CVE-2025-21763

neighbour: use RCU protection in __neigh_notify()

State: Published
Severity: 7.8 High
Published: Feb 27, 2025
Updated: Oct 15, 2026
Reserved: Dec 29, 2024

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

neighbour: use RCU protection in __neigh_notify()

__neigh_notify() can be called without RTNL or RCU protection.

Use RCU protection to avoid potential UAF.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
LinuxLinux	426b5303eb435d98b9bee37a807be386bc2b3320 to before e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32Affected 426b5303eb435d98b9bee37a807be386bc2b3320 to before 8666e9aab801328c1408a19fbf4070609dc0695aAffected 426b5303eb435d98b9bee37a807be386bc2b3320 to before 40d8f2f2a373b6c294ffac394d2bb814b572ead1Affected 426b5303eb435d98b9bee37a807be386bc2b3320 to before 784eb2376270e086f7db136d154b8404edacf97bAffected 426b5303eb435d98b9bee37a807be386bc2b3320 to before 1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379Affected 426b5303eb435d98b9bee37a807be386bc2b3320 to before cdd5c2a12ddad8a77ce1838ff9f29aa587de82dfAffected 426b5303eb435d98b9bee37a807be386bc2b3320 to before 559307d25235e24b5424778c7332451b6c741159Affected 426b5303eb435d98b9bee37a807be386bc2b3320 to before becbd5850c03ed33b232083dd66c6e38c0c0e569Affected
LinuxLinux	2.6.25Affected before 2.6.25Not affected 5.4.291 through 5.4.Not affected 5.10.235 through 5.10.Not affected 5.15.179 through 5.15.Not affected 6.1.129 through 6.1.Not affected 6.6.79 through 6.6.Not affected 6.12.16 through 6.12.Not affected 6.13.4 through 6.13.*Not affected 6.14 and laterNot affected

Product

Versions

LinuxLinux

426b5303eb435d98b9bee37a807be386bc2b3320 to before e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32Affected
426b5303eb435d98b9bee37a807be386bc2b3320 to before 8666e9aab801328c1408a19fbf4070609dc0695aAffected
426b5303eb435d98b9bee37a807be386bc2b3320 to before 40d8f2f2a373b6c294ffac394d2bb814b572ead1Affected
426b5303eb435d98b9bee37a807be386bc2b3320 to before 784eb2376270e086f7db136d154b8404edacf97bAffected
426b5303eb435d98b9bee37a807be386bc2b3320 to before 1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379Affected
426b5303eb435d98b9bee37a807be386bc2b3320 to before cdd5c2a12ddad8a77ce1838ff9f29aa587de82dfAffected
426b5303eb435d98b9bee37a807be386bc2b3320 to before 559307d25235e24b5424778c7332451b6c741159Affected
426b5303eb435d98b9bee37a807be386bc2b3320 to before becbd5850c03ed33b232083dd66c6e38c0c0e569Affected

LinuxLinux

2.6.25Affected
before 2.6.25Not affected
5.4.291 through 5.4.*Not affected
5.10.235 through 5.10.*Not affected
5.15.179 through 5.15.*Not affected
6.1.129 through 6.1.*Not affected
6.6.79 through 6.6.*Not affected
6.12.16 through 6.12.*Not affected
6.13.4 through 6.13.*Not affected
6.14 and laterNot affected

References

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