CVE-2026-43109

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7fad2a432cd35bbf104d2d9d426e74902f22aa95 < c79cf42321600e931933e11f94aba8b245d4cd66affected
LinuxLinux7fad2a432cd35bbf104d2d9d426e74902f22aa95 < 1a30468eff661937d978495644d2e5ebfeef5ce6affected
LinuxLinux7fad2a432cd35bbf104d2d9d426e74902f22aa95 < c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4affected
LinuxLinux7fad2a432cd35bbf104d2d9d426e74902f22aa95 < 262b6d38a81d51b135db81e1f30c13d30e38feeeaffected
LinuxLinux7fad2a432cd35bbf104d2d9d426e74902f22aa95 < 52f657e34d7b21b47434d9d8b26fa7f6778b63a0affected
LinuxLinux6.6affected
LinuxLinux0 < 6.6unaffected
LinuxLinux6.6.140 <= 6.6.*unaffected
LinuxLinux6.12.88 <= 6.12.*unaffected
LinuxLinux6.18.24 <= 6.18.*unaffected
LinuxLinux6.19.14 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References