CVE-2026-90190

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90190", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.792Z", "datePublished": "2026-09-17T16:07:11.654Z", "dateUpdated": "2026-10-19T08:59:26.940Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:59:26.940Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: use DEFINE_MUTEX for the file-scope mutex\n\nIn null_init(), mutex_init(&lock) currently happens after\nconfigfs_register_subsystem(), which exposes the nullb subsystem to\nuserspace. A racing mkdir() into /sys/kernel/config/nullb/ can reach\nnull_find_dev_by_name() -> mutex_lock(&lock) before the mutex is\ninitialized, trigger warning:\n\n[ 123.137788] DEBUG_LOCKS_WARN_ON(lock->magic != lock)\n[ 123.137796] WARNING: kernel/locking/mutex.c:159 at mutex_lock+0x171/0x1c0, CPU#13: mkdir/1301\n[ 123.140090] Modules linked in: null_blk(+) nft_fib_inet nft_fib_ipv4\n......\n[ 123.154926] Call Trace:\n[ 123.155172] <TASK>\n[ 123.155419] ? __pfx_mutex_lock+0x10/0x10\n[ 123.156181] ? __pfx__raw_spin_lock+0x10/0x10\n[ 123.156571] nullb_group_make_group+0x20/0x100 [null_blk]\n[ 123.157011] configfs_mkdir+0x47b/0xc70\n[ 123.157337] ? __pfx_configfs_mkdir+0x10/0x10\n[ 123.157719] ? may_create_dentry+0x242/0x2e0\n[ 123.158061] vfs_mkdir+0x2a9/0x6c0\n[ 123.158352] filename_mkdirat+0x3dc/0x500\n[ 123.158710] ? __pfx_filename_mkdirat+0x10/0x10\n[ 123.159070] ? strncpy_from_user+0x3a/0x1d0\n[ 123.159413] __x64_sys_mkdir+0x6b/0x90\n[ 123.159760] do_syscall_64+0xea/0x600\n\nReplace the runtime mutex_init(&lock) with a static DEFINE_MUTEX(lock)\ndeclaration to fix this issue."}], "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": "49c3b9266a718dbd73c42e004288b4bb2ea0ac0b", "lessThan": "f9f4ca45c770b7eec83fea6c9b727b26e691b513", "status": "affected", "versionType": "git"}, {"version": "49c3b9266a718dbd73c42e004288b4bb2ea0ac0b", "lessThan": "349903f7ee72f7ac5b7a98840d701b2082d140a3", "status": "affected", "versionType": "git"}, {"version": "49c3b9266a718dbd73c42e004288b4bb2ea0ac0b", "lessThan": "0a8c2f7b95981913ac370683e34db4906970c210", "status": "affected", "versionType": "git"}, {"version": "49c3b9266a718dbd73c42e004288b4bb2ea0ac0b", "lessThan": "c7dea90c9b4ef1dfbd2e4df36de180c76fd7c33c", "status": "affected", "versionType": "git"}, {"version": "49c3b9266a718dbd73c42e004288b4bb2ea0ac0b", "lessThan": "234117949da3b3f9705a21b66094f9f30bbe681d", "status": "affected", "versionType": "git"}, {"version": "49c3b9266a718dbd73c42e004288b4bb2ea0ac0b", "lessThan": "017dac7670909eaea3eb36e6b3b5a8be9ce0a14d", "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": "5.19", "status": "affected"}, {"version": "0", "lessThan": "5.19", "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": "5.19", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f9f4ca45c770b7eec83fea6c9b727b26e691b513"}, {"url": "https://git.kernel.org/stable/c/349903f7ee72f7ac5b7a98840d701b2082d140a3"}, {"url": "https://git.kernel.org/stable/c/0a8c2f7b95981913ac370683e34db4906970c210"}, {"url": "https://git.kernel.org/stable/c/c7dea90c9b4ef1dfbd2e4df36de180c76fd7c33c"}, {"url": "https://git.kernel.org/stable/c/234117949da3b3f9705a21b66094f9f30bbe681d"}, {"url": "https://git.kernel.org/stable/c/017dac7670909eaea3eb36e6b3b5a8be9ce0a14d"}], "title": "null_blk: use DEFINE_MUTEX for the file-scope