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Vulnerability record · CVE-2021-46828 · published 20 July 2022

CVE-2021-46828: Libtirpc project libtirpc vulnerability

LLibtirpc Project · Libtirpc

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 connections.

7.5 CVSS 3.1 High EPSS 2.8% · top 14.2% CWE-755 · CWE-755CWE-835 · CWE-835
7.5CVSS 3.1 base score
2.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

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 connections.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://git.linux-nfs.org/?p=steved/libtirpc.git%3Ba=commit%3Bh=86529758570cef4c73fb9b9c4104fdc510f701ed
https://lists.debian.org/debian-lts-announce/2022/08/msg00004.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202210-33 Third Party Advisory
https://security.netapp.com/advisory/ntap-20221007-0004/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5200 Third Party Advisory
http://git.linux-nfs.org/?p=steved/libtirpc.git%3Ba=commit%3Bh=86529758570cef4c73fb9b9c4104fdc510f701ed
https://lists.debian.org/debian-lts-announce/2022/08/msg00004.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202210-33 Third Party Advisory
https://security.netapp.com/advisory/ntap-20221007-0004/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5200 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-46828), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.