SB2026040875 - Multiple vulnerabilities in OpenEXR

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Main Vulnerability Database SB2026040875

SB2026040875 - Multiple vulnerabilities in OpenEXR

Published: April 8, 2026

Security Bulletin ID SB2026040875
Severity
High
Patch available
YES
Number of vulnerabilities 7
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 29% Medium 57% Low 14%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 7 secuirty vulnerabilities.


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

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)

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.


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

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.


4) Integer overflow (CVE-ID: CVE-2026-34589)

The vulnerability allows a remote attacker to execute arbitrary code or cause a denial of service.

The vulnerability exists due to integer overflow leading to an out-of-bounds write in the DWA lossy decoder when parsing a crafted scanline DWAA file. A remote attacker can supply a specially crafted file to execute arbitrary code or cause a denial of service.

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


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

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.


6) Type conversion (CVE-ID: CVE-2026-34379)

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

The vulnerability exists due to incorrect type conversion or cast in LossyDctDecoder_execute() when decoding a DWA- or DWAB-compressed EXR file containing a FLOAT-type channel. A remote attacker can supply a specially crafted EXR file to cause a denial of service.

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


7) Integer overflow (CVE-ID: CVE-2026-34378)

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

The vulnerability exists due to integer overflow in generic_unpack() when parsing crafted EXR files with a negative dataWindow.min.x value. A remote attacker can supply a specially crafted EXR file to cause a denial of service.

User interaction is required to open or process the crafted EXR file.


Remediation

Install update from vendor's website.

References