Service interruption via premature CIFS response release
Published Nov 1, 2023 · Updated Feb 27, 2025
Use-after-free in the Linux kernel CIFS client allows remote authenticated users to interrupt service through crafted SMB responses. cifs_demultiplex_thread() wakes a synchronous waiter before marking its response safe, allowing the waiter to release a buffer that the CIFS thread still reads. The race requires an active CIFS connection and interruption of a synchronous request; the bounded consequence is CIFS disruption or denial of service.
Summary
What happened
Use-after-free in the Linux kernel CIFS client allows remote authenticated users to interrupt service through crafted SMB responses. cifs_demultiplex_thread() wakes a synchronous waiter before marking its response safe, allowing the waiter to release a buffer that the CIFS thread still reads. The race requires an active CIFS connection and interruption of a synchronous request; the bounded consequence is CIFS disruption or denial of service.
The record
- CVE
- CVE-2023-1192
- Published
- Nov 1, 2023
- Updated
- Feb 27, 2025
- Vendor
- Red Hat
- Product
- Red Hat Enterprise Linux 8
- Classifications
- CWE-416, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Nov 1, 2023CVE publishedPublication date reported by the CVE source.
- Feb 27, 2025Record updatedLatest update available in the CVE record.
Exploitability
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What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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