CVE-2026-43109

x86: shadow stacks: proper error handling for mmap lock

Published: 5/6/2026 Last updated: 5/17/2026 Reserved: 5/1/2026

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.

CNA assigner: Linux (416baaa9-dc9f-4396-8d5f-8c081fb06d67) Requested by: n/a

Opam packages affected (29)

albatross cdrom conf-bpftool conf-libbpf conf-linux-libc-dev core core_unix hvsock mirage-block-unix mm ocaml-probes ortools_solvers orun rawlink rawlink-eio rawlink-lwt restricted shell solo5 solo5-bindings-hvt solo5-bindings-spt solo5-cross-aarch64 solo5-kernel-ukvm tracy-client tuntap uring vhd-format vhd-format-lwt xapi-stdext-unix

Products affected (4)

Product	Vendor	Version
Linux	Linux	< publication
Linux	Linux	< publication
Linux	Linux	Windows 10 Version 1803 for ARM64-based Systems
Linux	Linux	Windows 10 Version 1809 for 32-bit Systems

CVE-2026-43109

x86: shadow stacks: proper error handling for mmap lock

Opam packages affected (29)

Products affected (4)

References (10)