{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "fdeea7be88b12742bfd50d9e19a06c0d2e702400"
            },
            {
              "fixed": "2c022f582fd16a470df6ed9e7fb7e9fc48946d49"
            },
            {
              "fixed": "4ab6fc60ed5a0344b60711b09bff1dc238d8d6a4"
            },
            {
              "fixed": "468defa0b70902a22f4478c1207624bc1b31c124"
            },
            {
              "fixed": "3db8d078f7f652379ee394132b169d304f6eb4c1"
            },
            {
              "fixed": "8c2b792f04a3db97c9d8d2a45817e93f8884baf5"
            },
            {
              "fixed": "a7a97f2303e63ede105c1d55ef53dc497364e11d"
            },
            {
              "fixed": "d47204c127992da0c976ac9747070a575912e0fe"
            },
            {
              "fixed": "2674d603a9e6970463b2b9ebcf8e31e90beae169"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.12.0"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.141"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.91"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.33"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52925.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvrf: Fix a potential NPD when removing a port from a VRF\n\nRCU readers that identified a net device as a VRF port using\nnetif_is_l3_slave() assume that a subsequent call to\nnetdev_master_upper_dev_get_rcu() will return a VRF device. They then\ncontinue to dereference its l3mdev operations.\n\nThis assumption is not always correct and can result in a NPD [1]. There\nis no RCU synchronization when removing a port from a VRF, so it is\npossible for an RCU reader to see a new master device (e.g., a bridge)\nthat does not have l3mdev operations.\n\nFix by adding RCU synchronization after clearing the IFF_L3MDEV_SLAVE\nflag. Skip this synchronization when a net device is removed from a VRF\nas part of its deletion and when the VRF device itself is deleted. In\nthe latter case an RCU grace period will pass by the time RTNL is\nreleased.\n\n[1]\nBUG: kernel NULL pointer dereference, address: 0000000000000000\n[...]\nRIP: 0010:l3mdev_fib_table_rcu (net/l3mdev/l3mdev.c:181)\n[...]\nCall Trace:\n\u003cTASK\u003e\nl3mdev_fib_table_by_index (net/l3mdev/l3mdev.c:201 net/l3mdev/l3mdev.c:189)\n__inet_bind (net/ipv4/af_inet.c:499 (discriminator 3))\ninet_bind_sk (net/ipv4/af_inet.c:469)\n__sys_bind (./include/linux/file.h:62 (discriminator 1) ./include/linux/file.h:83 (discriminator 1) net/socket.c:1951 (discriminator 1))\n__x64_sys_bind (net/socket.c:1969 (discriminator 1) net/socket.c:1967 (discriminator 1) net/socket.c:1967 (discriminator 1))\ndo_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1))\nentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)",
  "id": "CVE-2026-52925",
  "modified": "2026-07-10T03:54:12.959181668Z",
  "published": "2026-06-24T07:14:19.351Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2674d603a9e6970463b2b9ebcf8e31e90beae169"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2c022f582fd16a470df6ed9e7fb7e9fc48946d49"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3db8d078f7f652379ee394132b169d304f6eb4c1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/468defa0b70902a22f4478c1207624bc1b31c124"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ab6fc60ed5a0344b60711b09bff1dc238d8d6a4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8c2b792f04a3db97c9d8d2a45817e93f8884baf5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a7a97f2303e63ede105c1d55ef53dc497364e11d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d47204c127992da0c976ac9747070a575912e0fe"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52925.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52925"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "vrf: Fix a potential NPD when removing a port from a VRF"
}