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CVE-2026-80996

UnknownEPSS 0.17%

Last modified

CVE-2026-80996 is a vulnerability of currently unknown severity. In 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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

In 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.

Metrics

EPSS Probability
0.17%

6.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b, < 73761c3cfb6d86392d63335d10f464b9d43275a7; >= 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b, < 7efe1c31e0903a5aa796feb96d3adab574b7ff41; >= 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b, < 0fe037d5eaad938aa3e9143ee071aa237750b42b; >= 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b, < 9c340473f4822bb31b151c19afd17448eda5acd1; >= 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b, < 50c4038f1670bf9a80c6a58ae83d1602decd8481; >= 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b, < af20e269f7459d2ce69887fdf2fad7caf986c865
LinuxLinux4.0

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-80996?
In 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.
How severe is CVE-2026-80996?
Severity scoring for CVE-2026-80996 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-80996?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST