CVE-2025-21763

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.

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.3% chance of exploitation in the next 30 days; higher than 17% of CVEs (scores of 2026-10-25)

CWE

CWE-416

Published

2025-02-27

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379
• https://git.kernel.org/stable/c/40d8f2f2a373b6c294ffac394d2bb814b572ead1
• https://git.kernel.org/stable/c/559307d25235e24b5424778c7332451b6c741159
• https://git.kernel.org/stable/c/784eb2376270e086f7db136d154b8404edacf97b
• https://git.kernel.org/stable/c/8666e9aab801328c1408a19fbf4070609dc0695a

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