{"id":"CVE-2011-2521","aliases":["EUVD-2011-2506","GHSA-xr3h-hfcp-qxhf","RHSA-2011:1350"],"status":"published","title":"The x86_assign_hw_event function in arch/x86/kernel/cpu/perf_event.c in the Performance Events...","description":"The x86_assign_hw_event function in arch/x86/kernel/cpu/perf_event.c in the Performance Events subsystem in the Linux kernel before 2.6.39 does not properly calculate counter values, which allows local users to cause a denial of service (panic) via the perf program.","severity":{"version":"2.0","score":4.9,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:C","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00392,"percentile":0.33615,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-189"],"published":"2012-05-24T23:00:00Z","modified":"2026-06-28T10:05:18Z","affected":[{"source":"osv","ecosystem":"Red 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