net: l2tp: do not propagate multicast notification errors

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80996
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:19:06 UTC
Updated2026-09-11 20:19:06 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net: l2tp: do not propagate multicast notification errors The tunnel create, tunnel modify, session create, and session modify netlink handlers send multicast notifications through helpers that can fail while allocating or encoding a message, or while multicasting it. For tunnel and session create/modify, a notification is sent after the live operation has completed. Returning a best-effort notification error as the command result can therefore report failure for an operation that already committed and can cause callers to retry and accumulate live objects. Keep sending notifications for listener visibility, but do not propagate their best-effort status as the command result. This also keeps the tunnel modify command consistent with the other notification-only paths.

Risk And Classification

EPSS: 0.001680000 probability, percentile 0.063560000 (date 2026-09-14)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b 0fe037d5eaad938aa3e9143ee071aa237750b42b git Not specified
CNA Linux Linux affected 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b 9c340473f4822bb31b151c19afd17448eda5acd1 git Not specified
CNA Linux Linux affected 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b 50c4038f1670bf9a80c6a58ae83d1602decd8481 git Not specified
CNA Linux Linux affected 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b af20e269f7459d2ce69887fdf2fad7caf986c865 git Not specified
CNA Linux Linux affected 4.0 Not specified
CNA Linux Linux unaffected 4.0 semver Not specified
CNA Linux Linux unaffected 6.12.109 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/9c340473f4822bb31b151c19afd17448eda5acd1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/af20e269f7459d2ce69887fdf2fad7caf986c865 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/50c4038f1670bf9a80c6a58ae83d1602decd8481 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0fe037d5eaad938aa3e9143ee071aa237750b42b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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