{"cve":"CVE-2011-2491","nvd":{"published":"2013-03-01T12:37:53.757","modified":"2026-06-16T23:31:26.673","status":"Modified","description":"The Network Lock Manager (NLM) protocol implementation in the NFS client functionality in the Linux kernel before 3.0 allows local users to cause a denial of service (system hang) via a LOCK_UN flock system call.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-400"],"references":["http://ftp.osuosl.org/pub/linux/kernel/v3.0/ChangeLog-3.0","http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0b760113a3a155269a3fba93a409c640031dd68f","http://rhn.redhat.com/errata/RHSA-2011-1212.html","http://www.openwall.com/lists/oss-security/2011/06/23/6","https://bugzilla.redhat.com/show_bug.cgi?id=709393"],"products":["linux:linux_kernel","redhat:enterprise_linux_desktop","redhat:enterprise_linux_server","redhat:enterprise_linux_workstation"],"source":"nvd","synced_at":"2026-10-19T20:27:27.940201468+00:00"},"epss":{"cve":"CVE-2011-2491","score":0.00399,"percentile":0.34171,"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."]}