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CVE-2024-53052 is a deadlock vulnerability in the Linux kernel io_uring direct-write path. When starting an O_DIRECT write, io_uring unconditionally calls kiocb_start_write() to acquire the superblock read/write semaphore without honoring IOCB_NOWAIT. If a filesystem freeze is underway, this acquisition can block the task responsible for completing earlier writes, while the freeze operation waits for those writes to finish. The resulting circular dependency prevents both write completion and filesystem freezing from progressing. Initiating the filesystem-freeze operation requires CAP_SYS_ADMIN.
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A Linux kernel io_uring flaw causes a deadlock when direct writes overlap with filesystem freezing. Unconditionally acquiring the superblock semaphore can block the task responsible for completing earlier writes, preventing both writes and freezing from progressing. The impact is local denial of service; triggering the filesystem freeze requires CAP_SYS_ADMIN. The reference reports a CVSS v3 base score of 4.4 and recommends updating affected Google COS kernel packages to version 18613.75.60 or later.
Linux kernel io_uring O_DIRECT NOWAIT validation flaw.
A Linux kernel io_uring O_DIRECT write-path deadlock that can cause filesystem-freeze operations and related I/O tasks to become stuck, resulting in a local denial of service. Triggering filesystem freezing requires CAP_SYS_ADMIN, limiting exploitation to a highly privileged local user.
A locally exploitable, high-privilege vulnerability that can cause a high availability impact (denial of service). The supplied content identifies no confidentiality or integrity impact.
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