by Kastro
Paper/Archive/CVE-2025-57807

CVE-2025-57807

ImageMagick ImageMagick — ImageMagick BlobStream Forward-Seek Under-Allocation

EPSS 0.3%public exploitCVSS 9.8
critical.is priorityof 100
44
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 21.7.217 × 204.3Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

ImageMagick is free and open-source software used for editing and manipulating digital images. ImageMagick versions lower than 14.8.2 include insecure functions: SeekBlob(), which permits advancing the stream offset beyond the current end without increasing capacity, and WriteBlob(), which then expands by quantum + length (amortized) instead of offset + length, and copies to data + offset. When offset ≫ extent, the copy targets memory beyond the allocation, producing a deterministic heap write on 64-bit builds. No 2⁶⁴ arithmetic wrap, external delegates, or policy settings are required. This is fixed in version 14.8.2.

Affected

ProductAffectedFixed inSource
ImageMagick< 14.8.2–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)3.8CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: partial

References

exploitgithub.com/ImageMagick/ImageMagick/security/advisories/GHSA-23hg-53q6-hqfgrefgithub.com/ImageMagick/ImageMagick/commit/077a417a19a5ea8c85559b602754a5b928eef23ereflists.debian.org/debian-lts-announce/2025/09/msg00012.html