# CVE-2022-50193: linux: In the Linux kernel, the following vulnerability has been resolved:  erofs: wake up all waiters after z_erofs_lzma_he...

CVE-2022-50193 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50193, released June 18, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-50193
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 18, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  erofs: wake up all waiters after z_erofs_lzma_head ready  When the user mounts the erofs second times, the decompression thread may hung. The problem happens due to a sequence of steps like the following:  1) Task A called z_erofs_load_lzma_config which obtain all of the node    from the z_erofs_lzma_head.  2) At this time, task B called the z_erofs_lzma_decompress and wanted to    get a node. But the z_erofs_lzma_head was empty, the Task B had to    sleep.  3) Task A release nodes and push nodes into the z_erofs_lzma_head. But    task B was still sleeping.  One example report when the hung happens: task:kworker/u3:1 state:D stack:14384 pid: 86 ppid: 2 flags:0x00004000 Workqueue: erofs_unzipd z_erofs_decompressqueue_work Call Trace:  <TASK>  __schedule+0x281/0x760  schedule+0x49/0xb0  z_erofs_lzma_decompress+0x4bc/0x580  ? cpu_core_flags+0x10/0x10  z_erofs_decompress_pcluster+0x49b/0xba0  ? __update_load_avg_se+0x2b0/0x330  ? __update_load_avg_se+0x2b0/0x330  ? update_load_avg+0x5f/0x690  ? update_load_avg+0x5f/0x690  ? set_next_entity+0xbd/0x110  ? _raw_spin_unlock+0xd/0x20  z_erofs_decompress_queue.isra.0+0x2e/0x50  z_erofs_decompressqueue_work+0x30/0x60  process_one_work+0x1d3/0x3a0  worker_thread+0x45/0x3a0  ? process_one_work+0x3a0/0x3a0  kthread+0xe2/0x110  ? kthread_complete_and_exit+0x20/0x20  ret_from_fork+0x22/0x30  </TASK>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.2-1 | [DEBIAN-CVE-2022-50193](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50193.md) | Jun 18, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.2-1 | [DEBIAN-CVE-2022-50193](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50193.md) | Jun 18, 2025 |
| Linux | linux Debian 14 | 6.0.2-1 | [DEBIAN-CVE-2022-50193](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50193.md) | Jun 18, 2025 |

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