{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-90209",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.793Z",
        "datePublished": "2026-09-17T16:07:24.126Z",
        "dateUpdated": "2026-10-19T08:59:45.470Z"
    },
    "containers": {
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            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T08:59:45.470Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/debug: Fix deadlock during unregister\n\nUnregistering an s390dbf debug area while one of the associated debugfs\nfiles is being written to can cause a deadlock:\n\n$ echo >.../vmur/level    $ rmmod vmur\n===================================================\ndebugfs write\ndebugfs_file_get()\n                          debug_unregister()\n                          mutex_lock(debug_mutex)\n                          debugfs_remove()\n                          wait for debugfs_file_put()\ndebug_file_ops.write()\ndebug_input()\nmutex_lock(debug_mutex) ==> DEADLOCK\n\nFix this by splitting debug_unregister() into an s390dbf and debugfs\npart, and running only the s390dbf part with debug_mutex locked."
                }
            ],
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                            "status": "affected",
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                            "status": "affected",
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                            "status": "unaffected",
                            "versionType": "semver"
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                            "versionType": "original_commit_for_fix"
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                    "url": "https://git.kernel.org/stable/c/445c31ac638fd1af203d79bdf25fc0cb3149fbbc"
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