CVE-2024-55639 (GCVE-0-2024-55639)
Vulnerability from cvelistv5 – Published: 2025-01-11 12:29 – Updated: 2026-08-05 11:44
VLAI
EPSS
VEX
Title
net: renesas: rswitch: avoid use-after-put for a device tree node
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: renesas: rswitch: avoid use-after-put for a device tree node
The device tree node saved in the rswitch_device structure is used at
several driver locations. So passing this node to of_node_put() after
the first use is wrong.
Move of_node_put() for this node to exit paths.
Severity
8.4 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
b46f1e5793298c67efc2f1b917350a2cefacf9d6 , < bf8c6755f02029d1eddc3ff19b870240f054afc7
(git)
Affected: b46f1e5793298c67efc2f1b917350a2cefacf9d6 , < 92007a28f95413058a7268dc84e5f44b700165d1 (git) Affected: b46f1e5793298c67efc2f1b917350a2cefacf9d6 , < 66b7e9f85b8459c823b11e9af69dbf4be5eb6be8 (git) |
guessed | |
| Linux | Linux |
Affected:
6.3
Unaffected: 0 , < 6.3 (semver) Unaffected: 6.6.67 , ≤ 6.6.* (semver) Unaffected: 6.12.6 , ≤ 6.12.* (semver) Unaffected: 6.13 , ≤ * (original_commit_for_fix) |
guessed |
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}
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"value": "AV:L - The affected code is entirely in the rswitch platform driver\u0027s probe/init path (`rswitch_probe()` \u2192 `rswitch_init()` \u2192 `rswitch_device_alloc()`/`rswitch_ether_port_init_all()`), reached through local device/driver lifecycle events such as module load, sysfs bind, or device-tree overlay attach \u2014 never from network traffic.\nAC:L - The premature `of_node_put()` executes unconditionally on every probe, so the dangling reference is created deterministically with no race to win and no memory-layout precondition; an attacker able to drive overlay attach/detach or driver rebind controls both the probe and the node teardown.\nPR:N - The vulnerable sequence runs automatically during driver probe at boot or on device-tree overlay/hotplug attach, requiring no authenticated account or credential for the dangling-reference window to be created, consistent with how comparable probe-path OF-node use-after-free issues are scored.\nUI:N - Probe and port initialization happen autonomously as part of device enumeration; no victim must open a file, mount anything, or take any other action.\nS:U - The freed `struct device_node` and all consequences of dereferencing it remain within the kernel\u0027s own security authority, with no crossing into a hypervisor, IOMMU, or other separate security scope.\nC:H - Use-after-free on a device-tree node lets reclaimed heap contents be interpreted as `struct device_node`/property lists by `of_get_phy_mode()`, `of_property_read_u32()`, and `of_parse_phandle()`, yielding attacker-directed pointer dereferences and disclosure of arbitrary kernel memory.\nI:H - The same UAF gives control over a freed object that is subsequently walked and passed to `devm_of_phy_get()` and phandle resolution, so heap spraying the reclaimed allocation provides write/control-flow-hijack primitives; the refcount imbalance additionally corrupts kobject state.\nA:H - Dereferencing the released node reliably produces a kernel oops or panic, and on static base-tree nodes the imbalance triggers the `refcount_t: underflow; use-after-free` path in `of_node_release()`, leaving the network device unusable on an automotive/embedded gateway SoC."
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{
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},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: renesas: rswitch: evitar el uso posterior a la ejecuci\u00f3n de un nodo del \u00e1rbol de dispositivos El nodo del \u00e1rbol de dispositivos guardado en la estructura rswitch_device se utiliza en varias ubicaciones de controladores. Por lo tanto, pasar este nodo a of_node_put() despu\u00e9s del primer uso es incorrecto. Mueva of_node_put() para este nodo a las rutas de salida."
}
],
"id": "CVE-2024-55639",
"lastModified": "2026-08-04T11:22:08.447",
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"id": "CVE-2024-55639",
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"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: net: renesas: rswitch: avoid use-after-put for a device tree node",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-55639.json",
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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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