Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: fuse-uring: remove request-less entries from ent_w_req_queue to fix NULL deref… (CVE-2026-64258)
A vulnerability in the Linux kernel fuse-uring subsystem could lead to a NULL pointer dereference causing a denial of service. This occurs when a request is terminated but its entry remains in a queue in an invalid state, leading to a crash during request expiration scanning. The issue has been resolved by properly removing the entry from the queue and updating its state before termination.
AI Analysis
Technical Summary
The vulnerability in the Linux kernel fuse-uring component involves improper handling of request entries in the ent_w_req_queue. When a copy into the userspace ring buffer fails, the request is terminated and the fuse_req pointer is set to NULL, but the corresponding queue entry remains in the FRRS_FUSE_REQ state. If the request expiration logic scans this queue before the entry is removed, a NULL pointer dereference can occur. The fix removes the entry from the queue and changes its state to FRRS_INVALID before terminating the request, preventing the NULL dereference.
Potential Impact
This vulnerability can cause a denial of service by crashing the kernel due to a NULL pointer dereference. There is no impact on confidentiality or integrity reported. The CVSS score is 5.5 (medium severity) with an attack vector of local, requiring low privileges and no user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since this is a kernel vulnerability, applying official kernel updates from the Linux distribution vendor when available is recommended to address this issue.
Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: fuse-uring: remove request-less entries from ent_w_req_queue to fix NULL deref… (CVE-2026-64258)
Description
A vulnerability in the Linux kernel fuse-uring subsystem could lead to a NULL pointer dereference causing a denial of service. This occurs when a request is terminated but its entry remains in a queue in an invalid state, leading to a crash during request expiration scanning. The issue has been resolved by properly removing the entry from the queue and updating its state before termination.
CVSS v3.1
Score 5.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in the Linux kernel fuse-uring component involves improper handling of request entries in the ent_w_req_queue. When a copy into the userspace ring buffer fails, the request is terminated and the fuse_req pointer is set to NULL, but the corresponding queue entry remains in the FRRS_FUSE_REQ state. If the request expiration logic scans this queue before the entry is removed, a NULL pointer dereference can occur. The fix removes the entry from the queue and changes its state to FRRS_INVALID before terminating the request, preventing the NULL dereference.
Potential Impact
This vulnerability can cause a denial of service by crashing the kernel due to a NULL pointer dereference. There is no impact on confidentiality or integrity reported. The CVSS score is 5.5 (medium severity) with an attack vector of local, requiring low privileges and no user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since this is a kernel vulnerability, applying official kernel updates from the Linux distribution vendor when available is recommended to address this issue.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-942f-2j62-7hwj
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64258"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a65420f9c2644c7f8086c49
Added to database: 07/25/2026, 23:09:03 UTC
Last enriched: 08/15/2026, 03:20:46 UTC
Last updated: 09/07/2026, 10:52:10 UTC
Views: 48
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