Vulnerability Details CVE-2026-49427
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 19.3%
CVSS Severity
CVSS v3 Score 8.8