What is CVE-2009-0749?

CVE-2009-0749 is a high-severity vulnerability in Optipng Project, classified under Use After Free. CVSS score: 7.8/10. Published 2009-03-02.

How severe is CVE-2009-0749?

High severity. CVSS v3 base score is 7.8 out of 10.

Use After Free in Optipng Project

CVE-2009-0749

Use-after-free vulnerability in the GIFReadNextExtension function in lib/pngxtern/gif/gifread.c in OptiPNG 0.6.2 and earlier allows context-dependent attackers to cause a denial of service (application crash) via a crafted GIF image that causes the realloc function to return a new pointer, which triggers memory corruption when the old pointer is accessed.

Vulnerability class: Use-After-Free

Published 2009-03-02 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (74.1th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-416 — Use After Free

References

secunia.com/advisories/34201 (Broken Link, third-party-advisory)
secunia.com/advisories/34259 (Broken Link, third-party-advisory)
secunia.com/advisories/34035 (Broken Link, Vendor Advisory, third-party-advisory)
www.securityfocus.com/bid/33873 (Patch, VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
lists.opensuse.org/opensuse-security-announce/2009-03/msg00001.html (vendor-advisory, Mailing List)
www.vupen.com/english/advisories/2009/0510 (Patch, vdb-entry, Broken Link, Vendor Advisory)
optipng.sourceforge.net (Product)
sourceforge.net/tracker/index.php (Issue Tracking)
secunia.com/advisories/35685 (Broken Link, third-party-advisory)
lists.opensuse.org/opensuse-security-announce/2009-07/msg00002.html (vendor-advisory, Mailing List)

Frequently asked questions

What is CVE-2009-0749?: CVE-2009-0749 is a high-severity vulnerability in Optipng Project, classified under Use After Free. CVSS score: 7.8/10. Published 2009-03-02.
How severe is CVE-2009-0749?: High severity. CVSS v3 base score is 7.8 out of 10.