CVE-2026-34588

Publication date 6 April 2026

Last updated 13 May 2026

Ubuntu priority

Medium

Why this priority?

Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.1.0 to before 3.2.7, 3.3.9, and 3.4.9, internal_exr_undo_piz() advances the working wavelet pointer with signed 32-bit arithmetic. Because nx, ny, and wcount are int, a crafted EXR file can make this product overflow and wrap. The next channel then decodes from an incorrect address. The wavelet decode path operates in place, so this yields both out-of-bounds reads and out-of-bounds writes. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.

Read the notes from the security team

Status

Package Ubuntu Release Status
openexr 26.04 LTS resolute
Fixed 3.1.13-2ubuntu0.26.04.1~esm1
25.10 questing
Vulnerable
24.04 LTS noble
Fixed 3.1.5-5.1ubuntu0.1~esm1
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected

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Notes

hlibk

Introduced in 3.0.0.

References

Related Ubuntu Security Notices (USN)

Other references

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