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CVE-2026-80733

net: remove WARN_ON_ONCE() from sk_mc_loop()

Published: Sep 3, 2026Updated: Sep 3, 2026 Sources: CVE List NVD
N/ACVSS
NVD MITRE
EPSS Score
0.2%
Top 88.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
OpenVAS

Description

In the Linux kernel, the following vulnerability has been resolved: net: remove WARN_ON_ONCE() from sk_mc_loop() sk_mc_loop() can be called for sockets that are neither AF_INET nor AF_INET6 (e.g. AF_PACKET sockets when sending packets via raw/packet socket over virtual devices such as VRF or ipvlan). In such cases, sk_family is not AF_INET/AF_INET6 and sk_mc_loop() falls through the switch statement and triggers WARN_ON_ONCE(1). Non-INET sockets do not support IP_MULTICAST_LOOP or IPV6_MULTICAST_LOOP options, so loopback should default to true without generating a warning.

No summary for this CVE yet.

Affected Products

Linux
oss-projectaka the linux kernel
LinuxOn-premOS
Operating Systems / linux-distro

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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References

https://git.kernel.org/stable/c/97133c4d42654578fab95abe47359ebe784dde18
git.kernel.org
https://git.kernel.org/stable/c/f625c742b33dc137c209dd13d1c5f12b1c18d71c
git.kernel.org
https://git.kernel.org/stable/c/ad7fa2f411cb30f63d6725f111be134064cdb718
git.kernel.org
and 5 more references View all →
News mentions
1

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