What is CVE-2018-11489?

CVE-2018-11489 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-2018-11489?

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

Buffer overflow in Giflib Project

CVE-2018-11489

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 CrntCode 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: 0.025 (84.3th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.026 · newest: 0.025 · change: -0.001

Affected products

Giflib Project
Sam2p Project — versions 0.49.4

Weakness classification (CWE)

References

www.securityfocus.com/bid/104341 (VDB Entry, Third Party Advisory, vdb-entry)
github.com/pts/sam2p/issues/37 (Exploit, Third Party Advisory, Issue Tracking)
lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac… (mailing-list)

Frequently asked questions

What is CVE-2018-11489?: CVE-2018-11489 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-2018-11489?: High severity. CVSS v3 base score is 8.8 out of 10.