CVE-2026-49428: Improperly Controlled Modification of Dynamically-Determined Object Attributes

Certain system calls, such open2 with the OTRUNC flag set, and fspacectl2, 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...

FreeBSD : FreeBSD -- Multiple vulnerabilities in POSIX largepage objects (91017b3b-74e2-11f1-958d-bc241121aa0a)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 91017b3b-74e2-11f1-958d-bc241121aa0a advisory. Pages belonging to largepage shared memory objects were not explicitly wired. When sendfile2...

FreeBSD -- Multiple vulnerabilities in POSIX largepage objects

Problem Description: Pages belonging to largepage shared memory objects were not explicitly wired. When sendfile2 transmitted such an object with the SFNOCACHE flag, it freed the underlying pages after transmission even though existing mappings still referred to them. CVE-2026-49427 Separately,...