{"id":"CVE-2026-122056","aliases":["DEBIAN-CVE-2026-122056","EUVD-2026-120416","GHSA-qvvp-v7hp-wr62","UBUNTU-CVE-2026-122056"],"status":"published","title":"Openscap: one-byte heap buffer overflow in sds-compose may lead to denial-of-service","description":"A flaw was found in OpenSCAP. A heap-based buffer overflow can occur when processing a specially crafted Extensible Configuration Checklist Description Format (XCCDF) document using the sds-compose option. An attacker could exploit this vulnerability to corrupt memory, resulting in an application crash and a Denial of Service (DoS).","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00322,"percentile":0.25513,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-787"],"published":"2026-11-09T20:33:16Z","modified":"2026-11-11T21:32:55Z","exploits":[{"source":"pocgithub","id":"D7EAD/CVE-2026-122056","title":"D7EAD/CVE-2026-122056","date":"2026-11-09","url":"https://github.com/D7EAD/CVE-2026-122056"}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"openscap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.10+dfsg-1","1.3.10+dfsg-2","1.3.10+dfsg-3","1.3.7+dfsg-1","1.3.7+dfsg-1+deb12u1","1.3.8+dfsg-1","1.3.8+dfsg-2","1.3.8+dfsg-3","1.3.9+dfsg-1","1.3.9+dfsg-1.1","1.3.9+dfsg-1.1~exp1","1.3.9+dfsg-2","1.4.0+dfsg-1","1.4.0+dfsg-2","1.4.1+dfsg-1","1.4.2+dfsg-1","1.4.2+dfsg-2","1.4.3+dfsg-1","1.4.4+dfsg-1","1.4.4+dfsg-2","1.4.5+dfsg-1","1.4.6+dfsg-1"]},{"source":"osv","ecosystem":"Debian:13","package":"openscap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.2+dfsg-1","1.4.2+dfsg-2","1.4.3+dfsg-1","1.4.4+dfsg-1","1.4.4+dfsg-2","1.4.5+dfsg-1","1.4.6+dfsg-1"]},{"source":"osv","ecosystem":"Debian:14","package":"openscap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.2+dfsg-1","1.4.2+dfsg-2","1.4.3+dfsg-1","1.4.4+dfsg-1","1.4.4+dfsg-2","1.4.5+dfsg-1","1.4.6+dfsg-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"openscap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.3-1build2","1.2.7-1","1.2.7-1build1","1.2.8-1","1.2.8-1ubuntu0.1","1.2.8-1ubuntu0.2","1.2.8-1ubuntu0.3","1.2.8-1ubuntu03+esm2","1.2.8-1ubuntu03+esm3"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"openscap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.14-1build1","1.2.15-1","1.2.15-1build1","1.2.15-1ubuntu0.1","1.2.15-1ubuntu0.2","1.2.15-1ubuntu0.3","1.2.15-1ubuntu0.4"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"openscap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.16-2ubuntu1","1.2.16-2ubuntu2","1.2.16-2ubuntu3","1.2.16-2ubuntu3.1","1.2.16-2ubuntu3.2","1.2.16-2ubuntu3.3","1.2.16-2ubuntu3.4"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"openscap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.17-0.1ubuntu5","1.2.17-0.1ubuntu7","1.2.17-0.1ubuntu7.22.04.1","1.2.17-0.1ubuntu7.22.04.2","1.2.17-0.1ubuntu7.22.04.3"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"openscap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.8+dfsg-3","1.3.9+dfsg-1","1.3.9+dfsg-1build1","1.3.9+dfsg-1build2","1.3.9+dfsg-1.1ubuntu1","1.3.9+dfsg-1.1ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"openscap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.3+dfsg-1build1","1.4.4+dfsg-1","1.4.4+dfsg-1ubuntu1","1.4.4+dfsg-1ubuntu2","1.4.4+dfsg-2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"openscap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.2+dfsg-2","1.4.2+dfsg-2build1","1.4.3+dfsg-1","1.4.3+dfsg-1build1","1.4.3+dfsg-1ubuntu1"]}],"products":[{"vendor":"red hat","product":"red hat enterprise linux 10"},{"vendor":"red hat","product":"red hat enterprise linux 6"},{"vendor":"red hat","product":"red hat enterprise linux 7"},{"vendor":"red hat","product":"red hat enterprise linux 8"},{"vendor":"red hat","product":"red hat enterprise linux 9"},{"vendor":"red hat","product":"red hat hardened