CVE-2026-90187

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90187", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.791Z", "datePublished": "2026-09-17T16:07:09.683Z", "dateUpdated": "2026-10-30T12:34:40.977Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:34:40.977Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: free zones array on device power-off\n\nnull_init_zoned_dev() allocates dev->zones when a zoned device is powered\non, but null_del_dev() never frees it on power-off; dev->zones is only\nfreed later in null_free_dev(), when the configfs directory is removed. If\nthe device is powered off and then on again, null_init_zoned_dev()\nallocates a new array and overwrites the dev->zones pointer, leaking the\nprevious allocation each power cycle.\n\nFree dev->zones in null_del_dev() via null_free_zoned_dev() to solve it.\nAnd calling null_free_zoned_dev() in null_free_dev() is no longer necessary\nbecause every caller already invokes null_del_dev() first: via\nnullb_group_drop_item() before nullb_device_release(), in the\nnull_add_dev() error path of null_create_dev(), and in null_destroy_dev().\nRemove the redundant call.\n\nAnd take &lock around zone_cond_store() in the two store wrappers to\nserialize dev->zones check-and-deref against its alloc/free, which already\nrun under &lock. The reason there was no problem before is that only\nnullb_device_release() or null_exit() frees the dev->zones, which\nguarantees that subsequent users won't access the configfs interface."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/null_blk/main.c"], "versions": [{"version": "ca4b2a011948fae4e4d31490107db4926385a983", "lessThan": "26d21585caa61c30d0f3044a1e6d172456148c9f", "status": "affected", "versionType": "git"}, {"version": "ca4b2a011948fae4e4d31490107db4926385a983", "lessThan": "08a31a2cc3d1cea67ccd292d01511cd0a72d4656", "status": "affected", "versionType": "git"}, {"version": "ca4b2a011948fae4e4d31490107db4926385a983", "lessThan": "056be41932c95aabdb3c2967d1ef4978f17a0225", "status": "affected", "versionType": "git"}, {"version": "ca4b2a011948fae4e4d31490107db4926385a983", "lessThan": "b2437d37fcc31fce8a5da1cc1739e284814d2491", "status": "affected", "versionType": "git"}, {"version": "ca4b2a011948fae4e4d31490107db4926385a983", "lessThan": "0a3afab87124171022fb3579502fa38ef5b311c9", "status": "affected", "versionType": "git"}, {"version": "ca4b2a011948fae4e4d31490107db4926385a983", "lessThan": "2a6357a9b935a34f5508618fee8a7fffbf7722a8", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/null_blk/main.c"], "versions": [{"version": "4.19", "status": "affected"}, {"version": "0", "lessThan": "4.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "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": "4.19", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/26d21585caa61c30d0f3044a1e6d172456148c9f"}, {"url": "https://git.kernel.org/stable/c/08a31a2cc3d1cea67ccd292d01511cd0a72d4656"}, {"url": "https://git.kernel.org/stable/c/056be41932c95aabdb3c2967d1ef4978f17a0225"}, {"url": "https://git.kernel.org/stable/c/b2437d37fcc31fce8a5da1cc1739e284814d2491"}, {"url": "https://git.kernel.org/stable/c/0a3afab87124171022fb3579502fa38ef5b311c9"}, {"url": "https://git.kernel.org/stable/c/2a6357a9b935a34f5508618fee8a7fffbf7722a8"}], "title": "null_blk: free zones array on device power-off", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/block/null_blk/main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "26d21585caa61c30d0f3044a1e6d172456148c9f", "status": "affected", "version": "ca4b2a011948fae4e4d31490107db4926385a983", "versionType": "git"}, {"lessThan": "08a31a2cc3d1cea67ccd292d01511cd0a72d4656", "status": "affected", "version": "ca4b2a011948fae4e4d31490107db4926385a983", "versionType": "git"}, {"lessThan": "056be41932c95aabdb3c2967d1ef4978f17a0225", "status": "affected", "version": "ca4b2a011948fae4e4d31490107db4926385a983", "versionType": "git"}, {"lessThan": "b2437d37fcc31fce8a5da1cc1739e284814d2491", "status": "affected", "version": "ca4b2a011948fae4e4d31490107db4926385a983", "versionType": "git"}, {"lessThan": "0a3afab87124171022fb3579502fa38ef5b311c9", "status": "affected", "version": "ca4b2a011948fae4e4d31490107db4926385a983", "versionType": "git"}, {"lessThan": "2a6357a9b935a34f5508618fee8a7fffbf7722a8", "status": "affected", "version": "ca4b2a011948fae4e4d31490107db4926385a983", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/block/null_blk/main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.19"}, {"lessThan": "4.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "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\nnull_blk: free zones array on device power-off\n\nnull_init_zoned_dev() allocates dev->zones when a zoned device is powered\non, but null_del_dev() never frees it on power-off; dev->zones is only\nfreed later in null_free_dev(), when the configfs directory is removed. If\nthe device is powered off and then on again, null_init_zoned_dev()\nallocates a new array and overwrites the dev->zones pointer, leaking the\nprevious allocation each power cycle.\n\nFree dev->zones in null_del_dev() via null_free_zoned_dev() to solve it.\nAnd calling null_free_zoned_dev() in null_free_dev() is no longer necessary\nbecause every caller already invokes null_del_dev() first: via\nnullb_group_drop_item() before nullb_device_release(), in the\nnull_add_dev() error path of null_create_dev(), and in null_destroy_dev().\nRemove the redundant call.\n\nAnd take &lock around zone_cond_store() in the two store wrappers to\nserialize dev->zones check-and-deref against its alloc/free, which already\nrun under &lock. The reason there was no problem before is that only\nnullb_device_release() or null_exit() frees the dev->zones, which\nguarantees that subsequent users won't access the configfs interface."}], "id": "CVE-2026-90187", "lastModified": "2026-10-30T13:20:45.803", "metrics": {}, "published": "2026-09-17T17:17:13.270", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/056be41932c95aabdb3c2967d1ef4978f17a0225"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/08a31a2cc3d1cea67ccd292d01511cd0a72d4656"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0a3afab87124171022fb3579502fa38ef5b311c9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/26d21585caa61c30d0f3044a1e6d172456148c9f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2a6357a9b935a34f5508618fee8a7fffbf7722a8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b2437d37fcc31fce8a5da1cc1739e284814d2491"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ca4b2a011948fae4e4d31490107db4926385a983,056be41932c95aabdb3c2967d1ef4978f17a0225)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ca4b2a011948fae4e4d31490107db4926385a983,b2437d37fcc31fce8a5da1cc1739e284814d2491)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ca4b2a011948fae4e4d31490107db4926385a983,0a3afab87124171022fb3579502fa38ef5b311c9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ca4b2a011948fae4e4d31490107db4926385a983,2a6357a9b935a34f5508618fee8a7fffbf7722a8)"}}], "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": "generic", "value": "4.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "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": "2026-09-18T18:30:11.912290+00:00", "updated": "2026-09-20T02:15:17.056379+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-401", "CWE-399"]}