Vulnerability-Lookup

FKIE_CVE-2026-23148

Vulnerability from fkie_nvd - Published: 2026-02-14 16:15 - Updated: 2026-02-18 17:52

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: nvmet: fix race in nvmet_bio_done() leading to NULL pointer dereference There is a race condition in nvmet_bio_done() that can cause a NULL pointer dereference in blk_cgroup_bio_start(): 1. nvmet_bio_done() is called when a bio completes 2. nvmet_req_complete() is called, which invokes req->ops->queue_response(req) 3. The queue_response callback can re-queue and re-submit the same request 4. The re-submission reuses the same inline_bio from nvmet_req 5. Meanwhile, nvmet_req_bio_put() (called after nvmet_req_complete) invokes bio_uninit() for inline_bio, which sets bio->bi_blkg to NULL 6. The re-submitted bio enters submit_bio_noacct_nocheck() 7. blk_cgroup_bio_start() dereferences bio->bi_blkg, causing a crash: BUG: kernel NULL pointer dereference, address: 0000000000000028 #PF: supervisor read access in kernel mode RIP: 0010:blk_cgroup_bio_start+0x10/0xd0 Call Trace: submit_bio_noacct_nocheck+0x44/0x250 nvmet_bdev_execute_rw+0x254/0x370 [nvmet] process_one_work+0x193/0x3c0 worker_thread+0x281/0x3a0 Fix this by reordering nvmet_bio_done() to call nvmet_req_bio_put() BEFORE nvmet_req_complete(). This ensures the bio is cleaned up before the request can be re-submitted, preventing the race condition.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0fcee2cfc4b2e16e62ff8e0cc2cd8dd24efad65e
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/68207ceefd71cc74ce4e983fa9bd10c3122e349b
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ee10b06980acca1d46e0fa36d6fb4a9578eab6e4

Impacted products

	Vendor	Product	Version

JSON

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{
  "cveTags": [],
  "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-\u003eops-\u003equeue_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-\u003ebi_blkg to NULL\n6. The re-submitted bio enters submit_bio_noacct_nocheck()\n7. blk_cgroup_bio_start() dereferences bio-\u003ebi_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-\u0026gt;ops-\u0026gt;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-\u0026gt;bi_blkg en NULL\n6. El bio reenviado entra en submit_bio_noacct_nocheck()\n7. blk_cgroup_bio_start() desreferencia bio-\u0026gt;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": "2026-02-18T17:52:44.520",
  "metrics": {},
  "published": "2026-02-14T16:15:54.913",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0fcee2cfc4b2e16e62ff8e0cc2cd8dd24efad65e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/68207ceefd71cc74ce4e983fa9bd10c3122e349b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ee10b06980acca1d46e0fa36d6fb4a9578eab6e4"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

CVE-2026-23148 (GCVE-0-2026-23148)

Vulnerability from cvelistv5 – Published: 2026-02-14 16:01 – Updated: 2026-02-14 16:01

Title

nvmet: fix race in nvmet_bio_done() leading to NULL pointer dereference

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/ee10b06980acca1d4…
	https://git.kernel.org/stable/c/68207ceefd71cc74c…
	https://git.kernel.org/stable/c/0fcee2cfc4b2e16e6…

Impacted products

Vendor

Product

Version

Linux

Affected: 431e58d56fcb5ff1f9eb630724a922e0d2a941df , < ee10b06980acca1d46e0fa36d6fb4a9578eab6e4 (git)
Affected: 190f4c2c863af7cc5bb354b70e0805f06419c038 , < 68207ceefd71cc74ce4e983fa9bd10c3122e349b (git)
Affected: 190f4c2c863af7cc5bb354b70e0805f06419c038 , < 0fcee2cfc4b2e16e62ff8e0cc2cd8dd24efad65e (git)
Affected: 2e2028fcf924d1c6df017033c8d6e28b735a0508 (git)

Linux

Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.12.69 , ≤ 6.12.* (semver)
Unaffected: 6.18.9 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/target/io-cmd-bdev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ee10b06980acca1d46e0fa36d6fb4a9578eab6e4",
              "status": "affected",
              "version": "431e58d56fcb5ff1f9eb630724a922e0d2a941df",
              "versionType": "git"
            },
            {
              "lessThan": "68207ceefd71cc74ce4e983fa9bd10c3122e349b",
              "status": "affected",
              "version": "190f4c2c863af7cc5bb354b70e0805f06419c038",
              "versionType": "git"
            },
            {
              "lessThan": "0fcee2cfc4b2e16e62ff8e0cc2cd8dd24efad65e",
              "status": "affected",
              "version": "190f4c2c863af7cc5bb354b70e0805f06419c038",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "2e2028fcf924d1c6df017033c8d6e28b735a0508",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/target/io-cmd-bdev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.69",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.9",
              "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": "6.12.69",
                  "versionStartIncluding": "6.12.37",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.9",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.15.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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-\u003eops-\u003equeue_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-\u003ebi_blkg to NULL\n6. The re-submitted bio enters submit_bio_noacct_nocheck()\n7. blk_cgroup_bio_start() dereferences bio-\u003ebi_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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-14T16:01:17.575Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23148",
    "datePublished": "2026-02-14T16:01:17.575Z",
    "dateReserved": "2026-01-13T15:37:45.975Z",
    "dateUpdated": "2026-02-14T16:01:17.575Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-23148

CVE-2026-23148 (GCVE-0-2026-23148)

Tags

Sightings

Nomenclature