VulnerabilityModified
CVE-2026-43383
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.
CRITICAL 9.4EPSS 0.44%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.44%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 9.4 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
- EPSS
- 0.44% probability · 37th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.