PT-2026-37419 · Linux · Linux

Published 2026-05-06 · Updated 2026-05-06 · CVE-2026-43109

Mitre

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.

Related Identifiers

CVE-2026-43109

Affected Products

Linux

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-43109 · Security Note
• https://git.kernel.org/stable/c/52f657e34d7b21b47434d9d8b26fa7f6778b63a0 · Note
• https://git.kernel.org/stable/c/c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4 · Note
• https://git.kernel.org/stable/c/262b6d38a81d51b135db81e1f30c13d30e38feee · Note