What is CVE-2025-28162?

CVE-2025-28162 is a medium-severity vulnerability in Libpng, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2026-01-27.

How severe is CVE-2025-28162?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Libpng

CVE-2025-28162

Buffer Overflow vulnerability in libpng 1.6.43-1.6.46 allows a local attacker to cause a denial of service via the pngimage with AddressSanitizer (ASan), the program leaks memory in various locations, eventually leading to high memory usage and causing the program to become unresponsive

Vulnerability class: Buffer Overflow

Published 2026-01-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (4.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 4.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000

Affected products

Libpng

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

github.com/pnggroup/libpng/issues/656 (Exploit, Issue Tracking)
gist.github.com/kittener/fbfdb9b5610c6b3db0d5dea045a07c60 (Third Party Advisory)

Frequently asked questions

What is CVE-2025-28162?: CVE-2025-28162 is a medium-severity vulnerability in Libpng, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 5.5/10. Published 2026-01-27.
How severe is CVE-2025-28162?: Medium severity. CVSS v3 base score is 5.5 out of 10.