CVE-2026-22801

Publication date 12 January 2026

Last updated 12 February 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.8 · Medium

Score breakdown

Description

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From 1.6.26 to 1.6.53, there is an integer truncation in the libpng simplified write API functions png_write_image_16bit and png_write_image_8bit causes heap buffer over-read when the caller provides a negative row stride (for bottom-up image layouts) or a stride exceeding 65535 bytes. The bug was introduced in libpng 1.6.26 (October 2016) by casts added to silence compiler warnings on 16-bit systems. This vulnerability is fixed in 1.6.54.

Status

Package Ubuntu Release Status
libpng 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
libpng1.6 25.10 questing
Fixed 1.6.50-1ubuntu0.3
25.04 plucky
Fixed 1.6.47-1.1ubuntu0.3
24.04 LTS noble
Fixed 1.6.43-5ubuntu0.3
22.04 LTS jammy
Fixed 1.6.37-3ubuntu0.3
20.04 LTS focal
Fixed 1.6.37-2ubuntu0.1~esm2
18.04 LTS bionic
Fixed 1.6.34-1ubuntu0.18.04.2+esm2
16.04 LTS xenial
Not affected
firefox 25.10 questing
Not affected
25.04 plucky
Not affected
24.04 LTS noble
Not affected
22.04 LTS jammy
Not affected
chromium-browser 25.10 questing
Not affected
25.04 plucky
Not affected
24.04 LTS noble
Not affected
22.04 LTS jammy
Not affected
thunderbird 25.10 questing
Not affected
25.04 plucky Ignored end of life, was needs-triage
24.04 LTS noble
Not affected
22.04 LTS jammy
Not affected

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libpng1.6

Severity score breakdown

Parameter Value
Base score 6.8 · Medium
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-7963-1
    • libpng vulnerabilities
    • 14 January 2026
    • USN-8035-1
    • libpng vulnerabilities
    • 12 February 2026

Other references