{"cve":"CVE-2009-3978","nvd":{"published":"2009-11-19T00:30:00.280","modified":"2026-06-16T23:12:44.827","status":"Modified","description":"The nsGIFDecoder2::GifWrite function in decoders/gif/nsGIFDecoder2.cpp in libpr0n in Mozilla Firefox before 3.5.5 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an animated GIF file with a large image size, a different vulnerability than CVE-2009-3373.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://hg.mozilla.org/releases/mozilla-1.9.1/rev/edf189567edc","http://www.h-online.com/open/news/item/Mozilla-fixes-critical-bugs-with-Firefox-3-5-5-852070.html","http://www.mozilla.com/en-US/firefox/3.5.5/releasenotes/","https://bugzilla.mozilla.org/show_bug.cgi?id=525326","https://wiki.mozilla.org/Releases/Firefox_3.5.5/Test_Plan"],"products":["mozilla:firefox"],"source":"nvd","synced_at":"2026-10-19T19:54:26.868835795+00:00"},"epss":{"cve":"CVE-2009-3978","score":0.01788,"percentile":0.78344,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}