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CVE-2025-40158 ipv6: use RCU in ip6_output()

🗓️ 12 Nov 2025 10:23:29Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 3 Views

CVE-2025-40158: IPv6 ip6_output uses RCU with dst_dev_rcu to prevent UAF; removes rcu_read_lock from ip6_finish_output2.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv6/ip6_output.c"
    ],
    "versions": [
      {
        "version": "4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36",
        "lessThan": "0393f85c3241c19ba8550f04a812e7d19f6b3082",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36",
        "lessThan": "11709573cc4e48dc34c80fc7ab9ce5b159e29695",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv6/ip6_output.c"
    ],
    "versions": [
      {
        "version": "4.13",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.13",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.17.3",
        "lessThanOrEqual": "6.17.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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11 May 2026 21:43Current
EPSS0.00026
3