In the Linux kernel, the following vulnerability has been resolved: mm/swap: add cond_resched() in swap_reclaim_full_clusters to prevent softlockup… (CVE-2026-64415)
A vulnerability in the Linux kernel's memory management swap subsystem was resolved by adding periodic cond_resched() calls in the swap_reclaim_full_clusters function to prevent softlockup conditions. The issue was discovered during an internal stress test involving heavy memory and swap usage on a large ARM64 system. The vulnerability could cause the kernel to become unresponsive (softlockup) under specific high-load conditions involving swap reclaim operations.
AI Analysis
Technical Summary
The Linux kernel had a vulnerability in the mm/swap subsystem where the swap_reclaim_full_clusters function could cause a softlockup due to lack of rescheduling during long reclaim operations. This was observed under heavy memory and swap stress on a large ARM64 machine with many CPUs and a large swap device. The fix involved adding periodic cond_resched() calls to allow the kernel scheduler to run and prevent the softlockup. A detailed call trace from the panic was provided, showing the kernel worker thread stuck in swap reclaim code paths.
Potential Impact
The vulnerability could cause the Linux kernel to experience a softlockup, effectively making the system unresponsive during heavy swap reclaim operations. This impacts system stability and availability under specific high-load memory and swap stress scenarios. No information about privilege escalation or data corruption is provided.
Mitigation Recommendations
A fix has been implemented in the Linux kernel by adding cond_resched() calls in the swap_reclaim_full_clusters function to prevent softlockup. Users should update to the kernel version that includes this patch once available. Patch status is not yet confirmed in the provided data — check the official Linux kernel advisories or vendor updates for the exact fixed versions and remediation instructions.
In the Linux kernel, the following vulnerability has been resolved: mm/swap: add cond_resched() in swap_reclaim_full_clusters to prevent softlockup… (CVE-2026-64415)
Description
A vulnerability in the Linux kernel's memory management swap subsystem was resolved by adding periodic cond_resched() calls in the swap_reclaim_full_clusters function to prevent softlockup conditions. The issue was discovered during an internal stress test involving heavy memory and swap usage on a large ARM64 system. The vulnerability could cause the kernel to become unresponsive (softlockup) under specific high-load conditions involving swap reclaim operations.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel had a vulnerability in the mm/swap subsystem where the swap_reclaim_full_clusters function could cause a softlockup due to lack of rescheduling during long reclaim operations. This was observed under heavy memory and swap stress on a large ARM64 machine with many CPUs and a large swap device. The fix involved adding periodic cond_resched() calls to allow the kernel scheduler to run and prevent the softlockup. A detailed call trace from the panic was provided, showing the kernel worker thread stuck in swap reclaim code paths.
Potential Impact
The vulnerability could cause the Linux kernel to experience a softlockup, effectively making the system unresponsive during heavy swap reclaim operations. This impacts system stability and availability under specific high-load memory and swap stress scenarios. No information about privilege escalation or data corruption is provided.
Mitigation Recommendations
A fix has been implemented in the Linux kernel by adding cond_resched() calls in the swap_reclaim_full_clusters function to prevent softlockup. Users should update to the kernel version that includes this patch once available. Patch status is not yet confirmed in the provided data — check the official Linux kernel advisories or vendor updates for the exact fixed versions and remediation instructions.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-f2f9-54cv-v7gf
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64415"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a65420a9c2644c7f8084168
Added to database: 07/25/2026, 23:08:58 UTC
Last enriched: 07/25/2026, 23:26:49 UTC
Last updated: 07/26/2026, 03:59:34 UTC
Views: 4
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