CVE-2025-21858 (GCVE-0-2025-21858)

Vulnerability from cvelistv5 – Published: 2025-03-12 09:42 – Updated: 2026-05-12 12:04
VLAI
Title
geneve: Fix use-after-free in geneve_find_dev().
Summary
In the Linux kernel, the following vulnerability has been resolved: geneve: Fix use-after-free in geneve_find_dev(). syzkaller reported a use-after-free in geneve_find_dev() [0] without repro. geneve_configure() links struct geneve_dev.next to net_generic(net, geneve_net_id)->geneve_list. The net here could differ from dev_net(dev) if IFLA_NET_NS_PID, IFLA_NET_NS_FD, or IFLA_TARGET_NETNSID is set. When dev_net(dev) is dismantled, geneve_exit_batch_rtnl() finally calls unregister_netdevice_queue() for each dev in the netns, and later the dev is freed. However, its geneve_dev.next is still linked to the backend UDP socket netns. Then, use-after-free will occur when another geneve dev is created in the netns. Let's call geneve_dellink() instead in geneve_destroy_tunnels(). [0]: BUG: KASAN: slab-use-after-free in geneve_find_dev drivers/net/geneve.c:1295 [inline] BUG: KASAN: slab-use-after-free in geneve_configure+0x234/0x858 drivers/net/geneve.c:1343 Read of size 2 at addr ffff000054d6ee24 by task syz.1.4029/13441 CPU: 1 UID: 0 PID: 13441 Comm: syz.1.4029 Not tainted 6.13.0-g0ad9617c78ac #24 dc35ca22c79fb82e8e7bc5c9c9adafea898b1e3d Hardware name: linux,dummy-virt (DT) Call trace: show_stack+0x38/0x50 arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xbc/0x108 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x16c/0x6f0 mm/kasan/report.c:489 kasan_report+0xc0/0x120 mm/kasan/report.c:602 __asan_report_load2_noabort+0x20/0x30 mm/kasan/report_generic.c:379 geneve_find_dev drivers/net/geneve.c:1295 [inline] geneve_configure+0x234/0x858 drivers/net/geneve.c:1343 geneve_newlink+0xb8/0x128 drivers/net/geneve.c:1634 rtnl_newlink_create+0x23c/0x868 net/core/rtnetlink.c:3795 __rtnl_newlink net/core/rtnetlink.c:3906 [inline] rtnl_newlink+0x1054/0x1630 net/core/rtnetlink.c:4021 rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6911 netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2543 rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6938 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] netlink_unicast+0x618/0x838 net/netlink/af_netlink.c:1348 netlink_sendmsg+0x5fc/0x8b0 net/netlink/af_netlink.c:1892 sock_sendmsg_nosec net/socket.c:713 [inline] __sock_sendmsg net/socket.c:728 [inline] ____sys_sendmsg+0x410/0x6f8 net/socket.c:2568 ___sys_sendmsg+0x178/0x1d8 net/socket.c:2622 __sys_sendmsg net/socket.c:2654 [inline] __do_sys_sendmsg net/socket.c:2659 [inline] __se_sys_sendmsg net/socket.c:2657 [inline] __arm64_sys_sendmsg+0x12c/0x1c8 net/socket.c:2657 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x90/0x278 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x13c/0x250 arch/arm64/kernel/syscall.c:132 do_el0_svc+0x54/0x70 arch/arm64/kernel/syscall.c:151 el0_svc+0x4c/0xa8 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x1a0 arch/arm64/kernel/entry.S:600 Allocated by task 13247: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x30/0x68 mm/kasan/common.c:68 kasan_save_alloc_info+0x44/0x58 mm/kasan/generic.c:568 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x84/0xa0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4298 [inline] __kmalloc_node_noprof+0x2a0/0x560 mm/slub.c:4304 __kvmalloc_node_noprof+0x9c/0x230 mm/util.c:645 alloc_netdev_mqs+0xb8/0x11a0 net/core/dev.c:11470 rtnl_create_link+0x2b8/0xb50 net/core/rtnetlink.c:3604 rtnl_newlink_create+0x19c/0x868 net/core/rtnetlink.c:3780 __rtnl_newlink net/core/rtnetlink.c:3906 [inline] rtnl_newlink+0x1054/0x1630 net/core/rtnetlink.c:4021 rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6911 netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2543 rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6938 netlink_unicast_kernel net/netlink/af_n ---truncated---
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 (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2d07dc79fe04a43d82a346ced6bbf07bdb523f1b , < d5e86e27de0936f3cb0a299ce519d993e9cf3886 (git)
