CVE-2026-43109

MEDIUM

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.

CVSS v3.1 Score

5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Published: 5/6/2026Modified: 6/17/2026

Related Intelligence (1)

CRITICALAi

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CVE-2026-41089CVE-2020-1472
Rapid7

References (5)

https://git.kernel.org/stable/c/1a30468eff661937d978495644d2e5ebfeef5ce6https://git.kernel.org/stable/c/262b6d38a81d51b135db81e1f30c13d30e38feeePatchhttps://git.kernel.org/stable/c/52f657e34d7b21b47434d9d8b26fa7f6778b63a0Patchhttps://git.kernel.org/stable/c/c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4Patchhttps://git.kernel.org/stable/c/c79cf42321600e931933e11f94aba8b245d4cd66