CVE-2025-21766

In the Linux kernel, the following vulnerability has been resolved: ipv4: use RCU protection in __ip_rt_update_pmtu() __ip_rt_update_pmtu() must use RCU protection to make sure the net structure it reads does not disappear.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.6% chance of exploitation in the next 30 days; higher than 46% of CVEs (scores of 2026-10-25)

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/139512191bd06f1b496117c76372b2ce372c9a41
• https://git.kernel.org/stable/c/4583748b65dee4d61bd50a2214715b4237bc152a
• https://git.kernel.org/stable/c/9b1766d1ff5fe496aabe9fc5f4e34e53f35c11c4
• https://git.kernel.org/stable/c/a39f61d212d822b3062d7f70fa0588e50e55664e
• https://git.kernel.org/stable/c/ce3c6165fce0f06305c806696882a3ad4b90e33f

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