CVE-2026-23434 (GCVE-0-2026-23434)
Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-09-08 08:46
VLAI
EPSS
VEX
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)
Assigner
References
10 references
Impacted products
8 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 | |
| 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 | |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
guessed | |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
guessed |
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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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"scope": "UNCHANGED",
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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",
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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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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.
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