Detections
Analytics
CVE-2026-49428
high
Description
Certain system calls, such open(2) with the O_TRUNC flag set, and fspacectl(2), could incorrectly free memory in largepage objects. These operations are not permitted on largepage objects, but the implementation did not verify this. An unprivileged local user can abuse the bug to access freed kernel memory. This can be exploited to escalate privileges.
References
https://security.freebsd.org/advisories/FreeBSD-SA-26:44.posixshm.asc