{"cve":"CVE-2009-4021","nvd":{"published":"2009-11-25T16:30:00.843","modified":"2026-06-16T23:12:50.867","status":"Modified","description":"The fuse_direct_io function in fs/fuse/file.c in the fuse subsystem in the Linux kernel before 2.6.32-rc7 might allow attackers to cause a denial of service (invalid pointer dereference and OOPS) via vectors possibly related to a memory-consumption attack.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-399"],"references":["http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f60311d5f7670d9539b424e4ed8b5c0872fc9e83","http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00002.html","http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00005.html","http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.html","http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.html"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T19:54:26.868835795+00:00"},"epss":{"cve":"CVE-2009-4021","score":0.00411,"percentile":0.35424,"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."]}