Affected: 2d07dc79fe04a43d82a346ced6bbf07bdb523f1b , < 5a0538ac6826807d6919f6aecbb8996c2865af2c (git)
Affected: 2d07dc79fe04a43d82a346ced6bbf07bdb523f1b , < f74f6560146714241c6e167b03165ee77a86e316 (git)
Affected: 2d07dc79fe04a43d82a346ced6bbf07bdb523f1b , < 904e746b2e7fa952ab8801b303ce826a63153d78 (git)
Affected: 2d07dc79fe04a43d82a346ced6bbf07bdb523f1b , < 3ce92ca990cfac88a87c61df3cc0b5880e688ecf (git)
Affected: 2d07dc79fe04a43d82a346ced6bbf07bdb523f1b , < da9b0ae47f084014b1e4b3f31f70a0defd047ff3 (git)
Affected: 2d07dc79fe04a43d82a346ced6bbf07bdb523f1b , < 788dbca056a8783ec063da3c9d49a3a71c76c283 (git)
Affected: 2d07dc79fe04a43d82a346ced6bbf07bdb523f1b , < 9593172d93b9f91c362baec4643003dc29802929 (git)
Create a notification for this product.
Linux Linux Affected: 4.2
Unaffected: 0 , < 4.2 (semver)
Unaffected: 5.4.291 , ≤ 5.4.* (semver)
Unaffected: 5.10.235 , ≤ 5.10.* (semver)
Unaffected: 5.15.179 , ≤ 5.15.* (semver)
Unaffected: 6.1.130 , ≤ 6.1.* (semver)
Unaffected: 6.6.80 , ≤ 6.6.* (semver)
Unaffected: 6.12.17 , ≤ 6.12.* (semver)
Unaffected: 6.13.5 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-21858",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-03-12T13:19:41.982339Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "CWE-416 Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-03-12T13:23:48.652Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T19:38:13.635Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "affected": [
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-12T12:04:06.094Z",
          "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
          "shortName": "siemens-SADP"
        },
        "references": [
          {
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
          }
        ],
        "x_adpType": "supplier"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/geneve.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d5e86e27de0936f3cb0a299ce519d993e9cf3886",
              "status": "affected",
              "version": "2d07dc79fe04a43d82a346ced6bbf07bdb523f1b",
              "versionType": "git"
            },
            {
              "lessThan": "5a0538ac6826807d6919f6aecbb8996c2865af2c",
              "status": "affected",
              "version": "2d07dc79fe04a43d82a346ced6bbf07bdb523f1b",
              "versionType": "git"
            },
            {
              "lessThan": "f74f6560146714241c6e167b03165ee77a86e316",
              "status": "affected",
              "version": "2d07dc79fe04a43d82a346ced6bbf07bdb523f1b",
              "versionType": "git"
            },
            {
              "lessThan": "904e746b2e7fa952ab8801b303ce826a63153d78",
              "status": "affected",
              "version": "2d07dc79fe04a43d82a346ced6bbf07bdb523f1b",
              "versionType": "git"
            },
            {
              "lessThan": "3ce92ca990cfac88a87c61df3cc0b5880e688ecf",
              "status": "affected",
              "version": "2d07dc79fe04a43d82a346ced6bbf07bdb523f1b",
              "versionType": "git"
            },
            {
              "lessThan": "da9b0ae47f084014b1e4b3f31f70a0defd047ff3",
              "status": "affected",
              "version": "2d07dc79fe04a43d82a346ced6bbf07bdb523f1b",
              "versionType": "git"
            },
            {
              "lessThan": "788dbca056a8783ec063da3c9d49a3a71c76c283",
              "status": "affected",
              "version": "2d07dc79fe04a43d82a346ced6bbf07bdb523f1b",
              "versionType": "git"
            },
            {
              "lessThan": "9593172d93b9f91c362baec4643003dc29802929",
              "status": "affected",
              "version": "2d07dc79fe04a43d82a346ced6bbf07bdb523f1b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/geneve.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.2"
            },
            {
