CVE-2026-54058

Pillow: Out-of-bounds read via attacker-controlled row stride on Pillow's mmap path (McIdas AREA files)

Description

Pillow is a Python imaging library. Prior to 12.3.0, when Pillow loads an uncompressed McIdas AREA image from a filename through the mmap raw codec path, attacker-controlled header words can set a row stride smaller than the natural row width, causing pixel access such as Image.tobytes(), getpixel, convert, or save to read beyond the mapped region and disclose adjacent process memory or fault. This issue is fixed in version 12.3.0.

Scores

Weaknesses (CWE)

• CWE-125

Advisories

• GHSA-62p4-gmf7-7g93 — Pillow: Out-of-bounds read via attacker-controlled row stride on Pillow's mmap path (McIdas AREA files)
• PYSEC-2026-3493 — Pillow: Out-of-bounds read via attacker-controlled row stride on Pillow's mmap path (McIdas AREA files)

European references

• ENISA EUVD · EUVD-2026-43735
• GCVE · GCVE-0-2026-54058

CERT-FR advisories

• CERTFR-2026-AVI-1366 — Multiples vulnérabilités dans les produits Splunk · cert.ssi.gouv.fr
• CERTFR-2026-AVI-1094 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

• cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:* < 12.3.0

Affected products

References

• https://github.com/python-pillow/Pillow/security/advisories/GHSA-62p4-gmf7-7g93
• https://github.com/python-pillow/Pillow/pull/9719
• https://github.com/python-pillow/Pillow/commit/6a8de891fb00968e5ea79bfa84368ed90b3cfc1d
• https://github.com/python-pillow/Pillow/releases/tag/12.3.0

Sources