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CVE-2026-23434 (GCVE-0-2026-23434)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-09-08 08:46
VLAI
Title
mtd: rawnand: serialize lock/unlock against other NAND operations
Summary
In the Linux kernel, the following vulnerability has been resolved: mtd: rawnand: serialize lock/unlock against other NAND operations nand_lock() and nand_unlock() call into chip->ops.lock_area/unlock_area without holding the NAND device lock. On controllers that implement SET_FEATURES via multiple low-level PIO commands, these can race with concurrent UBI/UBIFS background erase/write operations that hold the device lock, resulting in cmd_pending conflicts on the NAND controller. Add nand_get_device()/nand_release_device() around the lock/unlock operations to serialize them against all other NAND controller access.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 92270086b7e5ada7ab381c06cc3da2e95ed17088 , < 28ea836cc44cb8b89c1c174707ead0c1133c60e9 (git)
Affected: 92270086b7e5ada7ab381c06cc3da2e95ed17088 , < fe4a73c3dd48308149d57a10c2761e1d36ced7ba (git)
Affected: 92270086b7e5ada7ab381c06cc3da2e95ed17088 , < ce5229e78078e437704157eb542f43a6f83b429b (git)
Affected: 92270086b7e5ada7ab381c06cc3da2e95ed17088 , < a80291e577b44593a724d6cd64c14337c78f194d (git)
Affected: 92270086b7e5ada7ab381c06cc3da2e95ed17088 , < f71ce0ae5aefe39dd5b2f996c0e08550d2153ad2 (git)
Affected: 92270086b7e5ada7ab381c06cc3da2e95ed17088 , < 5fd5c078af23cb353507aa522e09d557d7eaef04 (git)
Affected: 92270086b7e5ada7ab381c06cc3da2e95ed17088 , < f25446e2c28939753d3b62d34dfda49952b2557d (git)
Affected: 92270086b7e5ada7ab381c06cc3da2e95ed17088 , < bab2bc6e850a697a23b9e5f0e21bb8c187615e95 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.20 , ≤ 6.18.* (semver)
Unaffected: 6.19.10 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
guessed Create a notification for this product.
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
guessed Create a notification for this product.
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
guessed Create a notification for this product.
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            "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: rawnand: serialize lock/unlock against other NAND operations\n\nnand_lock() and nand_unlock() call into chip-\u003eops.lock_area/unlock_area\nwithout holding the NAND device lock. On controllers that implement\nSET_FEATURES via multiple low-level PIO commands, these can race with\nconcurrent UBI/UBIFS background erase/write operations that hold the\ndevice lock, resulting in cmd_pending conflicts on the NAND controller.\n\nAdd nand_get_device()/nand_release_device() around the lock/unlock\noperations to serialize them against all other NAND controller access."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmtd: rawnand: serializar bloqueo/desbloqueo contra otras operaciones NAND\n\nnand_lock() y nand_unlock() llaman a chip -\u003e ops.lock_area/unlock_area sin mantener el bloqueo del dispositivo NAND. En controladores que implementan SET_FEATURES a trav\u00e9s de m\u00faltiples comandos PIO de bajo nivel, estos pueden competir con operaciones concurrentes de borrado/escritura en segundo plano de UBI/UBIFS que mantienen el bloqueo del dispositivo, resultando en conflictos de cmd_pending en el controlador NAND.\n\nA\u00f1adir nand_get_device()/nand_release_device() alrededor de las operaciones de bloqueo/desbloqueo para serializarlas contra todo otro acceso al controlador NAND."
          }
        ],
        "id": "CVE-2026-23434",
        "lastModified": "2026-07-24T21:10:00.143",
        "metrics": {
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                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.1,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
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              "source": "nvd@nist.gov",
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    "redhat_vex": {
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      "current_release_date": "2026-06-30T11:52:53+00:00",
      "cve": "CVE-2026-23434",
      "id": "CVE-2026-23434",
      "initial_release_date": "2026-04-03T00:00:00+00:00",
      "product_status:known_affected": "108",
      "product_status:known_not_affected": "166",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mtd: rawnand: serialize lock/unlock against other NAND operations",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23434.json",
      "version": "3"
    },
    "suse_vex": {
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      "current_release_date": "2026-09-09T00:24:09Z",
      "cve": "CVE-2026-23434",
      "id": "CVE-2026-23434",
      "initial_release_date": "2026-04-03T23:27:54Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "151",
      "product_status:known_not_affected": "200",
      "product_status:recommended": "280",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-23434",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23434.json",
      "version": "12"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.