CVE-2025-21764

In the Linux kernel, the following vulnerability has been resolved: ndisc: use RCU protection in ndisc_alloc_skb() ndisc_alloc_skb() can be called without RTNL or RCU being held. Add RCU protection to avoid possible 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 19% 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/3c2d705f5adf5d860aaef90cb4211c0fde2ba66d
• https://git.kernel.org/stable/c/628e6d18930bbd21f2d4562228afe27694f66da9
• https://git.kernel.org/stable/c/96fc896d0e5b37c12808df797397fb16f3080879
• https://git.kernel.org/stable/c/9e0ec817eb41a55327a46cd3ce331a9868d60304
• https://git.kernel.org/stable/c/b870256dd2a5648d5ed2f22316b3ac29a7e5ed63

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