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🛡️ JLSEC-2026-79 — fontconfig-jll

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

fontconfig before 2.17.1 has an off-by-one error in allocation during sfnt capability handling, leading to a one-byte out-of-bounds write, and potentially a crash or code execution. This is in FcFontCapabilities in fcfreetype.c.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Affected software

JLSEC-2026-79 is recorded against 1 package.

  • fontconfig-jll

Timeline and source

Published on 11 April 2026 and last revised on 18 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

gitlab.freedesktop.org (Web)
gitlab.freedesktop.org (Web)
gitlab.freedesktop.org (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-04-11
Updated 2026-08-20
Modified 2026-07-18
Fix URL N/A

Affected Packages

Software From version Fixed in
fontconfig-jll

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.