images"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-122056","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2567100","tags":["issue-tracking","x_refsource_REDHAT"]},{"url":"https://github.com/OpenSCAP/openscap/security/advisories/GHSA-5h6x-q65w-wxvf"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-122056"},{"url":"https://github.com/advisories/GHSA-qvvp-v7hp-wr62"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-122056","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-122056","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-122056","tags":["report"]},{"url":"access.redhat.com/downloads/content/package-browser","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-122056","title":"Openscap: one-byte heap buffer overflow in sds-compose may lead to denial-of-service","description":"A flaw was found in OpenSCAP. A heap-based buffer overflow can occur when processing a specially crafted Extensible Configuration Checklist Description Format (XCCDF) document using the sds-compose option. An attacker could exploit this vulnerability to corrupt memory, resulting in an application crash and a Denial of Service (DoS).","status":"published","published":"2026-11-09T20:33:16.401Z","modified":"2026-11-11T20:59:28.541Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-787"],"updated_at":"2026-11-11T21:33:02.552103Z"}],"euvd":[{"id":"EUVD-2026-120416","description":"A flaw was found in OpenSCAP. A heap-based buffer overflow can occur when processing a specially crafted Extensible Configuration Checklist Description Format (XCCDF) document using the sds-compose option. An attacker could exploit this vulnerability to corrupt memory, resulting in an application crash and a Denial of Service (DoS).","status":"published","published":"2026-11-09T20:33:16Z","modified":"2026-11-11T20:59:28Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium"}],"updated_at":"2026-11-11T22:30:44.772424Z"}],"ghsa":[{"id":"GHSA-qvvp-v7hp-wr62","title":"A flaw was found in OpenSCAP. A heap-based buffer overflow can occur when processing a specially...","description":"A flaw was found in OpenSCAP. A heap-based buffer overflow can occur when processing a specially crafted Extensible Configuration Checklist Description Format (XCCDF) document using the sds-compose option. An attacker could exploit this vulnerability to corrupt memory, resulting in an application crash and a Denial of Service (DoS).","status":"published","published":"2026-11-10T00:31:38Z","modified":"2026-11-11T21:32:55Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium"}],"cwes":["CWE-787"],"updated_at":"2026-11-11T21:36:27.876473Z"}],"nvd":[{"id":"CVE-2026-122056","description":"A flaw was found in OpenSCAP. A heap-based buffer overflow can occur when processing a specially crafted Extensible Configuration Checklist Description Format (XCCDF) document using the sds-compose option. An attacker could exploit this vulnerability to corrupt memory, resulting in an application crash and a Denial of Service (DoS).","status":"published","published":"2026-11-09T22:18:34.163Z","modified":"2026-11-11T21:16:42.377Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-11T23:26:40.822255Z"}],"osv":[{"id":"DEBIAN-CVE-2026-122056","description":"A flaw was found in OpenSCAP. A heap-based buffer overflow can occur when processing a specially crafted Extensible Configuration Checklist Description Format (XCCDF) document using the sds-compose option. An attacker could exploit this vulnerability to corrupt memory, resulting in an application crash and a Denial of Service (DoS).","status":"published","published":"2026-11-09T22:18:34.163Z","modified":"2026-11-12T09:47:38.843887137Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium"}],"updated_at":"2026-11-10T16:33:22.61896Z"},{"id":"UBUNTU-CVE-2026-122056","description":"A flaw was found in OpenSCAP. A heap-based buffer overflow can occur when processing a specially crafted Extensible Configuration Checklist Description Format (XCCDF) document using the sds-compose option. An attacker could exploit this vulnerability to corrupt memory, resulting in an application crash and a Denial of Service (DoS).","status":"published","published":"2026-11-10T00:00:00Z","modified":"2026-11-12T17:25:21.368477447Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H","level":"medium"}],"updated_at":"2026-11-12T18:05:20.870791Z"}]}}