VULNERABILITY INTELLIGENCE

CVE-2026-58094

CVSS score7.8 HIGH
EPSS probability0.12%
CISA KEVNot currently listed
Published2026-08-26
Last modified2026-09-24
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

The FIOSSHMLPGCNF ioctl(2) operation configures the page size for a largepage shared memory object. This is intended to be used immediately after creating the object, before any memory is allocated for the object. The handler checked whether a page size had already been configured without holding the rangelock. Two concurrent callers could both observe an unconfigured object and set conflicting page sizes, leaving the object in an inconsistent state. An unprivileged local user can exploit this race to escalate privileges.

Weakness classification

  • secteam@freebsd.org: CWE-367

Primary references