              "lessThan": "4.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.291",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.235",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.179",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.80",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.291",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.235",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.179",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.130",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.80",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.17",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13.5",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngeneve: Fix use-after-free in geneve_find_dev().\n\nsyzkaller reported a use-after-free in geneve_find_dev() [0]\nwithout repro.\n\ngeneve_configure() links struct geneve_dev.next to\nnet_generic(net, geneve_net_id)-\u003egeneve_list.\n\nThe net here could differ from dev_net(dev) if IFLA_NET_NS_PID,\nIFLA_NET_NS_FD, or IFLA_TARGET_NETNSID is set.\n\nWhen dev_net(dev) is dismantled, geneve_exit_batch_rtnl() finally\ncalls unregister_netdevice_queue() for each dev in the netns,\nand later the dev is freed.\n\nHowever, its geneve_dev.next is still linked to the backend UDP\nsocket netns.\n\nThen, use-after-free will occur when another geneve dev is created\nin the netns.\n\nLet\u0027s call geneve_dellink() instead in geneve_destroy_tunnels().\n\n[0]:\nBUG: KASAN: slab-use-after-free in geneve_find_dev drivers/net/geneve.c:1295 [inline]\nBUG: KASAN: slab-use-after-free in geneve_configure+0x234/0x858 drivers/net/geneve.c:1343\nRead of size 2 at addr ffff000054d6ee24 by task syz.1.4029/13441\n\nCPU: 1 UID: 0 PID: 13441 Comm: syz.1.4029 Not tainted 6.13.0-g0ad9617c78ac #24 dc35ca22c79fb82e8e7bc5c9c9adafea898b1e3d\nHardware name: linux,dummy-virt (DT)\nCall trace:\n show_stack+0x38/0x50 arch/arm64/kernel/stacktrace.c:466 (C)\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0xbc/0x108 lib/dump_stack.c:120\n print_address_description mm/kasan/report.c:378 [inline]\n print_report+0x16c/0x6f0 mm/kasan/report.c:489\n kasan_report+0xc0/0x120 mm/kasan/report.c:602\n __asan_report_load2_noabort+0x20/0x30 mm/kasan/report_generic.c:379\n geneve_find_dev drivers/net/geneve.c:1295 [inline]\n geneve_configure+0x234/0x858 drivers/net/geneve.c:1343\n geneve_newlink+0xb8/0x128 drivers/net/geneve.c:1634\n rtnl_newlink_create+0x23c/0x868 net/core/rtnetlink.c:3795\n __rtnl_newlink net/core/rtnetlink.c:3906 [inline]\n rtnl_newlink+0x1054/0x1630 net/core/rtnetlink.c:4021\n rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6911\n netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2543\n rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6938\n netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]\n netlink_unicast+0x618/0x838 net/netlink/af_netlink.c:1348\n netlink_sendmsg+0x5fc/0x8b0 net/netlink/af_netlink.c:1892\n sock_sendmsg_nosec net/socket.c:713 [inline]\n __sock_sendmsg net/socket.c:728 [inline]\n ____sys_sendmsg+0x410/0x6f8 net/socket.c:2568\n ___sys_sendmsg+0x178/0x1d8 net/socket.c:2622\n __sys_sendmsg net/socket.c:2654 [inline]\n __do_sys_sendmsg net/socket.c:2659 [inline]\n __se_sys_sendmsg net/socket.c:2657 [inline]\n __arm64_sys_sendmsg+0x12c/0x1c8 net/socket.c:2657\n __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]\n invoke_syscall+0x90/0x278 arch/arm64/kernel/syscall.c:49\n el0_svc_common+0x13c/0x250 arch/arm64/kernel/syscall.c:132\n do_el0_svc+0x54/0x70 arch/arm64/kernel/syscall.c:151\n el0_svc+0x4c/0xa8 arch/arm64/kernel/entry-common.c:744\n el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762\n el0t_64_sync+0x198/0x1a0 arch/arm64/kernel/entry.S:600\n\nAllocated by task 13247:\n kasan_save_stack mm/kasan/common.c:47 [inline]\n kasan_save_track+0x30/0x68 mm/kasan/common.c:68\n kasan_save_alloc_info+0x44/0x58 mm/kasan/generic.c:568\n poison_kmalloc_redzone mm/kasan/common.c:377 [inline]\n __kasan_kmalloc+0x84/0xa0 mm/kasan/common.c:394\n kasan_kmalloc include/linux/kasan.h:260 [inline]\n __do_kmalloc_node mm/slub.c:4298 [inline]\n __kmalloc_node_noprof+0x2a0/0x560 