CVE-2025-39702
high
CVSS v3
7.0
CVSS v4 NEW
—
VIR risk
7.0
Description
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.
Predictions
Exploit likelihood
69%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| sles | affected | | |
| debian | bookworm | fixed | 6.1.153-1 |
| debian | bullseye | fixed | 5.10.249-1 |
| debian | forky | fixed | 6.16.5-1 |
| debian | sid | fixed | 6.16.5-1 |
| debian | trixie | fixed | 6.12.48-1 |
| linux-kernel | affected | 5.15.190 | |
| linux-kernel | 6.17 | affected | |
| debian | 11.0 | affected | |
| almalinux | 9 | fixed | kernel-64k-debug-devel-5.14.0-570.60.1.el9_6.aarch64.rpm |
References
- https://access.redhat.com/errata/RHSA-2025:19409
- https://access.redhat.com/errata/RHSA-2025:21112
- https://git.kernel.org/stable/c/3b348c9c8d2ca2c67559ffd0e258ae7e1107d4f0
- https://git.kernel.org/stable/c/3ddd55cf19ed6cc62def5e3af10c2a9df1b861c3
- https://git.kernel.org/stable/c/86b6d34717fe0570afce07ee79b8eeb40341f831
- https://git.kernel.org/stable/c/a458b2902115b26a25d67393b12ddd57d1216aaa
- https://git.kernel.org/stable/c/b3967c493799e63f648e9c7b6cb063aa2aed04e7
- https://git.kernel.org/stable/c/f7878d47560d61e3f370aca3cebb8f42a55b990a
- https://git.kernel.org/stable/c/ff55a452d56490047f5233cc48c5d933f8586884
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
- https://www.suse.com/security/cve/CVE-2025-39702.html
- https://security-tracker.debian.org/tracker/CVE-2025-39702
- https://bugzilla.redhat.com/2393533
- https://bugzilla.redhat.com/2396114
- https://bugzilla.redhat.com/2400777
- https://errata.almalinux.org/9/ALSA-2025-19409.html
CWEs
CWE-203
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.