SB2026040883 - Fedora 44 update for mingw-openexr

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Main Vulnerability Database SB2026040883

SB2026040883 - Fedora 44 update for mingw-openexr

Published: April 8, 2026

Security Bulletin ID SB2026040883
CSH Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Use of uninitialized resource (CVE-ID: CVE-2026-34543)

CWE-ID: CWE-908 - Use of Uninitialized Resource

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to use of uninitialized resource in undo_pxr24_impl and exr_uncompress_buffer when parsing a crafted PXR24 EXR file with a truncated zlib stream. A remote attacker can supply a specially crafted EXR file to disclose sensitive information.

The issue is triggered during decoding under default settings.


2) Out-of-bounds write (CVE-ID: CVE-2026-34544)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to cause a denial of service and corrupt memory.

The vulnerability exists due to out-of-bounds write in uncompress_b44_impl() in internal_b44.c when decoding a crafted B44 or B44A EXR file via exr_decoding_run(). A remote attacker can supply a specially crafted EXR file to cause a denial of service and corrupt memory.

User interaction is required to open or decode the crafted file.


Remediation

Install update from vendor's website.

References