Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-80733
Published: September 4, 2026
Vulnerability identifier: #VU146932
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80733
CWE-ID: CWE-754
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a kernel warning.
The vulnerability exists due to improper handling of unsupported socket families in sk_mc_loop() when sending packets through an AF_PACKET socket over a virtual device. A local user can send packets through a raw or packet socket to trigger a kernel warning.
The issue affects non-INET sockets, including AF_PACKET sockets used with virtual devices such as VRF or ipvlan.
Affected software
Linux kernel
How to mitigate CVE-2026-80733
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/0d75f2c1d0764efa756ad9c1e078d8c09ea8fc1f
- https://git.kernel.org/stable/c/97133c4d42654578fab95abe47359ebe784dde18
- https://git.kernel.org/stable/c/ad7dbb1d14b1b4406eca8ef9478e8de312ba0cfe
- https://git.kernel.org/stable/c/ad7fa2f411cb30f63d6725f111be134064cdb718
- https://git.kernel.org/stable/c/b8a39a09ae4eaae04309e1e38ed6a1101d967496
- https://git.kernel.org/stable/c/c8f256dc849205ccb2bd78bd99a3497b972b44e0
- https://git.kernel.org/stable/c/d2adc4e80b29e58b5162ae09f0f657a215806c8c
- https://git.kernel.org/stable/c/f625c742b33dc137c209dd13d1c5f12b1c18d71c