SB2026100260 - Debian update for libpng1.6
Published: October 2, 2026
Security Bulletin ID
SB2026100260
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-46675)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/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 use-after-free in the libpng sequential reader's png_read_end function when processing crafted zTXt, iTXt, or iCCP chunks after incomplete decompression. A remote attacker can provide a crafted PNG file to cause a denial of service.
Exploitation requires an application to call png_read_end after png_read_info without first reading image rows.
Remediation
Install update from vendor's website.