CVE-2026-43109

MEDIUM

x86: shadow stacks: proper error handling for mmap lock

Title source: cna
STIX 2.1

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.

References (5)

Core 5

Scores

CVSS v3 5.5
EPSS 0.0011
EPSS Percentile 1.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (21)
linux/Kernel 6.13.0 - 6.18.24linux
linux/Kernel 6.19.0 - 6.19.14linux
linux/Kernel 6.6.0 - 6.6.140linux
linux/Kernel 6.7.0 - 6.12.88linux
Linux/Linux < 6.6
Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - 262b6d38a81d51b135db81e1f30c13d30e38feee
Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - 52f657e34d7b21b47434d9d8b26fa7f6778b63a0
Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4
Linux/Linux 6.12.88 - 6.12.*
Linux/Linux 6.18.24 - 6.18.*
... and 11 more
Published May 06, 2026
Tracked Since May 06, 2026