Service interruption via ring-buffer resize race
Published Oct 22, 2025 · Updated Oct 22, 2025
Denial of service in affected Linux kernel versions allows local users to trigger a kernel oops through concurrent tracing changes. During ring_buffer_resize, ring_buffer_swap_cpu can replace a per-CPU buffer after update work is queued, so completion state is read from a different buffer and later page updates dereference invalid state. Exploitation requires local access to tracing controls and winning a timing race between buffer resizing and tracer changes; the demonstrated consequence is a kernel oops and service interruption.
Summary
What happened
Denial of service in affected Linux kernel versions allows local users to trigger a kernel oops through concurrent tracing changes. During ring_buffer_resize, ring_buffer_swap_cpu can replace a per-CPU buffer after update work is queued, so completion state is read from a different buffer and later page updates dereference invalid state. Exploitation requires local access to tracing controls and winning a timing race between buffer resizing and tracer changes; the demonstrated consequence is a kernel oops and service interruption.
The record
- CVE
- CVE-2023-53718
- Published
- Oct 22, 2025
- Updated
- Oct 22, 2025
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 22, 2025CVE publishedPublication date reported by the CVE source.
- Oct 22, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <02e52d7daaa3f0f48819f198092cf4871065bbf7
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <128c06a34cfe55212632533a706b050d54552741
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <49b830d75f03d5dd41146d10e4d3e2a8211c4b94
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <66a3b2a121386702663065d5c9e5a33c03d3f4a2
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8a96c0288d0737ad77882024974c075345c72011
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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
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Technologies
Your stack
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Your stack
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