{"id":"CVE-2021-46828","title":"In libtirpc before 1.3.3rc1, remote attackers could exhaust the file descriptors of a process that uses libtirpc because idle TCP connections are mishandled","summary":"In libtirpc before 1.3.3rc1, remote attackers could exhaust the file descriptors of a process that uses libtirpc because idle TCP connections are mishandled. This can, in turn, lead to an svc_run infinite loop without accepting new conne…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-755","CWE-835"],"vendor":"libtirpc_project","product":"libtirpc","affected":["libtirpc < 1.3.3","debian_linux = 10.0","debian_linux = 11.0"],"patched":["libtirpc 1.3.3"],"published":"2022-07-20","updated":"2026-10-14","sourceUpdated":"2026-10-14T13:17:12.797","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-46828","references":[{"url":"http://git.linux-nfs.org/?p=steved/libtirpc.git%3Ba=commit%3Bh=86529758570cef4c73fb9b9c4104fdc510f701ed","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2022/08/msg00004.html","label":"cve@mitre.org"},{"url":"https://security.gentoo.org/glsa/202210-33","label":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20221007-0004/","label":"cve@mitre.org"},{"url":"https://www.debian.org/security/2022/dsa-5200","label":"cve@mitre.org"},{"url":"http://git.linux-nfs.org/?p=steved/libtirpc.git%3Ba=commit%3Bh=86529758570cef4c73fb9b9c4104fdc510f701ed","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2022/08/msg00004.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/202210-33","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20221007-0004/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2022/dsa-5200","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-398330.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-558014.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-561322.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.03204,"epssPercentile":0.87941,"ingestedAt":"2026-10-14T13:30:58.415Z","ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2025-04-23T13:27:08.884158Z"},"slug":"CVE-2021-46828","body":"## Overview\n\nIn libtirpc before 1.3.3rc1, remote attackers could exhaust the file descriptors of a process that uses libtirpc because idle TCP connections are mishandled. This can, in turn, lead to an svc_run infinite loop without accepting new connections.\n\n## Affected\n\n- `libtirpc < 1.3.3`\n- `debian_linux = 10.0`\n- `debian_linux = 11.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `libtirpc 1.3.3`","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":41.3,"likelihood":0.6,"exploitation":0,"ransomware":0},"changes":[]}