mm/slub.c:4304\n __kvmalloc_node_noprof+0x9c/0x230 mm/util.c:645\n alloc_netdev_mqs+0xb8/0x11a0 net/core/dev.c:11470\n rtnl_create_link+0x2b8/0xb50 net/core/rtnetlink.c:3604\n rtnl_newlink_create+0x19c/0x868 net/core/rtnetlink.c:3780\n __rtnl_newlink net/core/rtnetlink.c:3906 [inline]\n rtnl_newlink+0x1054/0x1630 net/core/rtnetlink.c:4021\n rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6911\n netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2543\n rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6938\n netlink_unicast_kernel net/netlink/af_n\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:07:52.222Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d5e86e27de0936f3cb0a299ce519d993e9cf3886"
        },
        {
          "url": "https://git.kernel.org/stable/c/5a0538ac6826807d6919f6aecbb8996c2865af2c"
        },
        {
          "url": "https://git.kernel.org/stable/c/f74f6560146714241c6e167b03165ee77a86e316"
        },
        {
          "url": "https://git.kernel.org/stable/c/904e746b2e7fa952ab8801b303ce826a63153d78"
        },
        {
          "url": "https://git.kernel.org/stable/c/3ce92ca990cfac88a87c61df3cc0b5880e688ecf"
        },
        {
          "url": "https://git.kernel.org/stable/c/da9b0ae47f084014b1e4b3f31f70a0defd047ff3"
        },
        {
          "url": "https://git.kernel.org/stable/c/788dbca056a8783ec063da3c9d49a3a71c76c283"
        },
        {
          "url": "https://git.kernel.org/stable/c/9593172d93b9f91c362baec4643003dc29802929"
        }
      ],
      "title": "geneve: Fix use-after-free in geneve_find_dev().",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21858",
    "datePublished": "2025-03-12T09:42:11.343Z",
    "dateReserved": "2024-12-29T08:45:45.780Z",
    "dateUpdated": "2026-05-12T12:04:06.094Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-21858",
      "date": "2026-06-25",
      "epss": "0.00224",
      "percentile": "0.12873"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-21858\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-03-12T10:15:18.720\",\"lastModified\":\"2026-05-12T13:16:38.593\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ngeneve: Fix use-after-free in geneve_find_dev().\\n\\nsyzkaller reported a use-after-free in geneve_find_dev() [0]\\nwithout repro.\\n\\ngeneve_configure() links struct geneve_dev.next to\\nnet_generic(net, geneve_net_id)-\u003egeneve_list.\\n\\nThe net here could differ from dev_net(dev) if IFLA_NET_NS_PID,\\nIFLA_NET_NS_FD, or IFLA_TARGET_NETNSID is set.\\n\\nWhen dev_net(dev) is dismantled, geneve_exit_batch_rtnl() finally\\ncalls unregister_netdevice_queue() for each dev in the netns,\\nand later the dev is freed.\\n\\nHowever, its geneve_dev.next is still linked to the backend UDP\\nsocket netns.\\n\\nThen, use-after-free will occur when another geneve dev is created\\nin the netns.\\n\\nLet\u0027s call geneve_dellink() instead in geneve_destroy_tunnels().\\n\\n[0]:\\nBUG: KASAN: slab-use-after-free in geneve_find_dev drivers/net/geneve.c:1295 [inline]\\nBUG: KASAN: slab-use-after-free in geneve_configure+0x234/0x858 drivers/net/geneve.c:1343\\nRead of size 2 at addr ffff000054d6ee24 by task syz.1.4029/13441\\n\\nCPU: 1 UID: 0 PID: 13441 Comm: syz.1.4029 Not tainted 6.13.0-g0ad9617c78ac #24 dc35ca22c79fb82e8e7bc5c9c9adafea898b1e3d\\nHardware name: linux,dummy-virt (DT)\\nCall trace:\\n show_stack+0x38/0x50 arch/arm64/kernel/stacktrace.c:466 (C)\\n __dump_stack lib/dump_stack.c:94 [inline]\\n dump_stack_lvl+0xbc/0x108 lib/dump_stack.c:120\\n print_address_description mm/kasan/report.c:378 [inline]\\n print_report+0x16c/0x6f0 mm/kasan/report.c:489\\n kasan_report+0xc0/0x120 mm/kasan/report.c:602\\n __asan_report_load2_noabort+0x20/0x30 mm/kasan/report_generic.c:379\\n geneve_find_dev drivers/net/geneve.c:1295 [inline]\\n geneve_configure+0x234/0x858 drivers/net/geneve.c:1343\\n geneve_newlink+0xb8/0x128 drivers/net/geneve.c:1634\\n rtnl_newlink_create+0x23c/0x868 net/core/rtnetlink.c:3795\\n __rtnl_newlink net/core/rtnetlink.c:3906 [inline]\\n rtnl_newlink+0x1054/0x1630 net/core/rtnetlink.c:4021\\n rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6911\\n netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2543\\n rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6938\\n netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]\\n netlink_unicast+0x618/0x838 net/netlink/af_netlink.c:1348\\n netlink_sendmsg+0x5fc/0x8b0 net/netlink/af_netlink.c:1892\\n sock_sendmsg_nosec net/socket.c:713 [inline]\\n __sock_sendmsg net/socket.c:728 [inline]\\n ____sys_sendmsg+0x410/0x6f8 net/socket.c:2568\\n ___sys_sendmsg+0x178/0x1d8 net/socket.c:2622\\n __sys_sendmsg net/socket.c:2654 [inline]\\n __do_sys_sendmsg net/socket.c:2659 [inline]\\n __se_sys_sendmsg net/socket.c:2657 [inline]\\n __arm64_sys_sendmsg+0x12c/0x1c8 net/socket.c:2657\\n __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]\\n invoke_syscall+0x90/0x278 arch/arm64/kernel/syscall.c:49\\n el0_svc_common+0x13c/0x250 arch/arm64/kernel/syscall.c:132\\n do_el0_svc+0x54/0x70 arch/arm64/kernel/syscall.c:151\\n el0_svc+0x4c/0xa8 arch/arm64/kernel/entry-common.c:744\\n el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762\\n el0t_64_sync+0x198/0x1a0 arch/arm64/kernel/entry.S:600\\n\\nAllocated by task 13247:\\n kasan_save_stack mm/kasan/common.c:47 [inline]\\n kasan_save_track+0x30/0x68 mm/kasan/common.c:68\\n kasan_save_alloc_info+0x44/0x58 mm/kasan/generic.c:568\\n poison_kmalloc_redzone mm/kasan/common.c:377 [inline]\\n __kasan_kmalloc+0x84/0xa0 mm/kasan/common.c:394\\n kasan_kmalloc include/linux/kasan.h:260 [inline]\\n __do_kmalloc_node mm/slub.c:4298 [inline]\\n __kmalloc_node_noprof+0x2a0/0x560 mm/slub.c:4304\\n __kvmalloc_node_noprof+0x9c/0x230 mm/util.c:645\\n alloc_netdev_mqs+0xb8/0x11a0 net/core/dev.c:11470\\n rtnl_create_link+0x2b8/0xb50 net/core/rtnetlink.c:3604\\n rtnl_newlink_create+0x19c/0x868 net/core/rtnetlink.c:3780\\n __rtnl_newlink net/core/rtnetlink.c:3906 [inline]\\n rtnl_newlink+0x1054/0x1630 net/core/rtnetlink.c:4021\\n rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6911\\n netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2543\\n rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6938\\n netlink_unicast_kernel net/netlink/af_n\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: geneve: Se corrige el problema de uso despu\u00e9s de la liberaci\u00f3n en geneve_find_dev(). syzkaller report\u00f3 un problema de uso despu\u00e9s de la liberaci\u00f3n en geneve_find_dev() [0] sin reproducci\u00f3n. geneve_configure() vincula la estructura geneve_dev.next con net_generic(net, geneve_net_id)-\u0026gt;geneve_list. La red aqu\u00ed podr\u00eda diferir de dev_net(dev) si se configura IFLA_NET_NS_PID, IFLA_NET_NS_FD o IFLA_TARGET_NETNSID. Al desmantelar dev_net(dev), geneve_exit_batch_rtnl() finalmente llama a unregister_netdevice_queue() para cada dispositivo en la red, y posteriormente se libera el dispositivo. Sin embargo, su geneve_dev.next a\u00fan est\u00e1 vinculado a la red del socket UDP del backend. Entonces, se producir\u00e1 un \\\"use-after-free\\\" al crear otro \\\"geneve dev\\\" en la red. En su lugar, llamaremos a \\\"geneve_dellink()\\\" en \\\"geneve_destroy_tunnels()\\\". [0]: ERROR: KASAN: slab-use-after-free in geneve_find_dev drivers/net/geneve.c:1295 [inline] BUG: KASAN: slab-use-after-free in geneve_configure+0x234/0x858 drivers/net/geneve.c:1343 Read of size 2 at addr ffff000054d6ee24 by task syz.1.4029/13441 CPU: 1 UID: 0 PID: 13441 Comm: syz.1.4029 Not tainted 6.13.0-g0ad9617c78ac #24 dc35ca22c79fb82e8e7bc5c9c9adafea898b1e3d Hardware name: linux,dummy-virt (DT) Call trace: show_stack+0x38/0x50 arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xbc/0x108 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x16c/0x6f0 mm/kasan/report.c:489 kasan_report+0xc0/0x120 mm/kasan/report.c:602 __asan_report_load2_noabort+0x20/0x30 mm/kasan/report_generic.c:379 geneve_find_dev drivers/net/geneve.c:1295 [inline] geneve_configure+0x234/0x858 drivers/net/geneve.c:1343 geneve_newlink+0xb8/0x128 