CVE-2026-42144
CImg Library: Integer overflow in PNM size check bypasses memory guard (_load_pnm)
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th
CImg Library is a C++ library for image processing. Prior to commit 4ca26bc, there is an integer overflow vulnerability in the W*H*D size computation inside _load_pnm() that can bypass the memory allocation guard. A crafted PNM/PGM/PPM file with large dimension values causes the overflow to wrap around, allocating an undersized buffer and potentially triggering a heap buffer overflow. Any application using CImg to load untrusted image files is affected. This issue has been patched via commit 4ca26bc.
| CWE | CWE-190 |
| Vendor | greyclab |
| Product | cimg |
| Published | May 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High
Affected Versions
GreycLab / CImg
< 4ca26bce4d8c61fcd1507d5f9401b9fb1222c27d