Imager versions before 1.037 for Perl overflow a heap buffer fetching float samples from a paletted image in i_gsampf_fp. For a paletted image, getsamples() with type "float" allocates a buffer of one sample per pixel and fetches every requested channel of each pixel into it. Requesting more than one channel writes past its end. An attacker-supplied image controls the overflowing bytes through its palette.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/tonycoz/imager/commit/aae49c6be065aa467e834105c816359394a634db.patch Patch
- https://github.com/tonycoz/imager/security/advisories/GHSA-4rx6-cgv3-fmxp Mitigation, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 6.3 · tonycozNVD modified 2026-10-08 13:17
Affected (CPE criteria) 1
cpe:2.3:a:tonycoz:imager:*:*:*:*:*:perl:*:*
References 4
- https://github.com/tonycoz/imager/commit/aae49c6be065aa467e834105c816359394a634db.patch Patch
- https://github.com/tonycoz/imager/security/advisories/GHSA-4rx6-cgv3-fmxp Mitigation, Vendor Advisory
- https://metacpan.org/release/TONYC/Imager-1.037/changes Release Notes
- http://www.openwall.com/lists/oss-security/2026/10/01/10 Mailing List, Third Party Advisory