drivers/net/geneve.c:1634 rtnl_newlink_create+0x23c/0x868 net/core/rtnetlink.c:3795 __rtnl_newlink net/core/rtnetlink.c:3906 [inline] rtnl_newlink+0x1054/0x1630 net/core/rtnetlink.c:4021 rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6911 netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2543 rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6938 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] netlink_unicast+0x618/0x838 net/netlink/af_netlink.c:1348 netlink_sendmsg+0x5fc/0x8b0 net/netlink/af_netlink.c:1892 sock_sendmsg_nosec net/socket.c:713 [inline] __sock_sendmsg net/socket.c:728 [inline] ____sys_sendmsg+0x410/0x6f8 net/socket.c:2568 ___sys_sendmsg+0x178/0x1d8 net/socket.c:2622 __sys_sendmsg net/socket.c:2654 [inline] __do_sys_sendmsg net/socket.c:2659 [inline] __se_sys_sendmsg net/socket.c:2657 [inline] __arm64_sys_sendmsg+0x12c/0x1c8 net/socket.c:2657 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x90/0x278 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x13c/0x250 arch/arm64/kernel/syscall.c:132 do_el0_svc+0x54/0x70 arch/arm64/kernel/syscall.c:151 el0_svc+0x4c/0xa8 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x1a0 arch/arm64/kernel/entry.S:600 Allocated by task 13247: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x30/0x68 mm/kasan/common.c:68 kasan_save_alloc_info+0x44/0x58 mm/kasan/generic.c:568 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x84/0xa0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4298 [inline] __kmalloc_node_noprof+0x2a0/0x560 mm/slub.c:4304 __kvmalloc_node_noprof+0x9c/0x230 mm/util.c:645 alloc_netdev_mqs+0xb8/0x11a0 net/core/dev.c:11470 rtnl_create_link+0x2b8/0xb50 net/core/rtnetlink.c:3604 rtnl_newlink_create+0x19c/0x868 net/core/rtnetlink.c:3780 __rtnl_newlink net/core/rtnetlink.c:3906 [inline] rtnl_newlink+0x1054/0x1630 net/core/rtnetlink.c:4021 rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6911 netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2543 rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6938 netlink_unicast_kernel net/netlink/af_n ---truncado---\"}],\"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:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.2\",\"versionEndExcluding\":\"6.1.130\",\"matchCriteriaId\":\"9C9D8D6E-6649-4F6E-B9CC-7E4E4750FA2F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.80\",\"matchCriteriaId\":\"A93F3655-6FAF-43B0-8541-A212998F05B8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.17\",\"matchCriteriaId\":\"15370AEE-6D1C-49C3-8CB7-E889D5F92B6F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.13.5\",\"matchCriteriaId\":\"72E69ABB-9015-43A6-87E1-5150383CFFD9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"186716B6-2B66-4BD0-852E-D48E71C0C85F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"0D3E781C-403A-498F-9DA9-ECEE50F41E75\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"66619FB8-0AAF-4166-B2CF-67B24143261D\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3ce92ca990cfac88a87c61df3cc0b5880e688ecf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5a0538ac6826807d6919f6aecbb8996c2865af2c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/788dbca056a8783ec063da3c9d49a3a71c76c283\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/904e746b2e7fa952ab8801b303ce826a63153d78\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9593172d93b9f91c362baec4643003dc29802929\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d5e86e27de0936f3cb0a299ce519d993e9cf3886\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/da9b0ae47f084014b1e4b3f31f70a0defd047ff3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f74f6560146714241c6e167b03165ee77a86e316\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-265688.