In the Linux kernel, the following vulnerability has been resolved: proc: protect ptrace_may_access() with exec_update_lock (part 1) Fix the easy… (CVE-2026-64371)
A vulnerability in the Linux kernel related to the proc filesystem was resolved by adding proper locking to ptrace_may_access() calls. The fix involves protecting these calls with exec_update_lock or using mm_access() to prevent race conditions. This addresses unsafe access patterns in several procfs functions such as do_task_stat(), proc_pid_wchan(), proc_map_files_lookup(), proc_map_files_readdir(), proc_ns_get_link(), and proc_ns_readlink().
AI Analysis
Technical Summary
The Linux kernel vulnerability CVE-2026-64371 concerns the lack of proper synchronization when procfs calls ptrace_may_access() without holding the exec_update_lock. This could lead to race conditions or inconsistent access control checks. The patch adds exec_update_lock protection or replaces get_task_mm() with mm_access() in affected procfs functions to ensure safe access to task memory and metadata.
Potential Impact
The vulnerability could allow improper access checks in procfs, potentially leading to unauthorized information disclosure or inconsistent state observations. However, no known exploits in the wild have been reported, and the impact details are not fully specified in the available data.
Mitigation Recommendations
A fix has been implemented in the Linux kernel by adding exec_update_lock protection or using mm_access() in the affected procfs functions. Users should apply the official kernel updates that include this patch once available. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor or kernel mailing list advisories for the current remediation status.
In the Linux kernel, the following vulnerability has been resolved: proc: protect ptrace_may_access() with exec_update_lock (part 1) Fix the easy… (CVE-2026-64371)
Description
A vulnerability in the Linux kernel related to the proc filesystem was resolved by adding proper locking to ptrace_may_access() calls. The fix involves protecting these calls with exec_update_lock or using mm_access() to prevent race conditions. This addresses unsafe access patterns in several procfs functions such as do_task_stat(), proc_pid_wchan(), proc_map_files_lookup(), proc_map_files_readdir(), proc_ns_get_link(), and proc_ns_readlink().
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel vulnerability CVE-2026-64371 concerns the lack of proper synchronization when procfs calls ptrace_may_access() without holding the exec_update_lock. This could lead to race conditions or inconsistent access control checks. The patch adds exec_update_lock protection or replaces get_task_mm() with mm_access() in affected procfs functions to ensure safe access to task memory and metadata.
Potential Impact
The vulnerability could allow improper access checks in procfs, potentially leading to unauthorized information disclosure or inconsistent state observations. However, no known exploits in the wild have been reported, and the impact details are not fully specified in the available data.
Mitigation Recommendations
A fix has been implemented in the Linux kernel by adding exec_update_lock protection or using mm_access() in the affected procfs functions. Users should apply the official kernel updates that include this patch once available. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor or kernel mailing list advisories for the current remediation status.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-mx48-2qjx-49h9
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64371"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a65420b9c2644c7f808472a
Added to database: 07/25/2026, 23:08:59 UTC
Last enriched: 07/25/2026, 23:28:16 UTC
Last updated: 07/26/2026, 04:44:43 UTC
Views: 5
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