Bug 2564500 (CVE-2026-120251) - CVE-2026-120251 imagecodecs: imagecodecs: Denial of Service via infinite loop in CCITT Group 4 decoding
Summary: CVE-2026-120251 imagecodecs: imagecodecs: Denial of Service via infinite loop...
Keywords:
Status: NEW
Alias: CVE-2026-120251
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: 2565166 2565168 2565169
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:
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Description OSIDB Bzimport 2026-11-01 01:02:25 UTC 
imagecodecs 2026.3.6 through 2026.10.10 contains an infinite loop vulnerability in ccitt_fax4_decode_size() that allows attackers to hang the calling process by supplying a crafted CCITT Group 4 stream. Attackers can provide an 8-byte G4 stream lacking EOFB to ccittfax4_decode() or the numcodecs Ccittfax4 codec, consuming full CPU until the process is killed.
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