CVE-2026-49418 Use-after-free in device pager page list

When msyncMSINVALIDATE 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, a...

CVE-2026-49418

On FreeBSD, calling msync(MS_INVALIDATE) on a mapping of an unmanaged device object leaves invalidated pages in the pager's page list; a subsequent page fault re-inserts them, corrupting the list and causing a double-free on object destruction. An unprivileged local user with memory-mapped I/O ac...

FreeBSD : FreeBSD -- Use-after-free in device pager page list (5a34b147-74e0-11f1-958d-bc241121aa0a)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 5a34b147-74e0-11f1-958d-bc241121aa0a advisory. When msyncMSINVALIDATE is called on a mapping of an unmanaged device object, the physical pages in the...

FreeBSD-SA-26:37.vm

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-26:37.vm Security Advisory The FreeBSD Project Topic: Use-after-free in device pager page list Category: core Module: vm Announced: 2026-06-30 Credits: slidybat...

FreeBSD -- Use-after-free in device pager page list

Problem Description: When msyncMSINVALIDATE 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...