{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-50193",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-06-18T10:57:27.428Z",
        "datePublished": "2025-06-18T11:03:38.262Z",
        "dateUpdated": "2026-05-11T19:14:35.492Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:14:35.492Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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>"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/erofs/decompressor_lzma.c"
                    ],
                    "versions": [
                        {
                            "version": "622ceaddb7649ca328832f50ba1400af778d75fa",
                            "lessThan": "2478e36ec437a27f8a05bea9e4269a68c554e21f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "622ceaddb7649ca328832f50ba1400af778d75fa",
                            "lessThan": "96aa2a6a89618d850ef082e4268007e840c28769",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "622ceaddb7649ca328832f50ba1400af778d75fa",
                            "lessThan": "2df7c4bd7c1d2bc5ece5e9ed19dbd386810c2a65",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/erofs/decompressor_lzma.c"
                    ],
                    "versions": [
                        {
                            "version": "5.16",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.16",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.18.18",
                            "lessThanOrEqual": "5.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.19.2",
                            "lessThanOrEqual": "5.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.0",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.16",
                                    "versionEndExcluding": "5.18.18"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.16",
                                    "versionEndExcluding": "5.19.2"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.16",
                                    "versionEndExcluding": "6.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/2478e36ec437a27f8a05bea9e4269a68c554e21f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/96aa2a6a89618d850ef082e4268007e840c28769"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2df7c4bd7c1d2bc5ece5e9ed19dbd386810c2a65"
                }
            ],
            "title": "erofs: wake up all waiters after z_erofs_lzma_head ready",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}