{"id":"CVE-2023-26917","aliases":["AZL-26153","CLSA-2026-1786710499","DEBIAN-CVE-2023-26917","EUVD-2023-30709","GHSA-8fpx-68qp-g9qc","UBUNTU-CVE-2023-26917","USN-7752-1"],"status":"published","title":"libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the...","description":"libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function lysp_stmt_validate_value at lys_parse_mem.c.","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":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00893,"percentile":0.59902,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-476"],"published":"2023-04-11T00:00:00Z","modified":"2026-10-28T02:30:37Z","fixes":[{"ecosystem":"Azure Linux:2","package":"libyang","fixed_in":["2.1.55-1"],"sources":["osv"]},{"ecosystem":"TuxCare:AlmaLinux:9.2","package":"libyang","fixed_in":["2.0.7-2.el9.tuxcare.els1"],"sources":["osv"]},{"ecosystem":"TuxCare:AlmaLinux:9.2","package":"libyang-devel","fixed_in":["2.0.7-2.el9.tuxcare.els1"],"sources":["osv"]},{"ecosystem":"TuxCare:AlmaLinux:9.2","package":"libyang-devel-doc","fixed_in":["2.0.7-2.el9.tuxcare.els1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"libyang","fixed_in":["3.4.2+dfsg-2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"libyang","fixed_in":["3.4.2+dfsg-2"],"sources":["osv"]},{"ecosystem":"Ubuntu:24.04:LTS","package":"libyang2","fixed_in":["2.1.30-2.1ubuntu0.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure Linux:2","package":"libyang","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.55-1"}]}]},{"source":"osv","ecosystem":"TuxCare:AlmaLinux:9.2","package":"libyang","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.7-2.el9.tuxcare.els1"}]}]},{"source":"osv","ecosystem":"TuxCare:AlmaLinux:9.2","package":"libyang-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.7-2.el9.tuxcare.els1"}]}]},{"source":"osv","ecosystem":"TuxCare:AlmaLinux:9.2","package":"libyang-devel-doc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.7-2.el9.tuxcare.els1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"libyang","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.2+dfsg-2"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"libyang","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.2+dfsg-2"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"libyang2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.148-0.1","2.1.148-0.2","2.1.30-2","2.1.30-2.1","2.1.30-2.1~exp1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"libyang2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.30-2.1ubuntu0.1"}]}],"versions":["2.1.30-2","2.1.30-2.1","2.1.30-2.1build1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"libyang2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.30-2.1ubuntu0.1"}]}],"versions":["2.1.30-2","2.1.30-2.1","2.1.30-2.1build1"],"bundled":2}],"products":[{"vendor":"cesnet","product":"libyang"}],"references":[{"url":"https://github.com/CESNET/libyang/issues/1987","tags":["x_transferred","Exploit","Issue Tracking","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-26917","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-8fpx-68qp-g9qc"},{"url":"https://errata.tuxcare.com/els_os/almalinux9.2esu/CLSA-2026-1786710499.html","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/26xxx/CVE-2023-26917.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2023-26917","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-26917","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-26917","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-7752-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-26916","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2023-26917","description":"libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function lysp_stmt_validate_value at lys_parse_mem.c.","status":"published","published":"2023-04-11T00:00:00Z","modified":"2025-02-11T15:52:49.173Z","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-476"],"updated_at":"2026-11-02T14:35:15.434947Z"}],"euvd":[{"id":"EUVD-2023-30709","description":"libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function lysp_stmt_validate_value at lys_parse_mem.c.","status":"published","published":"2023-04-11T00:00:00Z","modified":"2025-02-11T15:52:49Z","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":"2026-11-03T00:03:59.282543Z"}],"ghsa":[{"id":"GHSA-8fpx-68qp-g9qc","title":"libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the...","description":"libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function lysp_stmt_validate_value at lys_parse_mem.c.","status":"published","published":"2023-04-11T12:30:25Z","modified":"2024-04-04T03:24:08Z","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-476"],"updated_at":"2026-11-02T14:56:14.332077Z"}],"nvd":[{"id":"CVE-2023-26917","description":"libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function lysp_stmt_validate_value at lys_parse_mem.c.","status":"published","published":"2023-04-11T12:15:07.657Z","modified":"2026-06-17T05:43:56.49Z","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":"primary"},{"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-476"],"updated_at":"2026-11-02T14:07:53.719171Z"}],"osv":[{"id":"AZL-26153","title":"CVE-2023-26917 affecting package libyang for versions less than 2.1.55-1","description":"libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function lysp_stmt_validate_value at lys_parse_mem.c.","status":"published","published":"2023-04-11T12:15:07Z","modified":"2026-04-21T04:23:28.960206Z","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":"2026-11-02T15:28:03.093433Z"},{"id":"CVE-2023-26917","description":"libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function lysp_stmt_validate_value at lys_parse_mem.c.","status":"published","published":"2023-04-11T00:00:00Z","modified":"2026-10-28T02:30:37.624011637Z","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":"2026-11-02T15:44:31.135751Z"},{"id":"DEBIAN-CVE-2023-26917","description":"libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function lysp_stmt_validate_value at lys_parse_mem.c.","status":"published","published":"2023-04-11T12:15:07.657Z","modified":"2026-10-26T18:00:41.907697691Z","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":"2026-11-02T15:45:39.679062Z"},{"id":"UBUNTU-CVE-2023-26917","description":"libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function lysp_stmt_validate_value at lys_parse_mem.c.","status":"published","published":"2023-04-11T12:15:00Z","modified":"2026-04-22T14:03:55.979012Z","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"},{"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":"2026-11-02T16:54:20.198616Z"},{"id":"CLSA-2026-1786710499","title":"libyang: Fix of CVE-2023-26917","description":"- CVE-2023-26917: fix NULL pointer dereference in lysp_stmt_validate_value() on a\n  missing YANG statement argument","status":"published","published":"2026-08-14T12:28:28Z","modified":"2026-10-26T09:30:35.194937002Z","updated_at":"2026-11-02T15:43:47.20725Z"},{"id":"USN-7752-1","title":"libyang2 vulnerabilities","description":"It was discovered that libyang incorrectly handled certain memory\noperations when parsing YANG strings. An attacker could possibly use this\nissue to cause libyang to crash, resulting in a denial of service.","status":"published","published":"2025-09-16T13:41:30Z","modified":"2026-04-22T11:01:48.149587Z","updated_at":"2026-11-02T16:58:21.91885Z"}]}}