Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.6, < 6.18.24 |
References
- https://git.kernel.org/stable/c/1a30468eff661937d978495644d2e5ebfeef5ce6
- https://git.kernel.org/stable/c/262b6d38a81d51b135db81e1f30c13d30e38feeePatch
- https://git.kernel.org/stable/c/52f657e34d7b21b47434d9d8b26fa7f6778b63a0Patch
- https://git.kernel.org/stable/c/c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4Patch
- https://git.kernel.org/stable/c/c79cf42321600e931933e11f94aba8b245d4cd66
FAQ
What is CVE-2026-43109?
CVE-2026-43109 is a vulnerability with a CVSS score of 5.5 (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_r...
How severe is CVE-2026-43109?
CVE-2026-43109 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43109?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.