CVE-2026-43109

x86: shadow stacks: proper error handling for mmap lock

State: Published
Severity: Not scored
Published: May 6, 2026
Updated: May 17, 2026
Reserved: May 1, 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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	7fad2a432cd35bbf104d2d9d426e74902f22aa95 to before c79cf42321600e931933e11f94aba8b245d4cd66Affected 7fad2a432cd35bbf104d2d9d426e74902f22aa95 to before 1a30468eff661937d978495644d2e5ebfeef5ce6Affected 7fad2a432cd35bbf104d2d9d426e74902f22aa95 to before c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4Affected 7fad2a432cd35bbf104d2d9d426e74902f22aa95 to before 262b6d38a81d51b135db81e1f30c13d30e38feeeAffected 7fad2a432cd35bbf104d2d9d426e74902f22aa95 to before 52f657e34d7b21b47434d9d8b26fa7f6778b63a0Affected
LinuxLinux	6.6Affected before 6.6Not affected 6.6.140 through 6.6.Not affected 6.12.88 through 6.12.Not affected 6.18.24 through 6.18.Not affected 6.19.14 through 6.19.Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

7fad2a432cd35bbf104d2d9d426e74902f22aa95 to before c79cf42321600e931933e11f94aba8b245d4cd66Affected
7fad2a432cd35bbf104d2d9d426e74902f22aa95 to before 1a30468eff661937d978495644d2e5ebfeef5ce6Affected
7fad2a432cd35bbf104d2d9d426e74902f22aa95 to before c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4Affected
7fad2a432cd35bbf104d2d9d426e74902f22aa95 to before 262b6d38a81d51b135db81e1f30c13d30e38feeeAffected
7fad2a432cd35bbf104d2d9d426e74902f22aa95 to before 52f657e34d7b21b47434d9d8b26fa7f6778b63a0Affected

LinuxLinux

6.6Affected
before 6.6Not affected
6.6.140 through 6.6.*Not affected
6.12.88 through 6.12.*Not affected
6.18.24 through 6.18.*Not affected
6.19.14 through 6.19.*Not affected
7.0 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.