{"id":"CVE-2023-23455","title":"atm_tc_enqueue in net/sched/sch_atm.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service because of type confusion (non-negative numbers can sometimes indicate a TC_ACT_SHOT condition rather than valid classi…","summary":"atm_tc_enqueue in net/sched/sch_atm.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service because of type confusion (non-negative numbers can sometimes indicate a TC_ACT_SHOT condition rather than valid classi…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-843","CWE-843"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 2.6.12, <= 6.1.4","debian_linux = 11.0"],"published":"2023-01-12","updated":"2026-10-14","sourceUpdated":"2026-10-14T23:17:13.643","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-23455","references":[{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a2965c7be0522eaa18808684b7b82b248515511b","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2023/03/msg00000.html","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html","label":"cve@mitre.org"},{"url":"https://www.debian.org/security/2023/dsa-5324","label":"cve@mitre.org"},{"url":"https://www.openwall.com/lists/oss-security/2023/01/10/1","label":"cve@mitre.org"},{"url":"https://www.openwall.com/lists/oss-security/2023/01/10/4","label":"cve@mitre.org"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a2965c7be0522eaa18808684b7b82b248515511b","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2023/03/msg00000.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2023/dsa-5324","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.openwall.com/lists/oss-security/2023/01/10/1","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.openwall.com/lists/oss-security/2023/01/10/4","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-769027.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-794697.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd"],"epss":0.00272,"epssPercentile":0.18209,"ingestedAt":"2026-10-15T00:02:07.125Z","slug":"CVE-2023-23455","body":"## Overview\n\natm_tc_enqueue in net/sched/sch_atm.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service because of type confusion (non-negative numbers can sometimes indicate a TC_ACT_SHOT condition rather than valid classification results).\n\n## Affected\n\n- `linux_kernel >= 2.6.12, <= 6.1.4`\n- `debian_linux = 11.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}