SB2026050839 - Ubuntu update for openexr

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Main Vulnerability Database SB2026050839

SB2026050839 - Ubuntu update for openexr

Published: May 8, 2026

Security Bulletin ID SB2026050839
CSH Severity
High
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 33% Medium 33% Low 33%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Integer overflow (CVE-ID: CVE-2026-27622)

CWE-ID: CWE-190 - Integer overflow

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 execute arbitrary code.

The vulnerability exists due to integer overflow in CompositeDeepScanLine::readPixels when parsing a crafted multipart deep EXR file. A remote attacker can supply a specially crafted file to execute arbitrary code.

User interaction is required to open or process the crafted file through multipart deep read flows using MultiPartInputFile, DeepScanLineInputPart, and CompositeDeepScanLine.


2) Integer overflow (CVE-ID: CVE-2026-34380)

CWE-ID: CWE-190 - Integer overflow

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


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

The vulnerability exists due to integer overflow or wraparound in undo_pxr24_impl() in src/lib/OpenEXRCore/internal_pxr24.c when parsing a crafted PXR24-compressed EXR file. A remote attacker can supply a specially crafted EXR file to cause a denial of service and modify memory.

User interaction is required to open or process the crafted file, and exploitation requires a FLOAT channel using PXR24 compression.


3) Integer overflow (CVE-ID: CVE-2026-34588)

CWE-ID: CWE-190 - Integer overflow

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


The vulnerability allows a remote attacker to read and write out-of-bounds memory.

The vulnerability exists due to integer overflow in internal_exr_undo_piz() in the PIZ decoder when parsing a crafted EXR file. A remote attacker can supply a specially crafted EXR file to read and write out-of-bounds memory.

The issue occurs during PIZ decompression because signed 32-bit arithmetic can wrap while advancing the working wavelet pointer, causing the next channel to decode from an incorrect address.


Remediation

Install update from vendor's website.

References