{"id":"CVE-2023-52558","aliases":["EUVD-2023-57182","GHSA-4cg8-w873-pfqx"],"status":"published","title":"OpenBSD 7.4 and 7.3 m_split() network buffer kernel crash","description":"In OpenBSD 7.4 before errata 002 and OpenBSD 7.3 before errata 019, a network buffer that had to be split at certain length that could crash the kernel after receiving specially crafted escape sequences.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00702,"percentile":0.53684,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-131"],"published":"2024-03-01T16:33:06Z","modified":"2026-10-28T10:36:16Z","products":[{"vendor":"openbsd","product":"openbsd"}],"references":[{"url":"https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/002_msplit.patch.sig","tags":["x_transferred","Patch","web"]},{"url":"https://ftp.openbsd.org/pub/OpenBSD/patches/7.3/common/019_msplit.patch.sig","tags":["x_transferred","Patch","web"]},{"url":"https://github.com/openbsd/src/commit/7b4d35e0a60ba1dd4daf4b1c2932020a22463a89","tags":["x_transferred","Patch","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52558","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4cg8-w873-pfqx"},{"url":"https://github.com/openbsd/src/","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52558.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-52558","title":"OpenBSD 7.4 and 7.3 m_split() network buffer kernel crash","description":"In OpenBSD 7.4 before errata 002 and OpenBSD 7.3 before errata 019, a network buffer that had to be split at certain length that could crash the kernel after receiving specially crafted escape sequences.","status":"published","published":"2024-03-01T16:33:06.604Z","modified":"2024-11-19T21:42:52.858Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-131"],"updated_at":"2026-11-02T14:35:18.508816Z"}],"euvd":[{"id":"EUVD-2023-57182","description":"In OpenBSD 7.4 before errata 002 and OpenBSD 7.3 before errata 019, a network buffer that had to be split at certain length that could crash the kernel after receiving specially crafted escape sequences.","status":"published","published":"2024-03-01T16:33:06Z","modified":"2024-11-19T21:42:52Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T00:04:54.7374Z"}],"ghsa":[{"id":"GHSA-4cg8-w873-pfqx","title":"In OpenBSD 7.4 before errata 002 and OpenBSD 7.3 before errata 019, a network buffer that had to...","description":"In OpenBSD 7.4 before errata 002 and OpenBSD 7.3 before errata 019, a network buffer that had to be split at certain length that could crash the kernel after receiving specially crafted escape sequences.","status":"published","published":"2024-03-01T18:30:25Z","modified":"2026-03-23T05:09:23Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-131"],"updated_at":"2026-11-02T15:06:47.740951Z"}],"nvd":[{"id":"CVE-2023-52558","description":"In OpenBSD 7.4 before errata 002 and OpenBSD 7.3 before errata 019, a network buffer that had to be split at certain length that could crash the kernel after receiving specially crafted escape sequences.","status":"published","published":"2024-03-01T17:15:07.33Z","modified":"2026-06-17T06:43:01.303Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-131"],"updated_at":"2026-11-02T14:09:07.077422Z"}],"osv":[{"id":"CVE-2023-52558","title":"OpenBSD 7.4 and 7.3 m_split() network buffer kernel crash","description":"In OpenBSD 7.4 before errata 002 and OpenBSD 7.3 before errata 019, a network buffer that had to be split at certain length that could crash the kernel after receiving specially crafted escape sequences.","status":"published","published":"2024-03-01T16:33:06.604Z","modified":"2026-10-28T10:36:16.140405307Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-131"],"updated_at":"2026-11-02T15:44:35.245372Z"}]}}