CVE-2026-43383
CRITICAL severity · CVSS 9.4
9.4CVSS CRITICAL
Summary
In the Linux kernel, the following vulnerability has been resolved: net/tcp-md5: 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 impactLow
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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/02669e2a4d207068edce7e8b5fafd85822018ce6 ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/02669e2a4d207068edce7e8b5fafd85822018ce6Patch
- https://git.kernel.org/stable/c/345a9530756528d7ca407663d659c3c40e75c3ddPatch
- https://git.kernel.org/stable/c/46d0d6f50dab706637f4c18a470aac20a21900d3Patch
- https://git.kernel.org/stable/c/5d305a95130a8d08b9545e47f1e18d29d59866cbPatch
- https://git.kernel.org/stable/c/821c8751fdeecdeecabeb11704dd33439c9e4bbcPatch
- https://git.kernel.org/stable/c/ae3831b44f477de048287493e184fc3ff913b624Patch
- https://git.kernel.org/stable/c/b502e97e29d791ff7a8051f29a414535739be218Patch
- https://git.kernel.org/stable/c/ff44ec94d4fc8348600a69de0a8fa1102c23bce8