{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23148", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.975Z", "datePublished": "2026-02-14T16:01:17.575Z", "dateUpdated": "2026-02-14T16:01:17.575Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-02-14T16:01:17.575Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: fix race in nvmet_bio_done() leading to NULL pointer dereference\n\nThere is a race condition in nvmet_bio_done() that can cause a NULL\npointer dereference in blk_cgroup_bio_start():\n\n1. nvmet_bio_done() is called when a bio completes\n2. nvmet_req_complete() is called, which invokes req->ops->queue_response(req)\n3. The queue_response callback can re-queue and re-submit the same request\n4. The re-submission reuses the same inline_bio from nvmet_req\n5. Meanwhile, nvmet_req_bio_put() (called after nvmet_req_complete)\n invokes bio_uninit() for inline_bio, which sets bio->bi_blkg to NULL\n6. The re-submitted bio enters submit_bio_noacct_nocheck()\n7. blk_cgroup_bio_start() dereferences bio->bi_blkg, causing a crash:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000028\n #PF: supervisor read access in kernel mode\n RIP: 0010:blk_cgroup_bio_start+0x10/0xd0\n Call Trace:\n submit_bio_noacct_nocheck+0x44/0x250\n nvmet_bdev_execute_rw+0x254/0x370 [nvmet]\n process_one_work+0x193/0x3c0\n worker_thread+0x281/0x3a0\n\nFix this by reordering nvmet_bio_done() to call nvmet_req_bio_put()\nBEFORE nvmet_req_complete(). This ensures the bio is cleaned up before\nthe request can be re-submitted, preventing the race condition."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/target/io-cmd-bdev.c"], "versions": [{"version": "431e58d56fcb5ff1f9eb630724a922e0d2a941df", "lessThan": "ee10b06980acca1d46e0fa36d6fb4a9578eab6e4", "status": "affected", "versionType": "git"}, {"version": "190f4c2c863af7cc5bb354b70e0805f06419c038", "lessThan": "68207ceefd71cc74ce4e983fa9bd10c3122e349b", "status": "affected", "versionType": "git"}, {"version": "190f4c2c863af7cc5bb354b70e0805f06419c038", "lessThan": "0fcee2cfc4b2e16e62ff8e0cc2cd8dd24efad65e", "status": "affected", "versionType": "git"}, {"version": "2e2028fcf924d1c6df017033c8d6e28b735a0508", "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/nvme/target/io-cmd-bdev.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.69", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.9", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19", "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": "6.12.37", "versionEndExcluding": "6.12.69"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "6.18.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "6.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15.6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ee10b06980acca1d46e0fa36d6fb4a9578eab6e4"}, {"url": "https://git.kernel.org/stable/c/68207ceefd71cc74ce4e983fa9bd10c3122e349b"}, {"url": "https://git.kernel.org/stable/c/0fcee2cfc4b2e16e62ff8e0cc2cd8dd24efad65e"}], "title": "nvmet: fix race in nvmet_bio_done() leading to NULL pointer dereference", "x_generator": {"engine": "bippy-1.2.0"}}}}

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The queue_response callback can re-queue and re-submit the same request\n4. The re-submission reuses the same inline_bio from nvmet_req\n5. Meanwhile, nvmet_req_bio_put() (called after nvmet_req_complete)\n invokes bio_uninit() for inline_bio, which sets bio->bi_blkg to NULL\n6. The re-submitted bio enters submit_bio_noacct_nocheck()\n7. blk_cgroup_bio_start() dereferences bio->bi_blkg, causing a crash:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000028\n #PF: supervisor read access in kernel mode\n RIP: 0010:blk_cgroup_bio_start+0x10/0xd0\n Call Trace:\n submit_bio_noacct_nocheck+0x44/0x250\n nvmet_bdev_execute_rw+0x254/0x370 [nvmet]\n process_one_work+0x193/0x3c0\n worker_thread+0x281/0x3a0\n\nFix this by reordering nvmet_bio_done() to call nvmet_req_bio_put()\nBEFORE nvmet_req_complete(). This ensures the bio is cleaned up before\nthe request can be re-submitted, preventing the race condition."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnvmet: corregir condici\u00f3n de carrera en nvmet_bio_done() que lleva a una desreferencia de puntero NULL\n\nExiste una condici\u00f3n de carrera en nvmet_bio_done() que puede causar una desreferencia de puntero NULL en blk_cgroup_bio_start():\n\n1. nvmet_bio_done() es llamada cuando un bio se completa\n2. nvmet_req_complete() es llamada, lo que invoca req->ops->queue_response(req)\n3. La devoluci\u00f3n de llamada queue_response puede volver a encolar y volver a enviar la misma solicitud\n4. El reenv\u00edo reutiliza el mismo inline_bio de nvmet_req\n5. Mientras tanto, nvmet_req_bio_put() (llamada despu\u00e9s de nvmet_req_complete) invoca bio_uninit() para inline_bio, lo que establece bio->bi_blkg en NULL\n6. El bio reenviado entra en submit_bio_noacct_nocheck()\n7. blk_cgroup_bio_start() desreferencia bio->bi_blkg, causando un fallo:\n\n ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000028\n #PF: acceso de lectura de supervisor en modo kernel\n RIP: 0010:blk_cgroup_bio_start+0x10/0xd0\n Rastro de Llamada:\n submit_bio_noacct_nocheck+0x44/0x250\n nvmet_bdev_execute_rw+0x254/0x370 [nvmet]\n process_one_work+0x193/0x3c0\n worker_thread+0x281/0x3a0\n\nCorregir esto reordenando nvmet_bio_done() para llamar a nvmet_req_bio_put() ANTES de nvmet_req_complete(). Esto asegura que el bio se limpie antes de que la solicitud pueda ser reenviada, previniendo la condici\u00f3n de carrera."}], "id": "CVE-2026-23148", "lastModified": "2026-03-17T21:12:43.220", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "[email protected]", "type": "Primary"}]}, "published": "2026-02-14T16:15:54.913", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0fcee2cfc4b2e16e62ff8e0cc2cd8dd24efad65e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/68207ceefd71cc74ce4e983fa9bd10c3122e349b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ee10b06980acca1d46e0fa36d6fb4a9578eab6e4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "[email protected]", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: nvmet: fix race in nvmet_bio_done() leading to NULL pointer dereference", "id": "2439904", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2439904"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2026-23148", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-02-14T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23148\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23148\nhttps://lore.kernel.org/linux-cve-announce/2026021413-CVE-2026-23148-bb5d@gregkh/T"], "threat_severity": "Important"}

{"created": "2026-02-16T12:01:19.467050+00:00", "updated": "2026-02-16T12:01:19.467134+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}