Signed to Unsigned Conversion Error in Linux kernel - CVE-2026-97612
Published: September 28, 2026
Vulnerability identifier: #VU152588
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97612
CWE-ID: CWE-195
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause memory corruption.
The vulnerability exists due to stale inner protocol state in skb_mpls_pop() when Open vSwitch re-pushes MPLS after all labels have been popped and the packet has been recirculated. A local user can trigger MPLS label push, pop, recirculation, and a subsequent label push to cause memory corruption.
Affected software
Linux kernel
How to mitigate CVE-2026-97612
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3