CVEvulnerability
CVE-2026-49418
8.8 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-08-19
- Last modified
- 2026-09-01
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-416
Description
When msync(MS_INVALIDATE) is called on a mapping of an unmanaged device object, the physical pages in the mapping range are marked invalid but remain in the pager's page list. A subsequent page fault will cause the fault handler to re-insert the page into the object's list. This corrupts the list, and on object destruction the page is freed twice.
An unprivileged local user with access to a device that provides memory-mapped I/O can trigger a use-after-free in the kernel, though this is limited to a pool of objects ("fictitious pages") that are never recycled for a different purpose. It may be possible to exploit this to escalate privileges.
Affected configurations
• freebsd freebsd 14.3
• freebsd freebsd 14.4
• freebsd freebsd 15.0
• freebsd freebsd 15.1
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- https://security.freebsd.org/advisories/FreeBSD-SA-26:37.vm.asc Vendor Advisory