{"id":"CVE-2021-33640","state":"PUBLISHED","title":"After tar_close(), libtar.c releases the memory pointed to by pointer t. After tar_close() is called in the list() function, it continues to use pointer t: free_longlink_longname(t","description":"After tar_close(), libtar.c releases the memory pointed to by pointer t. After tar_close() is called in the list() function, it continues to use pointer t: free_longlink_longname(t->th_buf) . As a result, the released memory is used (use-after-free).","publishedAt":"2022-12-19T00:00:00.000Z","updatedAt":"2025-04-17T14:58:03.494Z","severity":{"score":6.2,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"openEuler"},"assigner":"openEuler","products":["openEuler openEuler 22.03 LTS","openEuler openEuler 20.03 LTS SP1","openEuler openEuler 20.03 LTS SP3"],"affected":[{"vendor":"openEuler","product":"openEuler 22.03 LTS","versions":[{"version":" libtar 1.2.20-21","status":"affected"}]},{"vendor":"openEuler","product":"openEuler 20.03 LTS SP1","versions":[{"version":" libtar 1.2.20-19","status":"affected"}]},{"vendor":"openEuler","product":"openEuler 20.03 LTS SP3","versions":[{"version":" libtar 1.2.20-19","status":"affected"}]}],"references":["https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2021-33640&packageName=libtar","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S4PJRCJLEAWN2EKXGLSOBTL7O57V7NC/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7WX5YE66CT7Y5C2HTHXSFDKQWYWYWJ2T/"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-29T19:48:36.050Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/33xxx/CVE-2021-33640.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-33640","state":"PUBLISHED","datePublished":"2022-12-19T00:00:00.000Z","dateUpdated":"2025-04-17T14:58:03.494Z","assignerShortName":"openEuler","assignerOrgId":"7e1ac599-2767-43fa-b3ea-f10178cc98f2","dateReserved":"2021-05-28T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"After tar_close(), libtar.c releases the memory pointed to by pointer t. 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