What is CVE-2026-45253?

CVE-2026-45253 is a high-severity vulnerability in Freebsd, classified under Out-of-bounds Write. CVSS score: 8.4/10. Published 2026-05-21.

How severe is CVE-2026-45253?

High severity. CVSS v3 base score is 8.4 out of 10.

Buffer overflow in Freebsd

CVE-2026-45253

ptrace(PT_SC_REMOTE) failed to properly validate parameters for the syscall(2) and __syscall(2) meta-system calls. As a result, a user with the ability to debug a process may trigger arbitrary code execution in the kernel, even if the tar…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (1.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Freebsd — versions 14.3, 15.0, 14.4-RELEASE

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

secteam@freebsd.org (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-45253?: CVE-2026-45253 is a high-severity vulnerability in Freebsd, classified under Out-of-bounds Write. CVSS score: 8.4/10. Published 2026-05-21.
How severe is CVE-2026-45253?: High severity. CVSS v3 base score is 8.4 out of 10.