CVE-2025-21766
HIGH severity · CVSS 8.1
8.1CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/139512191bd06f1b496117c76372b2ce372c9a41 ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/139512191bd06f1b496117c76372b2ce372c9a41Patch
- https://git.kernel.org/stable/c/4583748b65dee4d61bd50a2214715b4237bc152aPatch
- https://git.kernel.org/stable/c/9b1766d1ff5fe496aabe9fc5f4e34e53f35c11c4Patch
- https://git.kernel.org/stable/c/a39f61d212d822b3062d7f70fa0588e50e55664ePatch
- https://git.kernel.org/stable/c/ce3c6165fce0f06305c806696882a3ad4b90e33fPatch
- https://git.kernel.org/stable/c/ea07480b23225942208f1b754fea1e7ec486d37ePatch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html