In the Linux kernel, the following vulnerability has been resolved: debugobjects: Do not fill_pool() if pi_blocked_on On RT enabled kernels,… (CVE-2026-53327)
A vulnerability in the Linux kernel related to the debugobjects subsystem has been resolved. The issue occurs on real-time (RT) enabled kernels where the fill_pool() function calls rtlock_lock(), which asserts if the current task's pi_blocked_on field is set. This condition can corrupt the priority inheritance chain because a task can only block on one lock. The fix prevents fill_pool() from executing when pi_blocked_on is set, avoiding this assertion failure.
AI Analysis
Technical Summary
The vulnerability in the Linux kernel's debugobjects subsystem affects RT enabled kernels. Specifically, fill_pool() calls rtlock_lock(), which triggers an assertion failure if current::pi_blocked_on is set, as a task can only block on one lock to maintain priority inheritance integrity. The patch expands the conditional logic to check current::pi_blocked_on before calling fill_pool(), preventing the assertion and potential corruption of the priority inheritance chain.
Potential Impact
This vulnerability can cause an assertion failure leading to a denial of service (kernel crash) on RT enabled Linux kernels. There is no indication of confidentiality or integrity impact. The denial of service impact is rated as high in the CVSS vector, but overall severity is medium.
Mitigation Recommendations
A fix has been implemented to prevent fill_pool() from being called when current::pi_blocked_on is set. Users should apply the official kernel updates that include this patch. Since this is a kernel-level issue, updating to the fixed kernel version is the recommended remediation. Patch status is not explicitly confirmed in the provided data; verify with the vendor or distribution advisory for the exact fixed version and update accordingly.
In the Linux kernel, the following vulnerability has been resolved: debugobjects: Do not fill_pool() if pi_blocked_on On RT enabled kernels,… (CVE-2026-53327)
Description
A vulnerability in the Linux kernel related to the debugobjects subsystem has been resolved. The issue occurs on real-time (RT) enabled kernels where the fill_pool() function calls rtlock_lock(), which asserts if the current task's pi_blocked_on field is set. This condition can corrupt the priority inheritance chain because a task can only block on one lock. The fix prevents fill_pool() from executing when pi_blocked_on is set, avoiding this assertion failure.
CVSS v3.1
Score 5.5medium
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in the Linux kernel's debugobjects subsystem affects RT enabled kernels. Specifically, fill_pool() calls rtlock_lock(), which triggers an assertion failure if current::pi_blocked_on is set, as a task can only block on one lock to maintain priority inheritance integrity. The patch expands the conditional logic to check current::pi_blocked_on before calling fill_pool(), preventing the assertion and potential corruption of the priority inheritance chain.
Potential Impact
This vulnerability can cause an assertion failure leading to a denial of service (kernel crash) on RT enabled Linux kernels. There is no indication of confidentiality or integrity impact. The denial of service impact is rated as high in the CVSS vector, but overall severity is medium.
Mitigation Recommendations
A fix has been implemented to prevent fill_pool() from being called when current::pi_blocked_on is set. Users should apply the official kernel updates that include this patch. Since this is a kernel-level issue, updating to the fixed kernel version is the recommended remediation. Patch status is not explicitly confirmed in the provided data; verify with the vendor or distribution advisory for the exact fixed version and update accordingly.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-6w3p-w4p9-rj2h
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-53327"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a498a7727e9c7971936eed6
Added to database: 07/04/2026, 22:34:31 UTC
Last enriched: 07/23/2026, 22:57:18 UTC
Last updated: 08/18/2026, 22:49:28 UTC
Views: 38
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