{"id":"CVE-2025-21763","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nneighbour: use RCU protection in __neigh_notify()\n\n__neigh_notify() can be called without RTNL or RCU protection.\n\nUse RCU protection to avoid potential UAF.","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nneighbour: use RCU protection in __neigh_notify()\n\n__neigh_notify() can be called without RTNL or RCU protection.\n\nUse RCU protection to avoid potential UAF.","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-416"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 2.6.25, < 5.4.291","linux_kernel >= 5.5, < 5.10.235","linux_kernel >= 5.11, < 5.15.179","linux_kernel >= 5.16, < 6.1.129","linux_kernel >= 6.2, < 6.6.79","linux_kernel >= 6.7, < 6.12.16","linux_kernel >= 6.13, < 6.13.4","linux_kernel = 6.14"],"patched":["linux_kernel 6.13.4"],"published":"2025-02-27","updated":"2026-10-15","sourceUpdated":"2026-10-15T02:17:33.647","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-21763","references":[{"url":"https://git.kernel.org/stable/c/1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/40d8f2f2a373b6c294ffac394d2bb814b572ead1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/559307d25235e24b5424778c7332451b6c741159","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/784eb2376270e086f7db136d154b8404edacf97b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8666e9aab801328c1408a19fbf4070609dc0695a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/becbd5850c03ed33b232083dd66c6e38c0c0e569","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cdd5c2a12ddad8a77ce1838ff9f29aa587de82df","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-784472.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00261,"epssPercentile":0.1773,"ingestedAt":"2026-10-15T03:30:12.794Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2025-02-27T17:57:24.552153Z"},"slug":"CVE-2025-21763","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nneighbour: use RCU protection in __neigh_notify()\n\n__neigh_notify() can be called without RTNL or RCU protection.\n\nUse RCU protection to avoid potential UAF.\n\n## Affected\n\n- `linux_kernel >= 2.6.25, < 5.4.291`\n- `linux_kernel >= 5.5, < 5.10.235`\n- `linux_kernel >= 5.11, < 5.15.179`\n- `linux_kernel >= 5.16, < 6.1.129`\n- `linux_kernel >= 6.2, < 6.6.79`\n- `linux_kernel >= 6.7, < 6.12.16`\n- `linux_kernel >= 6.13, < 6.13.4`\n- `linux_kernel = 6.14`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.13.4`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}