Security readout for executives and security teams
Plain-English summary
A Linux kernel class registration error path can leave a freed lockdep key registered. Later lockdep activity can touch freed memory and crash or corrupt kernel state. The report says this only occurs when lockdep is enabled, which is not typical for normal production systems.
Executive priority
Treat this as low urgency for typical production fleets, but patch through normal kernel maintenance. Raise priority for debugging, lab, appliance, or custom-kernel environments where lockdep is enabled or third-party drivers are frequently loaded.
Technical view
class_register() could free subsys_private after kset_register failure while its lock_class_key remained in lock_keys_hash. Later iteration or registration could hit stale memory. The upstream fix unregisters the lock_class_key before kfree(cp). The triggering example was duplicate /class/xxx creation during module load with KASAN reporting invalid access.
Likely exposure
Exposure appears limited to Linux kernels with lockdep enabled and a class_register() failure path, such as duplicate class names during driver or module registration. Normal production systems are likely less exposed because the source notes lockdep is not normally enabled.
Exploitation context
No source in the bundle reports active exploitation, and the CVE is not marked KEV. The available evidence describes a kernel debugging configuration issue observed through KASAN during module load, not a public exploitation path.
Researcher notes
The key constraint is lockdep. The CVE text explicitly says normal systems usually do not enable it. Affected version data in the bundle is sparse, so rely on vendor advisories and the three stable commits for precise patch mapping.
Mitigation direction
- Prioritize vendor kernel updates that include the referenced stable commits.
- Check distribution advisories for backported fixes matching CVE-2023-52468.
- Avoid enabling lockdep on production kernels unless operationally required.
- Review custom drivers for duplicate class registration behavior.
Validation and detection
- Inventory Linux kernel versions and distribution patch levels.
- Confirm whether production kernels are built with lockdep enabled.
- Check vendor changelogs for the referenced class_register() fix.
- Review crash logs for KASAN or lockdep reports around class_register().
Public sources used
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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CVE-2023-52468 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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SSVC decision data
Vulnerability timeline
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- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/b57196a5ec5e4c0ffecde8348b085b778c7dce04CVE reference, Linux
- https://git.kernel.org/stable/c/0f1486dafca3398c4c46b9f6e6452fa27e73b559CVE reference, Linux
- https://git.kernel.org/stable/c/93ec4a3b76404bce01bd5c9032bef5df6feb1d62CVE reference, Linux
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.