---
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'
---

## Overview

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.

## Affected

- `libtirpc < 1.3.3`
- `debian_linux = 10.0`
- `debian_linux = 11.0`

## Remediation

Upgrade past the affected range:

- `libtirpc 1.3.3`