Description
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.
Affected products
tonycoz: imager
References4
- github.com/tonycoz/imager/security/advisories/GHSA-4rx6-cgv3-fm… MitigationVendor Advisory
- github.com/tonycoz/imager/commit/aae49c6be065aa467e834105c81635… Patch
- metacpan.org/release/TONYC/Imager-1.037/changes Release Notes
- www.openwall.com/lists/oss-security/2026/10/01/10 Mailing ListThird Party Advisory
Metrics
- CVSS 3.1
-
6.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L - EPSS — exploit probability
- 0% percentile: 16 · as of 10 November 2026
- CWE
- CWE-131
Could this be exploited in your environment?
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