Description
The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are vulnerable to buffer overflow. NFSD tracks the number of pages held by each NFSD thread by combining the receive and send buffers of a remote procedure call (RPC) into a single array of pages. A client can force the send buffer to shrink by sending an RPC message over TCP with garbage data added at the end of the message. The RPC message with garbage data is still correctly formed according to the specification and is passed forward to handlers. Vulnerable code in NFSD is not expecting the oversized request and writes beyond the allocated buffer space. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Published: 2022-11-04
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-5730-1 linux security update
EUVD EUVD EUVD-2022-46915 The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are vulnerable to buffer overflow. NFSD tracks the number of pages held by each NFSD thread by combining the receive and send buffers of a remote procedure call (RPC) into a single array of pages. A client can force the send buffer to shrink by sending an RPC message over TCP with garbage data added at the end of the message. The RPC message with garbage data is still correctly formed according to the specification and is passed forward to handlers. Vulnerable code in NFSD is not expecting the oversized request and writes beyond the allocated buffer space. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Ubuntu USN Ubuntu USN USN-5754-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5754-2 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-5755-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5755-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5773-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-5779-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-5789-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-5794-1 Linux kernel (AWS) vulnerabilities
Ubuntu USN Ubuntu USN USN-5802-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5804-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5804-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5808-1 Linux kernel (IBM) vulnerabilities
Ubuntu USN Ubuntu USN USN-5813-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5829-1 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-5830-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5861-1 Linux kernel (Dell300x) vulnerabilities
Ubuntu USN Ubuntu USN USN-5863-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-5875-1 Linux kernel (GKE) vulnerabilities
Ubuntu USN Ubuntu USN USN-5914-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-5918-1 Linux kernel (BlueField) vulnerabilities
History

Wed, 16 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00633}

epss

{'score': 0.00467}


Thu, 01 May 2025 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Subscriptions

Linux Linux Kernel
Netapp Active Iq Unified Manager H300s H300s Firmware H410c H410c Firmware H410s H410s Firmware H500s H500s Firmware H700s H700s Firmware
Redhat Enterprise Linux Rhel Eus
cve-icon MITRE

Status: PUBLISHED

Assigner: SNPS

Published:

Updated: 2025-05-01T19:08:43.378Z

Reserved: 2022-10-26T00:00:00.000Z

Link: CVE-2022-43945

cve-icon Vulnrichment

Updated: 2024-08-03T13:40:06.873Z

cve-icon NVD

Status : Modified

Published: 2022-11-04T19:15:11.180

Modified: 2025-05-01T19:15:55.283

Link: CVE-2022-43945

cve-icon Redhat

Severity : Important

Publid Date: 2022-10-03T09:00:00Z

Links: CVE-2022-43945 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses