Buffer overflow in Libpng
CVE-2025-65018
LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, there is a heap buffer overflow vulnerability in the libpng simplified API function png_image_finish_read when processing 16-bit interlaced PNGs with 8-bit output format. Attacker-crafted interlaced PNG files cause heap writes beyond allocated buffer bounds. This issue has been patched in version 1.6.51.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (15.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Libpng
- Pnggroup Libpng — versions >= 1.6.0, < 1.6.51
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/pnggroup/libpng/security/advisories/GHSA-7wv6-48j4-hj3g (Exploit, Vendor Advisory)
- github.com/pnggroup/libpng/issues/755 (Exploit, Issue Tracking)
- github.com/pnggroup/libpng/pull/757 (Issue Tracking)
- github.com/pnggroup/libpng/commit/16b5e3823918840aae65c0a6da57c78a5a496a4d (Patch)
- github.com/pnggroup/libpng/commit/218612ddd6b17944e21eda56caf8b4bf7779d1ea (Patch)
Frequently asked questions
- What is CVE-2025-65018?
- CVE-2025-65018 is a high-severity vulnerability in Libpng, classified under Heap-based Buffer Overflow. CVSS score: 7.1/10. Published 2025-11-25.
- How severe is CVE-2025-65018?
- High severity. CVSS v3 base score is 7.1 out of 10.
- Is CVE-2025-65018 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.