CVE-2024-46791 (GCVE-0-2024-46791)
Vulnerability from cvelistv5 – Published: 2024-09-18 07:12 – Updated: 2026-05-11 20:36
VLAI
EPSS
VEX
Title
can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open
Summary
In the Linux kernel, the following vulnerability has been resolved:
can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open
The mcp251x_hw_wake() function is called with the mpc_lock mutex held and
disables the interrupt handler so that no interrupts can be processed while
waking the device. If an interrupt has already occurred then waiting for
the interrupt handler to complete will deadlock because it will be trying
to acquire the same mutex.
CPU0 CPU1
---- ----
mcp251x_open()
mutex_lock(&priv->mcp_lock)
request_threaded_irq()
<interrupt>
mcp251x_can_ist()
mutex_lock(&priv->mcp_lock)
mcp251x_hw_wake()
disable_irq() <-- deadlock
Use disable_irq_nosync() instead because the interrupt handler does
everything while holding the mutex so it doesn't matter if it's still
running.
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-29 14:23 UTC
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
8ce8c0abcba314e1fe954a1840f6568bf5aef2ef , < 3a49b6b1caf5cefc05264d29079d52c99cb188e0
(git)
Affected: 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef , < 513c8fc189b52f7922e36bdca58997482b198f0e (git) Affected: 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef , < f7ab9e14b23a3eac6714bdc4dba244d8aa1ef646 (git) Affected: 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef , < 8fecde9c3f9a4b97b68bb97c9f47e5b662586ba7 (git) Affected: 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef , < e554113a1cd2a9cfc6c7af7bdea2141c5757e188 (git) Affected: 8ce8c0abcba314e1fe954a1840f6568bf5aef2ef , < 7dd9c26bd6cf679bcfdef01a8659791aa6487a29 (git) |
guessed | |
| Linux | Linux |
Affected:
5.5
Unaffected: 0 , < 5.5 (semver) Unaffected: 5.10.226 , ≤ 5.10.* (semver) Unaffected: 5.15.167 , ≤ 5.15.* (semver) Unaffected: 6.1.110 , ≤ 6.1.* (semver) Unaffected: 6.6.51 , ≤ 6.6.* (semver) Unaffected: 6.10.10 , ≤ 6.10.* (semver) Unaffected: 6.11 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open\n\nThe mcp251x_hw_wake() function is called with the mpc_lock mutex held and\ndisables the interrupt handler so that no interrupts can be processed while\nwaking the device. If an interrupt has already occurred then waiting for\nthe interrupt handler to complete will deadlock because it will be trying\nto acquire the same mutex.\n\nCPU0 CPU1\n---- ----\nmcp251x_open()\n mutex_lock(\u0026priv-\u003emcp_lock)\n request_threaded_irq()\n \u003cinterrupt\u003e\n mcp251x_can_ist()\n mutex_lock(\u0026priv-\u003emcp_lock)\n mcp251x_hw_wake()\n disable_irq() \u003c-- deadlock\n\nUse disable_irq_nosync() instead because the interrupt handler does\neverything while holding the mutex so it doesn\u0027t matter if it\u0027s still\nrunning."
},
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: mcp251x: soluciona el bloqueo si se produce una interrupci\u00f3n durante mcp251x_open La funci\u00f3n mcp251x_hw_wake() se llama con el mutex mpc_lock retenido y desactiva el controlador de interrupciones para que no se puedan procesar interrupciones mientras se activa el dispositivo. Si ya se produjo una interrupci\u00f3n, esperar a que se complete el controlador de interrupciones provocar\u00e1 un bloqueo porque intentar\u00e1 adquirir el mismo mutex. CPU0 CPU1 ---- ---- mcp251x_open() mutex_lock(\u0026amp;priv-\u0026gt;mcp_lock) request_threaded_irq() mcp251x_can_ist() mutex_lock(\u0026amp;priv-\u0026gt;mcp_lock) mcp251x_hw_wake() deshabilitar_irq() \u0026lt;-- bloqueo Utilice deshabilitar_irq_nosync() en su lugar porque el controlador de interrupciones hace todo mientras mantiene el mutex, por lo que no importa si todav\u00eda se est\u00e1 ejecutando."
}
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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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