{"api_version":"1","generated_at":"2026-07-23T13:03:29+00:00","cve":"CVE-2026-23032","urls":{"html":"https://cve.report/CVE-2026-23032","api":"https://cve.report/api/cve/CVE-2026-23032.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-23032","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-23032"},"summary":{"title":"null_blk: fix kmemleak by releasing references to fault configfs items","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: fix kmemleak by releasing references to fault configfs items\n\nWhen CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION is enabled, the null-blk\ndriver sets up fault injection support by creating the timeout_inject,\nrequeue_inject, and init_hctx_fault_inject configfs items as children\nof the top-level nullbX configfs group.\n\nHowever, when the nullbX device is removed, the references taken to\nthese fault-config configfs items are not released. As a result,\nkmemleak reports a memory leak, for example:\n\nunreferenced object 0xc00000021ff25c40 (size 32):\n  comm \"mkdir\", pid 10665, jiffies 4322121578\n  hex dump (first 32 bytes):\n    69 6e 69 74 5f 68 63 74 78 5f 66 61 75 6c 74 5f  init_hctx_fault_\n    69 6e 6a 65 63 74 00 88 00 00 00 00 00 00 00 00  inject..........\n  backtrace (crc 1a018c86):\n    __kmalloc_node_track_caller_noprof+0x494/0xbd8\n    kvasprintf+0x74/0xf4\n    config_item_set_name+0xf0/0x104\n    config_group_init_type_name+0x48/0xfc\n    fault_config_init+0x48/0xf0\n    0xc0080000180559e4\n    configfs_mkdir+0x304/0x814\n    vfs_mkdir+0x49c/0x604\n    do_mkdirat+0x314/0x3d0\n    sys_mkdir+0xa0/0xd8\n    system_call_exception+0x1b0/0x4f0\n    system_call_vectored_common+0x15c/0x2ec\n\nFix this by explicitly releasing the references to the fault-config\nconfigfs items when dropping the reference to the top-level nullbX\nconfigfs group.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-01-31 12:16:06","updated_at":"2026-06-02 14:16:46"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/1a3286edf4d48ce37f8982ff3c3b65159a5ecbb2","name":"https://git.kernel.org/stable/c/1a3286edf4d48ce37f8982ff3c3b65159a5ecbb2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/40b94ec7edbbb867c4e26a1a43d2b898f04b93c5","name":"https://git.kernel.org/stable/c/40b94ec7edbbb867c4e26a1a43d2b898f04b93c5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-253495.html","name":"https://cert-portal.siemens.com/productcert/html/ssa-253495.html","refsource":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d59ba448ccd595d5d65e197216cf781a87db2b28","name":"https://git.kernel.org/stable/c/d59ba448ccd595d5d65e197216cf781a87db2b28","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f1718da051282698aa8fa150bebb9724f6389fda","name":"https://git.kernel.org/stable/c/f1718da051282698aa8fa150bebb9724f6389fda","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-23032","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23032","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea 1a3286edf4d48ce37f8982ff3c3b65159a5ecbb2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea d59ba448ccd595d5d65e197216cf781a87db2b28 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea f1718da051282698aa8fa150bebb9724f6389fda git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea 40b94ec7edbbb867c4e26a1a43d2b898f04b93c5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.4","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.4 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.122 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.67 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.7 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19 * original_commit_for_fix","platforms":[]},{"source":"ADP","vendor":"Siemens","product":"RUGGEDCOM RST2428P","version":"affected V4.0 custom","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"23032","cve":"CVE-2026-23032","epss":"0.000130000","percentile":"0.022430000","score_date":"2026-06-08","updated_at":"2026-06-09 00:12:52"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"affected":[{"defaultStatus":"unknown","product":"RUGGEDCOM RST2428P","vendor":"Siemens","versions":[{"lessThan":"V4.0","status":"affected","version":"0","versionType":"custom"}]}],"providerMetadata":{"dateUpdated":"2026-06-02T13:00:53.339Z","orgId":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","shortName":"siemens-SADP"},"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-253495.html"}],"x_adpType":"supplier"}],"cna":{"affected":[{"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":"1a3286edf4d48ce37f8982ff3c3b65159a5ecbb2","status":"affected","version":"bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea","versionType":"git"},{"lessThan":"d59ba448ccd595d5d65e197216cf781a87db2b28","status":"affected","version":"bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea","versionType":"git"},{"lessThan":"f1718da051282698aa8fa150bebb9724f6389fda","status":"affected","version":"bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea","versionType":"git"},{"lessThan":"40b94ec7edbbb867c4e26a1a43d2b898f04b93c5","status":"affected","version":"bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea","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":"6.4"},{"lessThan":"6.4","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.122","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.67","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.19","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.122","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.67","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.7","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19","versionStartIncluding":"6.4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: fix kmemleak by releasing references to fault configfs items\n\nWhen CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION is enabled, the null-blk\ndriver sets up fault injection support by creating the timeout_inject,\nrequeue_inject, and init_hctx_fault_inject configfs items as children\nof the top-level nullbX configfs group.\n\nHowever, when the nullbX device is removed, the references taken to\nthese fault-config configfs items are not released. As a result,\nkmemleak reports a memory leak, for example:\n\nunreferenced object 0xc00000021ff25c40 (size 32):\n  comm \"mkdir\", pid 10665, jiffies 4322121578\n  hex dump (first 32 bytes):\n    69 6e 69 74 5f 68 63 74 78 5f 66 61 75 6c 74 5f  init_hctx_fault_\n    69 6e 6a 65 63 74 00 88 00 00 00 00 00 00 00 00  inject..........\n  backtrace (crc 1a018c86):\n    __kmalloc_node_track_caller_noprof+0x494/0xbd8\n    kvasprintf+0x74/0xf4\n    config_item_set_name+0xf0/0x104\n    config_group_init_type_name+0x48/0xfc\n    fault_config_init+0x48/0xf0\n    0xc0080000180559e4\n    configfs_mkdir+0x304/0x814\n    vfs_mkdir+0x49c/0x604\n    do_mkdirat+0x314/0x3d0\n    sys_mkdir+0xa0/0xd8\n    system_call_exception+0x1b0/0x4f0\n    system_call_vectored_common+0x15c/0x2ec\n\nFix this by explicitly releasing the references to the fault-config\nconfigfs items when dropping the reference to the top-level nullbX\nconfigfs group."}],"providerMetadata":{"dateUpdated":"2026-05-11T21:58:41.157Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/1a3286edf4d48ce37f8982ff3c3b65159a5ecbb2"},{"url":"https://git.kernel.org/stable/c/d59ba448ccd595d5d65e197216cf781a87db2b28"},{"url":"https://git.kernel.org/stable/c/f1718da051282698aa8fa150bebb9724f6389fda"},{"url":"https://git.kernel.org/stable/c/40b94ec7edbbb867c4e26a1a43d2b898f04b93c5"}],"title":"null_blk: fix kmemleak by releasing references to fault configfs items","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-23032","datePublished":"2026-01-31T11:42:11.640Z","dateReserved":"2026-01-13T15:37:45.942Z","dateUpdated":"2026-06-02T13:00:53.339Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-01-31 12:16:06","lastModifiedDate":"2026-06-02 14:16:46","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"23032","Ordinal":"1","Title":"null_blk: fix kmemleak by releasing references to fault configfs","CVE":"CVE-2026-23032","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"23032","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: fix kmemleak by releasing references to fault configfs items\n\nWhen CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION is enabled, the null-blk\ndriver sets up fault injection support by creating the timeout_inject,\nrequeue_inject, and init_hctx_fault_inject configfs items as children\nof the top-level nullbX configfs group.\n\nHowever, when the nullbX device is removed, the references taken to\nthese fault-config configfs items are not released. As a result,\nkmemleak reports a memory leak, for example:\n\nunreferenced object 0xc00000021ff25c40 (size 32):\n  comm \"mkdir\", pid 10665, jiffies 4322121578\n  hex dump (first 32 bytes):\n    69 6e 69 74 5f 68 63 74 78 5f 66 61 75 6c 74 5f  init_hctx_fault_\n    69 6e 6a 65 63 74 00 88 00 00 00 00 00 00 00 00  inject..........\n  backtrace (crc 1a018c86):\n    __kmalloc_node_track_caller_noprof+0x494/0xbd8\n    kvasprintf+0x74/0xf4\n    config_item_set_name+0xf0/0x104\n    config_group_init_type_name+0x48/0xfc\n    fault_config_init+0x48/0xf0\n    0xc0080000180559e4\n    configfs_mkdir+0x304/0x814\n    vfs_mkdir+0x49c/0x604\n    do_mkdirat+0x314/0x3d0\n    sys_mkdir+0xa0/0xd8\n    system_call_exception+0x1b0/0x4f0\n    system_call_vectored_common+0x15c/0x2ec\n\nFix this by explicitly releasing the references to the fault-config\nconfigfs items when dropping the reference to the top-level nullbX\nconfigfs group.","Type":"Description","Title":"null_blk: fix kmemleak by releasing references to fault configfs"}]}}}