Security readout for executives and security teams
CVE-2021-46828 is a denial-of-service flaw in libtirpc before 1.3.3rc1. A remote, unauthenticated attacker could keep idle TCP connections open until a service using libtirpc exhausts file descriptors and stops accepting new connections. The business impact is service outage, not disclosed data theft or code execution. Exposure is most likely on Linux or Unix systems, appliances, or services using libtirpc versions before 1.3.3rc1, especially network-exposed RPC/NFS-related services. Debian, Debian LTS, Gentoo, and NetApp published advisories. The bundle does not enumerate every affected downstream product. Treat as a high-priority availability risk for exposed infrastructure services. Prioritize internet-facing or business-critical systems first. This is less urgent than confirmed exploited code execution, but unpatched exposure can still create preventable outages. Mitigation focus: Upgrade libtirpc through vendor packages or to a version containing the upstream fix.; Apply Debian DSA-5200, Debian LTS DLA-3071-1, or Gentoo GLSA-202210-33 where applicable.; Review the NetApp advisory if NetApp products are in scope..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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Open ATT&CK lookupCVE-2021-46828 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
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CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- DSA-5200CVE reference · vendor-advisory
- [debian-lts-announce] 20220812 [SECURITY] [DLA 3071-1] libtirpc security updateCVE reference · mailing-list
- https://security.netapp.com/advisory/ntap-20221007-0004/CVE reference
- GLSA-202210-33CVE reference · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Handling of Exceptional Conditions
Improper Handling of Exceptional Conditions represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.