{"cve":"CVE-2022-50193","nvd":{"published":"2025-06-18T11:15:49.920","modified":"2026-06-17T05:22:56.873","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: wake up all waiters after z_erofs_lzma_head ready\n\nWhen the user mounts the erofs second times, the decompression thread\nmay hung. The problem happens due to a sequence of steps like the\nfollowing:\n\n1) Task A called z_erofs_load_lzma_config which obtain all of the node\n   from the z_erofs_lzma_head.\n\n2) At this time, task B called the z_erofs_lzma_decompress and wanted to\n   get a node. But the z_erofs_lzma_head was empty, the Task B had to\n   sleep.\n\n3) Task A release nodes and push nodes into the z_erofs_lzma_head. But\n   task B was still sleeping.\n\nOne example report when the hung happens:\ntask:kworker/u3:1 state:D stack:14384 pid: 86 ppid: 2 flags:0x00004000\nWorkqueue: erofs_unzipd z_erofs_decompressqueue_work\nCall Trace:\n <TASK>\n __schedule+0x281/0x760\n schedule+0x49/0xb0\n z_erofs_lzma_decompress+0x4bc/0x580\n ? cpu_core_flags+0x10/0x10\n z_erofs_decompress_pcluster+0x49b/0xba0\n ? __update_load_avg_se+0x2b0/0x330\n ? __update_load_avg_se+0x2b0/0x330\n ? update_load_avg+0x5f/0x690\n ? update_load_avg+0x5f/0x690\n ? set_next_entity+0xbd/0x110\n ? _raw_spin_unlock+0xd/0x20\n z_erofs_decompress_queue.isra.0+0x2e/0x50\n z_erofs_decompressqueue_work+0x30/0x60\n process_one_work+0x1d3/0x3a0\n worker_thread+0x45/0x3a0\n ? process_one_work+0x3a0/0x3a0\n kthread+0xe2/0x110\n ? kthread_complete_and_exit+0x20/0x20\n ret_from_fork+0x22/0x30\n </TASK>","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/2478e36ec437a27f8a05bea9e4269a68c554e21f","https://git.kernel.org/stable/c/2df7c4bd7c1d2bc5ece5e9ed19dbd386810c2a65","https://git.kernel.org/stable/c/96aa2a6a89618d850ef082e4268007e840c28769"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:03:23.287444849+00:00"},"epss":{"cve":"CVE-2022-50193","score":0.00243,"percentile":0.15489,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}