What is CVE-2018-11490?

CVE-2018-11490 is a high-severity vulnerability in Giflib Project, classified under Improper Validation of Array Index. CVSS score: 8.8/10. Published 2018-05-26.

How severe is CVE-2018-11490?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Giflib Project

CVE-2018-11490

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.

Published 2018-05-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.024 (84.1th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000

Affected products

Giflib Project
Sam2p Project — versions 0.49.4
Canonical Ubuntu Linux — versions 16.04, 18.04, 19.04
Debian Linux — versions 10.0

Weakness classification (CWE)

References

www.securityfocus.com/bid/104327 (VDB Entry, Third Party Advisory, vdb-entry)
github.com/pts/sam2p/issues/38 (Third Party Advisory)
usn.ubuntu.com/4107-1/ (vendor-advisory, Third Party Advisory)
lists.debian.org/debian-lts-announce/2022/12/msg00008.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2018-11490?: CVE-2018-11490 is a high-severity vulnerability in Giflib Project, classified under Improper Validation of Array Index. CVSS score: 8.8/10. Published 2018-05-26.
How severe is CVE-2018-11490?: High severity. CVSS v3 base score is 8.8 out of 10.