High7.5Red Hat Linux

High [CVE-2026-54059] Denial of Service via crafted PCF font data

This high-severity Red Hat Linux advisory covers CVE-2026-54059 affecting Red Hat Enterprise Linux 8.

CVE-2026-54059 Published Jul 6, 2026Updated by vendor Jul 6, 2026

CVE-2026-54059

Affected products & platforms

Red Hat LinuxUnclassified

Open vendor advisory

Android app · Google Play

Monitor future Red Hat Linux CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.

Matching phone alertsOptional email delivery

Get CVE alerts See app features

Summary

Denial of Service via crafted PCF font data. Red Hat rates this important (CVSS 7.5).

Weakness: CWE-409. Red Hat lists fixing advisory RHSA-2026:39127 with package python-pillow-0:5.1.1-22.el8_10.

Affected product named by the advisory: Red Hat Enterprise Linux 8.

Affected versions

< 12.3.0

Official advisory · high-confidence parse· fetched 1 month ago·verify at source

Fixed versions

python-pillow-0:5.1.1-22.el8_10
RHSA-2026:39127

Official advisory · high-confidence parse· fetched 1 month ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Do not load PCF fonts from untrusted sources. If PCF font loading is required, validate font file dimensions before passing them to Pillow, or upgrade to Pillow 12.3.0 or later which includes the fix for this vulnerability.

Official advisory · high-confidence parse· fetched 1 month ago·verify at source

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.