VulnerabilityAnalyzed

CVE-2026-49428

This can be exploited to escalate privileges.

HIGH 8.4EPSS 0.29%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.29%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Certain system calls, such open(2) with the O_TRUNC flag set, and fspacectl(2), could incorrectly free memory in largepage objects. These operations are not permitted on largepage objects, but the implementation did not verify this. An unprivileged local user can abuse the bug to access freed kernel memory. This can be exploited to escalate privileges.

CVSS 3.1: 8.4 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.29% probability · 22th percentile
CISA KEV: Not listed
Weakness: CWE-915
Affected: freebsd/freebsd
Source: secteam@freebsd.org

References

https://security.freebsd.org/advisories/FreeBSD-SA-26:44.posixshm.ascVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.