{"id":"CVE-2023-52556","aliases":["EUVD-2023-57180","GHSA-4x2w-rqr8-f75m"],"status":"published","title":"OpenBSD 7.4 pf state race condition kernel crash","description":"In OpenBSD 7.4 before errata 009, a race condition between pf(4)'s processing of packets and expiration of packet states may cause a kernel panic.","severity":{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-12","score":0.00143,"percentile":0.03639,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-367"],"published":"2024-03-01T16:08:49Z","modified":"2026-10-28T10:36:18Z","products":[{"vendor":"openbsd","product":"openbsd"}],"references":[{"url":"https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/009_pf.patch.sig","tags":["x_transferred","Patch","web"]},{"url":"https://github.com/openbsd/src/commit/9d9f4dc6c833cb79d13f836581e3a781d06842e7","tags":["x_transferred","Patch","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52556","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4x2w-rqr8-f75m"},{"url":"https://github.com/openbsd/src/","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52556.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-52556","title":"OpenBSD 7.4 pf state race condition kernel crash","description":"In OpenBSD 7.4 before errata 009, a race condition between pf(4)'s processing of packets and expiration of packet states may cause a kernel panic.\n","status":"published","published":"2024-03-01T16:08:49.203Z","modified":"2024-11-14T19:47:00.394Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"adp"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T14:35:18.88314Z"}],"euvd":[{"id":"EUVD-2023-57180","description":"In OpenBSD 7.4 before errata 009, a race condition between pf(4)'s processing of packets and expiration of packet states may cause a kernel panic.\n","status":"published","published":"2024-03-01T16:08:49Z","modified":"2024-11-14T19:47:00Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T00:04:59.953537Z"}],"ghsa":[{"id":"GHSA-4x2w-rqr8-f75m","title":"In OpenBSD 7.4 before errata 009, a race condition between pf(4)'s processing of packets and...","description":"In OpenBSD 7.4 before errata 009, a race condition between pf(4)'s processing of packets and expiration of packet states may cause a kernel panic.\n","status":"published","published":"2024-03-01T18:30:24Z","modified":"2026-03-17T05:03:43Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T15:06:39.944141Z"}],"nvd":[{"id":"CVE-2023-52556","description":"In OpenBSD 7.4 before errata 009, a race condition between pf(4)'s processing of packets and expiration of packet states may cause a kernel panic.\n","status":"published","published":"2024-03-01T17:15:07.177Z","modified":"2026-06-17T06:43:00.98Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T14:09:07.077422Z"}],"osv":[{"id":"CVE-2023-52556","title":"OpenBSD 7.4 pf state race condition kernel crash","description":"In OpenBSD 7.4 before errata 009, a race condition between pf(4)'s processing of packets and expiration of packet states may cause a kernel panic.\n","status":"published","published":"2024-03-01T16:08:49.203Z","modified":"2026-10-28T10:36:18.970908804Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-367"],"updated_at":"2026-11-02T15:44:35.245372Z"}]}}