21.088699Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-362",
                "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-19T20:28:14.906Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/ipset/ip_set_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a7a299277959683204d73333c32c092fd69327d4",
              "status": "affected",
              "version": "8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7",
              "versionType": "git"
            },
            {
              "lessThan": "1bc67c3fc98e9fc07032cc56afcdbc690c47d11e",
              "status": "affected",
              "version": "8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7",
              "versionType": "git"
            },
            {
              "lessThan": "e8a9976b61f1bc4aa7fd25fa26726dfdf2adf710",
              "status": "affected",
              "version": "8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7",
              "versionType": "git"
            },
            {
              "lessThan": "96fbafc20ebd9a613736c2998b89c539fe3042f5",
              "status": "affected",
              "version": "8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7",
              "versionType": "git"
            },
            {
              "lessThan": "ff86ea9b7fdf70564e60436fbee68c96bc459943",
              "status": "affected",
              "version": "8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7",
              "versionType": "git"
            },
            {
              "lessThan": "81d54c766337b923eec26da0a13406760b091093",
              "status": "affected",
              "version": "8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7",
              "versionType": "git"
            },
            {
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              "status": "affected",
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            },
            {
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              "status": "affected",
              "version": "8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "2f6bf7917f55f9dae913193e49672b3598620eab",
              "versionType": "git"
            },
            {
              "lessThan": "4.20",
              "status": "affected",
              "version": "4.19.5",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/ipset/ip_set_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "4.20"
            },
            {
              "lessThan": "4.20",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.261",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                },
                {
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.96",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.39",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.4",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "7.2",
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                },
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              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ipset: fix race between dump and ip_set_list resize\n\nThe release path of ip_set_dump_do() and ip_set_dump_done() read\ninst-\u003eip_set_list via ip_set_ref_netlink(), a plain rcu_dereference_raw()\nof the array pointer. These run from netlink_recvmsg() without the nfnl\nmutex and without an RCU read-side critical section.\n\nA concurrent ip_set_create() can grow the array: it publishes the new\narray, calls synchronize_net() and then kvfree()s the old one. Since the\ndump paths read the array outside any RCU reader, synchronize_net() does\nnot wait for them and the old array can be freed while they still index\ninto it, causing a use-after-free.\n\nThe dumped set itself stays pinned via set-\u003eref_netlink, so only the\narray load needs protecting. Take rcu_read_lock() around it, matching\nip_set_get_byname() and __ip_set_put_byindex().\n\n  BUG: KASAN: slab-use-after-free in ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697)\n  Read of size 8 at addr ffff88800b5c4018 by task exploit/150\n  Call Trace:\n   ...\n   kasan_report (mm/kasan/report.c:595)\n   ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697)\n   netlink_dump (net/netlink/af_netlink.c:2325)\n   netlink_recvmsg (net/netlink/af_netlink.c:1976)\n   sock_recvmsg (net/socket.c:1159)\n   __sys_recvfrom (net/socket.c:2315)\n   ...\n  Oops: general protection fault, probably for non-canonical address ... KASAN NOPTI\n  KASAN: maybe wild-memory-access in range [0x02d6...d0-0x02d6...d7]\n  RIP: 0010:ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1698)\n  Kernel panic - not syncing: Fatal exception"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable dump and resize paths are reached through local NETLINK_NETFILTER send and receive syscalls, not through remotely received packets.\nAC:L - The attacker controls both sides by issuing an ipset dump and concurrent CREATE requests that grow ip_set_list, and can repeat the race without any victim-controlled condition.\nPR:L - NFNETLINK requires CAP_NET_ADMIN in the network namespace\u0027s owning user namespace, which an unprivileged user can obtain through user and network namespaces on deployments permitting unprivileged user namespaces.\nUI:N - After obtaining local execution, the attacker can trigger both racing operations without any action by another user.\nS:U - Exploitation compromises the kernel of the same host and constitutes standard local privilege escalation rather than crossing a VM, hypervisor, or IOMMU boundary.\nC:H - Reclaiming the freed array can make the loaded struct ip_set pointer attacker-influenced, after which variant-pointer dereferences can enable kernel code execution and arbitrary memory disclosure.\nI:H - The release path performs an indirect uref callback and decrements ref_netlink through the stale pointer, providing control-flow and kernel-memory-write opportunities after heap reclamation.\nA:H - The reported use-after-free produced a general-protection fault and kernel panic, and an attacker can trigger the race repeatedly."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:51:49.683Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a7a299277959683204d73333c32c092fd69327d4"
        },
        {
          "url": "https://git.kernel.org/stable/c/1bc67c3fc98e9fc07032cc56afcdbc690c47d11e"
        },
        {
          "url": "https://git.kernel.org/stable/c/e8a9976b61f1bc4aa7fd25fa26726dfdf2adf710"
        },
        {
          "url": "https://git.kernel.org/stable/c/96fbafc20ebd9a613736c2998b89c539fe3042f5"
        },
        {
          "url": "https://git.kernel.org/stable/c/ff86ea9b7fdf70564e60436fbee68c96bc459943"
        },
        {
          "url": "https://git.kernel.org/stable/c/81d54c766337b923eec26da0a13406760b091093"
        },
        {
          "url": "https://git.kernel.org/stable/c/e8ee198bbc04a32d336e79160fde980e0235b39f"
        },
        {
          "url": "https://git.kernel.org/stable/c/7cd9103283b26b917360ec99d7d2f2d761bcf1ab"
        }
      ],
      "title": "netfilter: ipset: fix race between dump and ip_set_list resize",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64189",
    "datePublished": "2026-07-20T16:27:47.767Z",
    "dateReserved": "2026-07-19T07:54:57.040Z",
    "dateUpdated": "2026-10-19T20:28:14.906Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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