CVE-2026-80996Medium· 5.5▾ SunlitIn 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 notifica…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
— → 4.4
none → medium
— → 4.4
none → medium
— → 5.5
none → medium
0.2% → 0.2%
Last analysed / modified upstream
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.
Linux >= 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b < 7efe1c31e0903a5aa796feb96d3adab574b7ff41Linux >= 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b < 0fe037d5eaad938aa3e9143ee071aa237750b42bLinux >= 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b < 9c340473f4822bb31b151c19afd17448eda5acd1Linux >= 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b < 50c4038f1670bf9a80c6a58ae83d1602decd8481Linux >= 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b < af20e269f7459d2ce69887fdf2fad7caf986c865Linux 4.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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