What’s Vulnerable › Vulnerabilities

CVE-2021-46828

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-07-20 · updated 2026-10-14
• Weakness: CWE-755

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.

Affected products

• Debian Linux: 10.0, 11.0
• [UNKNOWN] libtirpc: before 1.3.3 — fixed in 1.3.3

How to fix

Upgrade to a fixed version: [UNKNOWN] libtirpc 1.3.3. Check the vendor advisory for mitigations.

References

• http://git.linux-nfs.org/?p=steved/libtirpc.git%3Ba=commit%3Bh=86529758570cef4c73fb9b9c4104fdc510f701ed
• https://lists.debian.org/debian-lts-announce/2022/08/msg00004.html
• https://security.gentoo.org/glsa/202210-33
• https://security.netapp.com/advisory/ntap-20221007-0004/
• https://www.debian.org/security/2022/dsa-5200
• http://git.linux-nfs.org/?p=steved/libtirpc.git%3Ba=commit%3Bh=86529758570cef4c73fb9b9c4104fdc510f701ed
• https://lists.debian.org/debian-lts-announce/2022/08/msg00004.html
• https://security.gentoo.org/glsa/202210-33
• https://security.netapp.com/advisory/ntap-20221007-0004/
• https://www.debian.org/security/2022/dsa-5200
• https://cert-portal.siemens.com/productcert/html/ssa-398330.html
• https://cert-portal.siemens.com/productcert/html/ssa-558014.html

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