SB2026050610 - Out-of-bounds read in Linux kernel fs
Published: May 6, 2026
Security Bulletin ID
SB2026050610
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2026-43071)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an out-of-bounds read in dentry_hashtable when processing lookups with dhash_entries set to 1. A local user can trigger filesystem lookup operations to cause a denial of service.
The issue occurs because a single hash bucket can cause an invalid shift calculation that leads to access of unallocated memory.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/277cedabb0ab86baae83fa58218be13c6d3e5526
- https://git.kernel.org/stable/c/426ef05e82ee52c8d0e95fc0808b7383d8352d73
- https://git.kernel.org/stable/c/5718df131ab78897a9dd1f2e71c3ba732d4392af
- https://git.kernel.org/stable/c/755b40903eff563768d4d96fd4ef51ec48adde3b
- https://git.kernel.org/stable/c/ddd57ebce245f9c7e2f6902a6c087d6186d2385d
- https://git.kernel.org/stable/c/f08fe8891c3eeb63b73f9f1f6d97aa629c821579