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Critical 9.8Published May 8, 2026
CVE-2026-43384net/tcp-ao: Fix MAC comparison to be constant-time
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: net/tcp-ao: 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
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Aug 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 0a3a809089eb1d4a0a2fd0c16b520d603988c859 before 8be6ed64966da48b6c4726918f106c18742a5125; from 0a3a809089eb1d4a0a2fd0c16b520d603988c859 before a269cbdc442f8658bca35383e34b9d0b0ff95a1c; from 0a3a809089eb1d4a0a2fd0c16b520d603988c859 before 080b0e210088296dd50d6637c06c1db14246adfe; from 0a3a809089eb1d4a0a2fd0c16b520d603988c859 before 67edfec516d30d3e62925c397be4a1e5185802fc | CNA record |
linux linux_kernel linux:linux_kernel | from 6.7 before 6.12.78; from 6.13 before 6.18.19; from 6.19 before 6.19.9; 7.0; 7.0 | NVD |
References
- https://git.kernel.org/stable/c/8be6ed64966da48b6c4726918f106c18742a5125patch
- https://git.kernel.org/stable/c/a269cbdc442f8658bca35383e34b9d0b0ff95a1cpatch
- https://git.kernel.org/stable/c/080b0e210088296dd50d6637c06c1db14246adfepatch
- https://git.kernel.org/stable/c/67edfec516d30d3e62925c397be4a1e5185802fcpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.