CVE-2018-11490: Canonical Ubuntu Linux

High severity, CVSS 8.8. EPSS: 2.4% chance of exploitation in the next 30 days.

The DGifDecompressLine function in dgif_lib.c in GIFLIB (possibly version 3.0.x), as later shipped in cgif.c in sam2p 0.49.4, has a heap-based buffer overflow because a certain "Private->RunningCode - 2" array index is not checked. This will lead to a denial of service or possibly unspecified other impact.

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 19.04 only
• Debian Debian Linux: version 10.0 only
• Giflib Project Giflib: from 3.0, up to and including 3.1.1
• SAM2P Project SAM2P: version 0.49.4 only

Published 2018-05-26. Last modified 2026-06-17.