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T19:38:13.635Z\"}}, {\"affected\": [{\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}], \"x_adpType\": \"supplier\", \"references\": [{\"url\": \"https://cert-portal.siemens.com/productcert/html/ssa-265688.html\"}], \"providerMetadata\": {\"orgId\": \"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\", \"shortName\": \"siemens-SADP\", \"dateUpdated\": \"2026-05-12T12:04:06.094Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-21858\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-03-12T13:19:41.982339Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-03-12T13:19:15.451Z\"}}], \"cna\": {\"title\": \"geneve: Fix use-after-free in geneve_find_dev().\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2d07dc79fe04a43d82a346ced6bbf07bdb523f1b\", \"lessThan\": \"d5e86e27de0936f3cb0a299ce519d993e9cf3886\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2d07dc79fe04a43d82a346ced6bbf07bdb523f1b\", \"lessThan\": \"5a0538ac6826807d6919f6aecbb8996c2865af2c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2d07dc79fe04a43d82a346ced6bbf07bdb523f1b\", \"lessThan\": \"f74f6560146714241c6e167b03165ee77a86e316\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2d07dc79fe04a43d82a346ced6bbf07bdb523f1b\", \"lessThan\": \"904e746b2e7fa952ab8801b303ce826a63153d78\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2d07dc79fe04a43d82a346ced6bbf07bdb523f1b\", \"lessThan\": \"3ce92ca990cfac88a87c61df3cc0b5880e688ecf\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2d07dc79fe04a43d82a346ced6bbf07bdb523f1b\", \"lessThan\": \"da9b0ae47f084014b1e4b3f31f70a0defd047ff3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2d07dc79fe04a43d82a346ced6bbf07bdb523f1b\", \"lessThan\": \"788dbca056a8783ec063da3c9d49a3a71c76c283\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2d07dc79fe04a43d82a346ced6bbf07bdb523f1b\", \"lessThan\": \"9593172d93b9f91c362baec4643003dc29802929\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/geneve.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.2\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.2\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.291\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.235\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.179\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.130\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.80\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.17\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.13.*\"}, {\"status\": \"unaffected\", \"version\": \"6.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/geneve.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/d5e86e27de0936f3cb0a299ce519d993e9cf3886\"}, {\"url\": \"https://git.kernel.org/stable/c/5a0538ac6826807d6919f6aecbb8996c2865af2c\"}, {\"url\": \"https://git.kernel.org/stable/c/f74f6560146714241c6e167b03165ee77a86e316\"}, {\"url\": \"https://git.kernel.org/stable/c/904e746b2e7fa952ab8801b303ce826a63153d78\"}, {\"url\": \"https://git.kernel.org/stable/c/3ce92ca990cfac88a87c61df3cc0b5880e688ecf\"}, {\"url\": \"https://git.kernel.org/stable/c/da9b0ae47f084014b1e4b3f31f70a0defd047ff3\"}, {\"url\": \"https://git.kernel.org/stable/c/788dbca056a8783ec063da3c9d49a3a71c76c283\"}, {\"url\": \"https://git.kernel.org/stable/c/9593172d93b9f91c362baec4643003dc29802929\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ngeneve: Fix use-after-free in geneve_find_dev().\\n\\nsyzkaller reported a use-after-free in geneve_find_dev() [0]\\nwithout repro.\\n\\ngeneve_configure() links struct geneve_dev.next to\\nnet_generic(net, geneve_net_id)-\u003egeneve_list.\\n\\nThe net here could differ from dev_net(dev) if IFLA_NET_NS_PID,\\nIFLA_NET_NS_FD, or IFLA_TARGET_NETNSID is set.\\n\\nWhen dev_net(dev) is dismantled, geneve_exit_batch_rtnl() finally\\ncalls unregister_netdevice_queue() for each dev in the netns,\\nand later the dev is freed.\\n\\nHowever, its geneve_dev.next is still linked to the backend UDP\\nsocket netns.\\n\\nThen, use-after-free will occur when another geneve dev is created\\nin the netns.\\n\\nLet\u0027s call geneve_dellink() instead in geneve_destroy_tunnels().