Local service interruption via OOB socket leak
Published Oct 17, 2022 · Updated Aug 3, 2024
Memory leak in Linux Kernel before 6.1 allows local users to exhaust memory and interrupt service through Unix-domain socket operations. When paired sockets exchange unconsumed MSG_OOB buffers, each buffer keeps its sender's write-memory reference positive, preventing both socket objects from reaching destruction. The flaw requires local code execution and AF_UNIX OOB support; repeated socket-pair cycles can consume kernel memory until service is denied.
Summary
What happened
Memory leak in Linux Kernel before 6.1 allows local users to exhaust memory and interrupt service through Unix-domain socket operations. When paired sockets exchange unconsumed MSG_OOB buffers, each buffer keeps its sender's write-memory reference positive, preventing both socket objects from reaching destruction. The flaw requires local code execution and AF_UNIX OOB support; repeated socket-pair cycles can consume kernel memory until service is denied.
The record
- CVE
- CVE-2022-3543
- Published
- Oct 17, 2022
- Updated
- Aug 3, 2024
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-401, CWE-404, T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 17, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=n/a
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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