SB20261021111 - Red Hat Enterprise Linux 9 update for openexr
Published: October 21, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 vulnerabilities.
1) Out-of-bounds write (CVE-ID: CVE-2026-34544)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 8.6 [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]
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.
2) Out-of-bounds write (CVE-ID: CVE-2026-59982)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds write in the DWAA scanline decode path reachable via the public C++ Imf::InputFile::readPixels() API when parsing a crafted DWAA-compressed scanline EXR file. A remote attacker can trick the victim into opening a crafted file to cause a denial of service.
Only 32-bit ILP32 builds are affected; user interaction is required to open the crafted EXR file, and the issue was not demonstrated on LP64 builds.
3) Out-of-bounds write (CVE-ID: CVE-2026-59184)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds write in OpenEXRUtil TypedFlatImageChannel<T>::row() when processing a crafted EXR file with a non-zero dataWindow.min. A remote attacker can trick the victim into opening a crafted file to cause a denial of service.
User interaction is required to open the crafted EXR file, and exploitation depends on downstream code writing rows through FlatHalfChannel::row() on a loaded image.
4) Out-of-bounds read (CVE-ID: CVE-2026-59189)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds read in TypedDeepImageChannel<T>::row(row) in OpenEXRUtil when parsing a crafted deep EXR file with a non-zero dataWindow origin. A remote attacker can trick the victim into opening a crafted file to cause a denial of service.
The issue can also lead to potential information disclosure when surrounding heap layout makes the out-of-bounds pointer array entry application-observable.
5) Out-of-bounds read (CVE-ID: CVE-2026-59981)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service and disclose sensitive information.
The vulnerability exists due to out-of-bounds read in the OpenEXRUtil SampleCountChannel::row() API when parsing a crafted deep EXR image with a non-zero dataWindow origin. A remote attacker can trick the victim into opening a crafted file to cause a denial of service and disclose sensitive information.
User interaction is required to open a crafted file.
Remediation
Install update from vendor's website.