\\n\\n[0]:\\nBUG: KASAN: slab-use-after-free in geneve_find_dev drivers/net/geneve.c:1295 [inline]\\nBUG: KASAN: slab-use-after-free in geneve_configure+0x234/0x858 drivers/net/geneve.c:1343\\nRead of size 2 at addr ffff000054d6ee24 by task syz.1.4029/13441\\n\\nCPU: 1 UID: 0 PID: 13441 Comm: syz.1.4029 Not tainted 6.13.0-g0ad9617c78ac #24 dc35ca22c79fb82e8e7bc5c9c9adafea898b1e3d\\nHardware name: linux,dummy-virt (DT)\\nCall trace:\\n show_stack+0x38/0x50 arch/arm64/kernel/stacktrace.c:466 (C)\\n __dump_stack lib/dump_stack.c:94 [inline]\\n dump_stack_lvl+0xbc/0x108 lib/dump_stack.c:120\\n print_address_description mm/kasan/report.c:378 [inline]\\n print_report+0x16c/0x6f0 mm/kasan/report.c:489\\n kasan_report+0xc0/0x120 mm/kasan/report.c:602\\n __asan_report_load2_noabort+0x20/0x30 mm/kasan/report_generic.c:379\\n geneve_find_dev drivers/net/geneve.c:1295 [inline]\\n geneve_configure+0x234/0x858 drivers/net/geneve.c:1343\\n geneve_newlink+0xb8/0x128 drivers/net/geneve.c:1634\\n rtnl_newlink_create+0x23c/0x868 net/core/rtnetlink.c:3795\\n __rtnl_newlink net/core/rtnetlink.c:3906 [inline]\\n rtnl_newlink+0x1054/0x1630 net/core/rtnetlink.c:4021\\n rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6911\\n netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2543\\n rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6938\\n netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]\\n netlink_unicast+0x618/0x838 net/netlink/af_netlink.c:1348\\n netlink_sendmsg+0x5fc/0x8b0 net/netlink/af_netlink.c:1892\\n sock_sendmsg_nosec net/socket.c:713 [inline]\\n __sock_sendmsg net/socket.c:728 [inline]\\n ____sys_sendmsg+0x410/0x6f8 net/socket.c:2568\\n ___sys_sendmsg+0x178/0x1d8 net/socket.c:2622\\n __sys_sendmsg net/socket.c:2654 [inline]\\n __do_sys_sendmsg net/socket.c:2659 [inline]\\n __se_sys_sendmsg net/socket.c:2657 [inline]\\n __arm64_sys_sendmsg+0x12c/0x1c8 net/socket.c:2657\\n __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]\\n invoke_syscall+0x90/0x278 arch/arm64/kernel/syscall.c:49\\n el0_svc_common+0x13c/0x250 arch/arm64/kernel/syscall.c:132\\n do_el0_svc+0x54/0x70 arch/arm64/kernel/syscall.c:151\\n el0_svc+0x4c/0xa8 arch/arm64/kernel/entry-common.c:744\\n el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762\\n el0t_64_sync+0x198/0x1a0 arch/arm64/kernel/entry.S:600\\n\\nAllocated by task 13247:\\n kasan_save_stack mm/kasan/common.c:47 [inline]\\n kasan_save_track+0x30/0x68 mm/kasan/common.c:68\\n kasan_save_alloc_info+0x44/0x58 mm/kasan/generic.c:568\\n poison_kmalloc_redzone mm/kasan/common.c:377 [inline]\\n __kasan_kmalloc+0x84/0xa0 mm/kasan/common.c:394\\n kasan_kmalloc include/linux/kasan.h:260 [inline]\\n __do_kmalloc_node mm/slub.c:4298 [inline]\\n __kmalloc_node_noprof+0x2a0/0x560 mm/slub.c:4304\\n __kvmalloc_node_noprof+0x9c/0x230 mm/util.c:645\\n alloc_netdev_mqs+0xb8/0x11a0 net/core/dev.c:11470\\n rtnl_create_link+0x2b8/0xb50 net/core/rtnetlink.c:3604\\n rtnl_newlink_create+0x19c/0x868 net/core/rtnetlink.c:3780\\n __rtnl_newlink net/core/rtnetlink.c:3906 [inline]\\n rtnl_newlink+0x1054/0x1630 net/core/rtnetlink.c:4021\\n rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6911\\n netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2543\\n rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6938\\n netlink_unicast_kernel net/netlink/af_n\\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.291\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.235\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.179\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.130\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.80\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.17\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13.5\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.14\", \"versionStartIncluding\": \"4.2\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T21:07:52.222Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-21858\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-12T12:04:06.094Z\", \"dateReserved\": \"2024-12-29T08:45:45.780Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-03-12T09:42:11.343Z\", \"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.