In the Linux kernel, the following vulnerability has been resolved: hpfs: fix a crash if hpfs_map_dnode_bitmap fails If hpfs_map_dnode_bitmap fails,… (CVE-2026-63954)
In the Linux kernel, the following vulnerability has been resolved: hpfs: fix a crash if hpfs_map_dnode_bitmap fails If hpfs_map_dnode_bitmap fails, the code would call hpfs_brelse4 on uninitialized quad buffer head, causing a crash.
AI Analysis
Technical Summary
The Linux kernel contained a vulnerability in the HPFS filesystem implementation where failure of the hpfs_map_dnode_bitmap function led to a call to hpfs_brelse4 on an uninitialized quad buffer head. This improper handling caused a kernel crash. The vulnerability has been fixed in the Linux kernel source code to prevent this crash condition.
Potential Impact
Successful exploitation of this vulnerability results in a kernel crash, causing a denial of service condition on affected systems. There is no indication of code execution or privilege escalation from the provided data.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel. Users and administrators should apply the official kernel updates that include this fix. Patch status is not explicitly confirmed in the provided data; therefore, check the Linux kernel vendor advisory or source repository for the exact fixed versions and update accordingly.
In the Linux kernel, the following vulnerability has been resolved: hpfs: fix a crash if hpfs_map_dnode_bitmap fails If hpfs_map_dnode_bitmap fails,… (CVE-2026-63954)
Description
In the Linux kernel, the following vulnerability has been resolved: hpfs: fix a crash if hpfs_map_dnode_bitmap fails If hpfs_map_dnode_bitmap fails, the code would call hpfs_brelse4 on uninitialized quad buffer head, causing a crash.
CVSS v3.1
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel contained a vulnerability in the HPFS filesystem implementation where failure of the hpfs_map_dnode_bitmap function led to a call to hpfs_brelse4 on an uninitialized quad buffer head. This improper handling caused a kernel crash. The vulnerability has been fixed in the Linux kernel source code to prevent this crash condition.
Potential Impact
Successful exploitation of this vulnerability results in a kernel crash, causing a denial of service condition on affected systems. There is no indication of code execution or privilege escalation from the provided data.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel. Users and administrators should apply the official kernel updates that include this fix. Patch status is not explicitly confirmed in the provided data; therefore, check the Linux kernel vendor advisory or source repository for the exact fixed versions and update accordingly.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-67c6-765v-26g2
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-63954"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5d27aa2a4a8d598912ebf5
Added to database: 07/19/2026, 19:38:18 UTC
Last enriched: 07/19/2026, 20:06:10 UTC
Last updated: 07/20/2026, 21:51:56 UTC
Views: 14
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