CVE-2026-43109

MediumCVSS 5.5/10Last modified Nov 11, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

x86: shadow stacks: proper error handling for mmap lock

김영민 reports that shstk_pop_sigframe() doesn't check for errors from mmap_read_lock_killable(), which is a silly oversight, and also shows that we haven't marked those functions with "__must_check", which would have immediately caught it.

So let's fix both issues.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected software

VendorProductVersions
LinuxLinux>= 7fad2a432cd35bbf104d2d9d426e74902f22aa95, < c79cf42321600e931933e11f94aba8b245d4cd66; >= 7fad2a432cd35bbf104d2d9d426e74902f22aa95, < 1a30468eff661937d978495644d2e5ebfeef5ce6; >= 7fad2a432cd35bbf104d2d9d426e74902f22aa95, < c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4; >= 7fad2a432cd35bbf104d2d9d426e74902f22aa95, < 262b6d38a81d51b135db81e1f30c13d30e38feee; >= 7fad2a432cd35bbf104d2d9d426e74902f22aa95, < 52f657e34d7b21b47434d9d8b26fa7f6778b63a0
LinuxLinux6.6

References

Timeline

Published
May 6, 2026
Last modified
Nov 11, 2026
NVD status
Modified

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CVE-2026-43109: Medium severity, CVSS 5.5 | Vulnix