CVE-2025-39702
CRITICAL severity · CVSS 9.8 · CWE-203
9.8CVSS CRITICAL
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: Fix MAC comparison to be constant-time To prevent timing attacks, MACs need to be compared in constant time. Use the appropriate helper function for this.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products we track (2)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/3b348c9c8d2ca2c67559ffd0e258ae7e1107d4f0 ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/3b348c9c8d2ca2c67559ffd0e258ae7e1107d4f0Patch
- https://git.kernel.org/stable/c/3ddd55cf19ed6cc62def5e3af10c2a9df1b861c3Patch
- https://git.kernel.org/stable/c/86b6d34717fe0570afce07ee79b8eeb40341f831Patch
- https://git.kernel.org/stable/c/a458b2902115b26a25d67393b12ddd57d1216aaaPatch
- https://git.kernel.org/stable/c/b3967c493799e63f648e9c7b6cb063aa2aed04e7Patch
- https://git.kernel.org/stable/c/f7878d47560d61e3f370aca3cebb8f42a55b990aPatch
- https://git.kernel.org/stable/c/ff55a452d56490047f5233cc48c5d933f8586884Patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlAdvisory