CVE-2026-90209

{"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": {"cna": {"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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/s390/kernel/debug.c"], "versions": [{"version": "9372a82892c2caa6bccab9a4081166fa769699f8", "lessThan": "a214c3dacc779b2afcb0ac9c8001e45ee4ffb2ed", "status": "affected", "versionType": "git"}, {"version": "9372a82892c2caa6bccab9a4081166fa769699f8", "lessThan": "183f8f6d64bb0510070c856b9927618c53014a7b", "status": "affected", "versionType": "git"}, {"version": "9372a82892c2caa6bccab9a4081166fa769699f8", "lessThan": "a08b70ed2d1ec907353a72f15163b8e34ff4b2f8", "status": "affected", "versionType": "git"}, {"version": "9372a82892c2caa6bccab9a4081166fa769699f8", "lessThan": "45bb341d1b73eb293e0dd43d9b72bbc8b615d0ba", "status": "affected", "versionType": "git"}, {"version": "9372a82892c2caa6bccab9a4081166fa769699f8", "lessThan": "5d83f3faa3fb7f23f298cfd40382611999de5d1d", "status": "affected", "versionType": "git"}, {"version": "9372a82892c2caa6bccab9a4081166fa769699f8", "lessThan": "54e1259b75d6402a1d0cfb822b9bb2c507e53dab", "status": "affected", "versionType": "git"}, {"version": "9372a82892c2caa6bccab9a4081166fa769699f8", "lessThan": "445c31ac638fd1af203d79bdf25fc0cb3149fbbc", "status": "affected", "versionType": "git"}, {"version": "c68ba4a708fbd0efdc384cd29250bb292a45e559", "status": "affected", "versionType": "git"}, {"version": "86f9980909f31ab205323eeeb290fe3cbb4952b4", "status": "affected", "versionType": "git"}, {"version": "fe5793e90d3f572a87ba67fe2f0e1679fdff14f8", "status": "affected", "versionType": "git"}, {"version": "e234f66168f0d50c0d28154fb983a14e85c3c526", "status": "affected", "versionType": "git"}, {"version": "5.4.146", "lessThan": "5.5", "status": "affected", "versionType": "semver"}, {"version": "5.10.65", "lessThan": "5.11", "status": "affected", "versionType": "semver"}, {"version": "5.13.17", "lessThan": "5.14", "status": "affected", "versionType": "semver"}, {"version": "5.14.4", "lessThan": "5.15", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/s390/kernel/debug.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "5.15", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.146"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.65"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13.17"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14.4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a214c3dacc779b2afcb0ac9c8001e45ee4ffb2ed"}, {"url": "https://git.kernel.org/stable/c/183f8f6d64bb0510070c856b9927618c53014a7b"}, {"url": "https://git.kernel.org/stable/c/a08b70ed2d1ec907353a72f15163b8e34ff4b2f8"}, {"url": "https://git.kernel.org/stable/c/45bb341d1b73eb293e0dd43d9b72bbc8b615d0ba"}, {"url": "https://git.kernel.org/stable/c/5d83f3faa3fb7f23f298cfd40382611999de5d1d"}, {"url": "https://git.kernel.org/stable/c/54e1259b75d6402a1d0cfb822b9bb2c507e53dab"}, {"url": "https://git.kernel.org/stable/c/445c31ac638fd1af203d79bdf25fc0cb3149fbbc"}], "title": "s390/debug: Fix deadlock during unregister", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/s390/kernel/debug.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "a214c3dacc779b2afcb0ac9c8001e45ee4ffb2ed", "status": "affected", "version": "9372a82892c2caa6bccab9a4081166fa769699f8", "versionType": "git"}, {"lessThan": "183f8f6d64bb0510070c856b9927618c53014a7b", "status": "affected", "version": "9372a82892c2caa6bccab9a4081166fa769699f8", "versionType": "git"}, {"lessThan": "a08b70ed2d1ec907353a72f15163b8e34ff4b2f8", "status": "affected", "version": "9372a82892c2caa6bccab9a4081166fa769699f8", "versionType": "git"}, {"lessThan": "45bb341d1b73eb293e0dd43d9b72bbc8b615d0ba", "status": "affected", "version": "9372a82892c2caa6bccab9a4081166fa769699f8", "versionType": "git"}, {"lessThan": "5d83f3faa3fb7f23f298cfd40382611999de5d1d", "status": "affected", "version": "9372a82892c2caa6bccab9a4081166fa769699f8", "versionType": "git"}, {"lessThan": "54e1259b75d6402a1d0cfb822b9bb2c507e53dab", "status": "affected", "version": "9372a82892c2caa6bccab9a4081166fa769699f8", "versionType": "git"}, {"lessThan": "445c31ac638fd1af203d79bdf25fc0cb3149fbbc", "status": "affected", "version": "9372a82892c2caa6bccab9a4081166fa769699f8", "versionType": "git"}, {"status": "affected", "version": "c68ba4a708fbd0efdc384cd29250bb292a45e559", "versionType": "git"}, {"status": "affected", "version": "86f9980909f31ab205323eeeb290fe3cbb4952b4", "versionType": "git"}, {"status": "affected", "version": "fe5793e90d3f572a87ba67fe2f0e1679fdff14f8", "versionType": "git"}, {"status": "affected", "version": "e234f66168f0d50c0d28154fb983a14e85c3c526", "versionType": "git"}, {"lessThan": "5.5", "status": "affected", "version": "5.4.146", "versionType": "semver"}, {"lessThan": "5.11", "status": "affected", "version": "5.10.65", "versionType": "semver"}, {"lessThan": "5.14", "status": "affected", "version": "5.13.17", "versionType": "semver"}, {"lessThan": "5.15", "status": "affected", "version": "5.14.4", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/s390/kernel/debug.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.15"}, {"lessThan": "5.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-90209", "lastModified": "2026-10-19T09:19:11.057", "metrics": {}, "published": "2026-09-17T17:17:16.060", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/183f8f6d64bb0510070c856b9927618c53014a7b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/445c31ac638fd1af203d79bdf25fc0cb3149fbbc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/45bb341d1b73eb293e0dd43d9b72bbc8b615d0ba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/54e1259b75d6402a1d0cfb822b9bb2c507e53dab"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5d83f3faa3fb7f23f298cfd40382611999de5d1d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a08b70ed2d1ec907353a72f15163b8e34ff4b2f8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a214c3dacc779b2afcb0ac9c8001e45ee4ffb2ed"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9372a82892c2caa6bccab9a4081166fa769699f8,a214c3dacc779b2afcb0ac9c8001e45ee4ffb2ed)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9372a82892c2caa6bccab9a4081166fa769699f8,183f8f6d64bb0510070c856b9927618c53014a7b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9372a82892c2caa6bccab9a4081166fa769699f8,a08b70ed2d1ec907353a72f15163b8e34ff4b2f8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9372a82892c2caa6bccab9a4081166fa769699f8,45bb341d1b73eb293e0dd43d9b72bbc8b615d0ba)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9372a82892c2caa6bccab9a4081166fa769699f8,5d83f3faa3fb7f23f298cfd40382611999de5d1d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9372a82892c2caa6bccab9a4081166fa769699f8,54e1259b75d6402a1d0cfb822b9bb2c507e53dab)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9372a82892c2caa6bccab9a4081166fa769699f8,445c31ac638fd1af203d79bdf25fc0cb3149fbbc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "c68ba4a708fbd0efdc384cd29250bb292a45e559"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "86f9980909f31ab205323eeeb290fe3cbb4952b4"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "fe5793e90d3f572a87ba67fe2f0e1679fdff14f8"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "e234f66168f0d50c0d28154fb983a14e85c3c526"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.4.146,5.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.10.65,5.11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.13.17,5.14)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.14.4,5.15)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "5.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.221,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.188,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.157,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.110,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.52,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.6,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-19T10:00:07.452323+00:00", "updated": "2026-09-20T01:30:16.547272+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-410"]}