net/tcp-ao: Fix MAC comparison to be constant-time

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Summary

CVECVE-2026-43384
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-08 15:16:49 UTC
Updated2026-05-11 08:16:12 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000180000 probability, percentile 0.047390000 (date 2026-05-10)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0a3a809089eb1d4a0a2fd0c16b520d603988c859 8be6ed64966da48b6c4726918f106c18742a5125 git Not specified
CNA Linux Linux affected 0a3a809089eb1d4a0a2fd0c16b520d603988c859 a269cbdc442f8658bca35383e34b9d0b0ff95a1c git Not specified
CNA Linux Linux affected 0a3a809089eb1d4a0a2fd0c16b520d603988c859 080b0e210088296dd50d6637c06c1db14246adfe git Not specified
CNA Linux Linux affected 0a3a809089eb1d4a0a2fd0c16b520d603988c859 67edfec516d30d3e62925c397be4a1e5185802fc git Not specified
CNA Linux Linux affected 6.7 Not specified
CNA Linux Linux unaffected 6.7 semver Not specified
CNA Linux Linux unaffected 6.12.78 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.19 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.9 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/8be6ed64966da48b6c4726918f106c18742a5125 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/080b0e210088296dd50d6637c06c1db14246adfe 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a269cbdc442f8658bca35383e34b9d0b0ff95a1c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/67edfec516d30d3e62925c397be4a1e5185802fc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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