Threats Tagged 'ghsa-c6wv-8c38-r975'
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Threats Tagged 'ghsa-c6wv-8c38-r975'
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A livelock vulnerability exists in the Linux kernel's quota subsystem when interacting with filesystem freeze operations. The issue occurs because quotactl_block() enters a retry loop waiting for the filesystem to thaw, but on kernels with preemption disabled, this loop prevents the CPU from reaching an RCU quiescent state. This causes synchronize_rcu() to wait indefinitely, resulting in a hang of the freezer process and 100% CPU usage by the quota process. The problem can be reliably reproduced by running freeze and quota toggle operations on the same CPU. Adding a scheduling point (cond_resched()) to the retry loop resolves the issue. Join the discussion | GCVE Database | 05/27/2026, 15:33:15 UTC Added: 06/26/2026, 22:06:38 UTC |
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