Medium [CVE-2026-52584] Information disclosure via Buffer Overflow in DecodeImageAPNG function
This medium-severity Red Hat Linux advisory covers CVE-2026-52584 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.
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Summary
Buffer Overflow vulnerability in libjxl v.0.11.2 and before allows a local attacker to obtain sensitive information via the DecodeImageAPNG function A flaw was found in libjxl. The flaw occurs within the `DecodeImageAPNG` function, which can lead to unauthorized disclosure of data.
Red Hat ships libjxl as a bundled component within Firefox and Thunderbird. The vulnerable code path is in the APNG decoder (DecodeImageAPNG), which is part of the extras module used by command-line tools.
Red Hat severity: Moderate — CVSS 5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N). Weakness: CWE-120.
Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9. Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: firefox; Red Hat package: thunderbird.
- < 0.11.2
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
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