mutex", "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": "f9f4ca45c770b7eec83fea6c9b727b26e691b513", "status": "affected", "version": "49c3b9266a718dbd73c42e004288b4bb2ea0ac0b", "versionType": "git"}, {"lessThan": "349903f7ee72f7ac5b7a98840d701b2082d140a3", "status": "affected", "version": "49c3b9266a718dbd73c42e004288b4bb2ea0ac0b", "versionType": "git"}, {"lessThan": "0a8c2f7b95981913ac370683e34db4906970c210", "status": "affected", "version": "49c3b9266a718dbd73c42e004288b4bb2ea0ac0b", "versionType": "git"}, {"lessThan": "c7dea90c9b4ef1dfbd2e4df36de180c76fd7c33c", "status": "affected", "version": "49c3b9266a718dbd73c42e004288b4bb2ea0ac0b", "versionType": "git"}, {"lessThan": "234117949da3b3f9705a21b66094f9f30bbe681d", "status": "affected", "version": "49c3b9266a718dbd73c42e004288b4bb2ea0ac0b", "versionType": "git"}, {"lessThan": "017dac7670909eaea3eb36e6b3b5a8be9ce0a14d", "status": "affected", "version": "49c3b9266a718dbd73c42e004288b4bb2ea0ac0b", "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": "5.19"}, {"lessThan": "5.19", "status": "unaffected", "version": "0", "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\nnull_blk: use DEFINE_MUTEX for the file-scope mutex\n\nIn null_init(), mutex_init(&lock) currently happens after\nconfigfs_register_subsystem(), which exposes the nullb subsystem to\nuserspace. A racing mkdir() into /sys/kernel/config/nullb/ can reach\nnull_find_dev_by_name() -> mutex_lock(&lock) before the mutex is\ninitialized, trigger warning:\n\n[ 123.137788] DEBUG_LOCKS_WARN_ON(lock->magic != lock)\n[ 123.137796] WARNING: kernel/locking/mutex.c:159 at mutex_lock+0x171/0x1c0, CPU#13: mkdir/1301\n[ 123.140090] Modules linked in: null_blk(+) nft_fib_inet nft_fib_ipv4\n......\n[ 123.154926] Call Trace:\n[ 123.155172] <TASK>\n[ 123.155419] ? __pfx_mutex_lock+0x10/0x10\n[ 123.156181] ? __pfx__raw_spin_lock+0x10/0x10\n[ 123.156571] nullb_group_make_group+0x20/0x100 [null_blk]\n[ 123.157011] configfs_mkdir+0x47b/0xc70\n[ 123.157337] ? __pfx_configfs_mkdir+0x10/0x10\n[ 123.157719] ? may_create_dentry+0x242/0x2e0\n[ 123.158061] vfs_mkdir+0x2a9/0x6c0\n[ 123.158352] filename_mkdirat+0x3dc/0x500\n[ 123.158710] ? __pfx_filename_mkdirat+0x10/0x10\n[ 123.159070] ? strncpy_from_user+0x3a/0x1d0\n[ 123.159413] __x64_sys_mkdir+0x6b/0x90\n[ 123.159760] do_syscall_64+0xea/0x600\n\nReplace the runtime mutex_init(&lock) with a static DEFINE_MUTEX(lock)\ndeclaration to fix this issue."}], "id": "CVE-2026-90190", "lastModified": "2026-10-19T09:19:09.013", "metrics": {}, "published": "2026-09-17T17:17:13.670", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/017dac7670909eaea3eb36e6b3b5a8be9ce0a14d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0a8c2f7b95981913ac370683e34db4906970c210"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/234117949da3b3f9705a21b66094f9f30bbe681d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/349903f7ee72f7ac5b7a98840d701b2082d140a3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c7dea90c9b4ef1dfbd2e4df36de180c76fd7c33c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f9f4ca45c770b7eec83fea6c9b727b26e691b513"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[49c3b9266a718dbd73c42e004288b4bb2ea0ac0b,f9f4ca45c770b7eec83fea6c9b727b26e691b513)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[49c3b9266a718dbd73c42e004288b4bb2ea0ac0b,349903f7ee72f7ac5b7a98840d701b2082d140a3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[49c3b9266a718dbd73c42e004288b4bb2ea0ac0b,0a8c2f7b95981913ac370683e34db4906970c210)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[49c3b9266a718dbd73c42e004288b4bb2ea0ac0b,c7dea90c9b4ef1dfbd2e4df36de180c76fd7c33c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[49c3b9266a718dbd73c42e004288b4bb2ea0ac0b,234117949da3b3f9705a21b66094f9f30bbe681d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[49c3b9266a718dbd73c42e004288b4bb2ea0ac0b,017dac7670909eaea3eb36e6b3b5a8be9ce0a14d)"}}], "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": "5.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.188,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"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": "generic", "value": "[0,*]"}}], "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": "2026-09-18T21:00:14.991421+00:00", "updated": "2026-09-20T02:15:17.053552+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-665", "CWE-367"]}