CVE-2026-43109

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> x86: shadow stacks: proper error handling for mmap lock<br /> <br /> 김영민 reports that shstk_pop_sigframe() doesn&amp;#39;t check for errors from<br /> mmap_read_lock_killable(), which is a silly oversight, and also shows<br /> that we haven&amp;#39;t marked those functions with "__must_check", which would<br /> have immediately caught it.<br /> <br /> So let&amp;#39;s fix both issues.