CVE-2026-49427

Published: Ago 19, 2026 Last Modified: Ago 19, 2026
ExploitDB:
Other exploit source:
Google Dorks:

Description

AI Translation Available

Pages belonging to largepage shared memory objects were not explicitly wired. When sendfile(2) transmitted such an object with the SF_NOCACHE flag, it freed the underlying pages after transmission even though existing mappings still referred to them.

An unprivileged local user can abuse the bug to access freed kernel memory. This can be exploited to escalate privileges.

826

Premature Release of Resource During Expected Lifetime

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Availability Integrity
Potential Impacts:
Read Application Data Read Memory Dos: Crash, Exit, Or Restart Execute Unauthorized Code Or Commands Modify Application Data Modify Memory
Applicable Platforms
All platforms may be affected
View CWE Details
https://security.freebsd.org/advisories/FreeBSD-SA-26:44.po…
https://security.freebsd.org/advisories/FreeBSD-SA-26:44.posixshm.asc