What is CVE-2026-45258?

CVE-2026-45258 is a high-severity vulnerability in Freebsd, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2026-06-27.

How severe is CVE-2026-45258?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2026-45258 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Out-of-bounds Read in Freebsd

CVE-2026-45258

dsp_mmap_single() validated the requested mapping by checking the sum of the user-supplied offset and length against the buffer size. This addition could overflow, so that a large offset and length wrapped around and passed the check. Th…

Vulnerability class: Buffer Overflow

EPSS: 0.002 (4.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Freebsd — versions 14.3, 15.0, 14.4-RELEASE

Weakness classification (CWE)

Public proof-of-concept exploits

Yayoi-cs/CVE-2026-45258_1day_LPE_exploit

References

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

Frequently asked questions

What is CVE-2026-45258?: CVE-2026-45258 is a high-severity vulnerability in Freebsd, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2026-06-27.
How severe is CVE-2026-45258?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2026-45258 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.