{"id":"CVE-2020-24863","aliases":["EUVD-2020-17571","GHSA-qjw3-35px-c96q"],"status":"published","title":"A memory corruption vulnerability was found in the kernel function kern_getfsstat in MidnightBSD...","description":"A memory corruption vulnerability was found in the kernel function kern_getfsstat in MidnightBSD before 1.2.7 and 1.3 through 2020-08-19, and FreeBSD through 11.4, that allows an attacker to trigger an invalid free and crash the system via a crafted size value in conjunction with an invalid mode.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00533,"percentile":0.45357,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2020-09-03T14:34:32Z","modified":"2026-10-24T10:50:04Z","products":[{"vendor":"freebsd","product":"freebsd"},{"vendor":"midnightbsd","product":"midnightbsd"}],"references":[{"url":"https://www.midnightbsd.org/notes/","tags":["x_refsource_MISC","x_transferred","Release Notes","Vendor Advisory","advisory"]},{"url":"https://github.com/MidnightBSD/src/blob/1691c07ff4f27b97220a5d65e217341e477f4014/sys/kern/vfs_syscalls.c","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"http://www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:01.txt","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Vendor Advisory","evidence"]},{"url":"https://www.freebsd.org/security/advisories/FreeBSD-EN-20:18.getfsstat.asc","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-24863"},{"url":"https://github.com/advisories/GHSA-qjw3-35px-c96q"}],"sources":{"cve":[{"id":"CVE-2020-24863","description":"A memory corruption vulnerability was found in the kernel function kern_getfsstat in MidnightBSD before 1.2.7 and 1.3 through 2020-08-19, and FreeBSD through 11.4, that allows an attacker to trigger an invalid free and crash the system via a crafted size value in conjunction with an invalid mode.","status":"published","published":"2020-09-03T14:34:32Z","modified":"2024-08-04T15:19:09.428Z","updated_at":"2026-11-02T14:35:54.468882Z"}],"euvd":[{"id":"EUVD-2020-17571","description":"A memory corruption vulnerability was found in the kernel function kern_getfsstat in MidnightBSD before 1.2.7 and 1.3 through 2020-08-19, and FreeBSD through 11.4, that allows an attacker to trigger an invalid free and crash the system via a crafted size value in conjunction with an invalid mode.","status":"published","published":"2020-09-03T14:34:32Z","modified":"2024-08-04T15:19:09Z","updated_at":"2026-11-03T03:07:19.210308Z"}],"ghsa":[{"id":"GHSA-qjw3-35px-c96q","title":"A memory corruption vulnerability was found in the kernel function kern_getfsstat in MidnightBSD...","description":"A memory corruption vulnerability was found in the kernel function kern_getfsstat in MidnightBSD before 1.2.7 and 1.3 through 2020-08-19, and FreeBSD through 11.4, that allows an attacker to trigger an invalid free and crash the system via a crafted size value in conjunction with an invalid mode.","status":"published","published":"2022-05-24T17:27:19Z","modified":"2023-01-29T05:04:21Z","updated_at":"2026-11-02T14:45:32.201087Z"}],"nvd":[{"id":"CVE-2020-24863","description":"A memory corruption vulnerability was found in the kernel function kern_getfsstat in MidnightBSD before 1.2.7 and 1.3 through 2020-08-19, and FreeBSD through 11.4, that allows an attacker to trigger an invalid free and crash the system via a crafted size value in conjunction with an invalid mode.","status":"published","published":"2020-09-03T15:15:11.52Z","modified":"2026-06-17T03:06:07.037Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.9,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:C","level":"medium","assessor":"primary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:06:13.600965Z"}],"osv":[{"id":"CVE-2020-24863","description":"A memory corruption vulnerability was found in the kernel function kern_getfsstat in MidnightBSD before 1.2.7 and 1.3 through 2020-08-19, and FreeBSD through 11.4, that allows an attacker to trigger an invalid free and crash the system via a crafted size value in conjunction with an invalid mode.","status":"published","published":"2020-09-03T15:15:11.52Z","modified":"2026-10-24T10:50:04.388961894Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:15.879068Z"}]}}