{"id":"CVE-2020-21047","title":"The libcpu component which is used by libasm of elfutils version 0.177 (git 47780c9e), suffers from denial-of-service vulnerability caused by application crashes due to out-of-bounds write (CWE-787), off-by-one error (CWE-193) and reacha…","summary":"The libcpu component which is used by libasm of elfutils version 0.177 (git 47780c9e), suffers from denial-of-service vulnerability caused by application crashes due to out-of-bounds write (CWE-787), off-by-one error (CWE-193) and reacha…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-787"],"vendor":"elfutils_project","product":"elfutils","affected":["elfutils = 0.177"],"published":"2023-08-22","updated":"2026-10-14","sourceUpdated":"2026-10-14T10:17:31.970","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2020-21047","references":[{"url":"https://lists.debian.org/debian-lts-announce/2023/09/msg00026.html","label":"cve@mitre.org"},{"url":"https://sourceware.org/bugzilla/show_bug.cgi?id=25068","label":"cve@mitre.org"},{"url":"https://sourceware.org/git/?p=elfutils.git%3Ba=commitdiff%3Bh=99dc63b10b3878616b85df2dfd2e4e7103e414b8","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2023/09/msg00026.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://sourceware.org/bugzilla/show_bug.cgi?id=25068","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://sourceware.org/git/?p=elfutils.git%3Ba=commitdiff%3Bh=99dc63b10b3878616b85df2dfd2e4e7103e414b8","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-202008.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-398330.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00251,"epssPercentile":0.1534,"ingestedAt":"2026-10-14T10:25:41.197Z","exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2024-10-07T15:40:52.075327Z"},"slug":"CVE-2020-21047","body":"## Overview\n\nThe libcpu component which is used by libasm of elfutils version 0.177 (git 47780c9e), suffers from denial-of-service vulnerability caused by application crashes due to out-of-bounds write (CWE-787), off-by-one error (CWE-193) and reachable assertion (CWE-617); to exploit the vulnerability, the attackers need to craft certain ELF files which bypass the missing bound checks.\n\n## Affected\n\n- `elfutils = 0.177`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":30.3,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":221245,"id":"CVE-2020-21047","ts":1792030896300,"field":"exploit_available","old":"false","new":"true"}]}