Bug 2564504 (CVE-2026-120252) - CVE-2026-120252 imagecodecs: imagecodecs: Denial of Service via stack-based buffer overflow in lossless JPEG parser
Summary: CVE-2026-120252 imagecodecs: imagecodecs: Denial of Service via stack-based b...
Keywords:
Status: NEW
Alias: CVE-2026-120252
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2565164 2565165 2565167
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-01 01:02 UTC by OSIDB Bzimport
Modified: 2026-11-02 13:12 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-11-01 01:02:41 UTC 
imagecodecs 2023.1.23 through 2026.10.10 contains a stack-based buffer overflow vulnerability in the lossless JPEG Define Huffman Table parser in decode_jpegsof3(). Attackers can supply a crafted lossless JPEG whose DHT symbol counts wrap an 8-bit sum, overflowing the 32-entry HufVal and HufSz stack arrays and crashing the calling process.
Note You need to log in before you can comment on or make changes to this bug.