CVE-2026-49418
HIGH
MEDIUM
Priority: 0.04
BB Relevance:
68/100
Published: 2026-08-19
Modified: 2026-11-05
First seen: 2026-11-05
Status: active
Attack Surface
Network
Low Complexity
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
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.
Weakness Classification (1)
Affected Software (38)
| Vendor | Product | Version |
|---|---|---|
| freebsd | freebsd | 14.3 |
| freebsd | freebsd | 14.3 |
| freebsd | freebsd | 14.3 |
| freebsd | freebsd | 14.3 |
| freebsd | freebsd | 14.3 |
| freebsd | freebsd | 14.3 |
| freebsd | freebsd | 14.3 |
| freebsd | freebsd | 14.3 |
| freebsd | freebsd | 14.3 |
| freebsd | freebsd | 14.3 |
| freebsd | freebsd | 14.3 |
| freebsd | freebsd | 14.3 |
| freebsd | freebsd | 14.3 |
| freebsd | freebsd | 14.3 |
| freebsd | freebsd | 14.3 |
| freebsd | freebsd | 14.3 |
| freebsd | freebsd | 14.4 |
| freebsd | freebsd | 14.4 |
| freebsd | freebsd | 14.4 |
| freebsd | freebsd | 14.4 |
| freebsd | freebsd | 14.4 |
| freebsd | freebsd | 14.4 |
| freebsd | freebsd | 14.4 |
| freebsd | freebsd | 14.4 |
| freebsd | freebsd | 15.0 |
| freebsd | freebsd | 15.0 |
| freebsd | freebsd | 15.0 |
| freebsd | freebsd | 15.0 |
| freebsd | freebsd | 15.0 |
| freebsd | freebsd | 15.0 |
Showing 30 of 38 entries
References & Advisories (1)
Vendor Advisory