fkie_cve-2024-39461
Vulnerability from fkie_nvd
Published
2024-06-25 15:15
Modified
2024-11-21 09:27
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
clk: bcm: rpi: Assign ->num before accessing ->hws
Commit f316cdff8d67 ("clk: Annotate struct clk_hw_onecell_data with
__counted_by") annotated the hws member of 'struct clk_hw_onecell_data'
with __counted_by, which informs the bounds sanitizer about the number
of elements in hws, so that it can warn when hws is accessed out of
bounds. As noted in that change, the __counted_by member must be
initialized with the number of elements before the first array access
happens, otherwise there will be a warning from each access prior to the
initialization because the number of elements is zero. This occurs in
raspberrypi_discover_clocks() due to ->num being assigned after ->hws
has been accessed:
UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-raspberrypi.c:374:4
index 3 is out of range for type 'struct clk_hw *[] __counted_by(num)' (aka 'struct clk_hw *[]')
Move the ->num initialization to before the first access of ->hws, which
clears up the warning.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * |
{
"configurations": [
{
"nodes": [
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"matchCriteriaId": "AC0C6E24-8240-425A-BD1A-F78E6D3A67FC",
"versionEndExcluding": "6.6.34",
"versionStartIncluding": "6.6",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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}
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"negate": false,
"operator": "OR"
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nclk: bcm: rpi: Assign -\u003enum before accessing -\u003ehws\n\nCommit f316cdff8d67 (\"clk: Annotate struct clk_hw_onecell_data with\n__counted_by\") annotated the hws member of \u0027struct clk_hw_onecell_data\u0027\nwith __counted_by, which informs the bounds sanitizer about the number\nof elements in hws, so that it can warn when hws is accessed out of\nbounds. As noted in that change, the __counted_by member must be\ninitialized with the number of elements before the first array access\nhappens, otherwise there will be a warning from each access prior to the\ninitialization because the number of elements is zero. This occurs in\nraspberrypi_discover_clocks() due to -\u003enum being assigned after -\u003ehws\nhas been accessed:\n\n UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-raspberrypi.c:374:4\n index 3 is out of range for type \u0027struct clk_hw *[] __counted_by(num)\u0027 (aka \u0027struct clk_hw *[]\u0027)\n\nMove the -\u003enum initialization to before the first access of -\u003ehws, which\nclears up the warning."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: clk: bcm: rpi: Assign -\u0026gt;num before accessing -\u0026gt;hws Commit f316cdff8d67 (\"clk: Annotate struct clk_hw_onecell_data with __counted_by\") anot\u00f3 el miembro hws de \u0027struct clk_hw_onecell_data\u0027 con __counted_by, que informa al sanitizante de los l\u00edmites sobre la cantidad de elementos en hws, para que pueda advertir cuando se accede a hws fuera de los l\u00edmites. Como se se\u00f1al\u00f3 en ese cambio, el miembro __counted_by debe inicializarse con la cantidad de elementos antes de que ocurra el primer acceso a la matriz; de lo contrario, habr\u00e1 una advertencia de cada acceso antes de la inicializaci\u00f3n porque la cantidad de elementos es cero. Esto ocurre en raspberrypi_discover_clocks() debido a que -\u0026gt;num se asigna despu\u00e9s de que se haya accedido a -\u0026gt;hws: UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-raspberrypi.c:374:4 index 3 est\u00e1 fuera del rango para el tipo \u0027struct clk_hw *[] __counted_by(num)\u0027 (tambi\u00e9n conocido como \u0027struct clk_hw *[]\u0027) Mueva la inicializaci\u00f3n -\u0026gt;num antes del primer acceso de -\u0026gt;hws, lo que borra la advertencia."
}
],
"id": "CVE-2024-39461",
"lastModified": "2024-11-21T09:27:42.720",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2024-06-25T15:15:14.500",
"references": [
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/6dc445c1905096b2ed4db1a84570375b4e00cc0f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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"url": "https://git.kernel.org/stable/c/9562dbe5cdbb16ac887d27ef6f179980bb99193c"
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"url": "https://git.kernel.org/stable/c/cdf9c7871d58d3df59d2775982e3533adb8ec920"
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"tags": [
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"url": "https://git.kernel.org/stable/c/9562dbe5cdbb16ac887d27ef6f179980bb99193c"
},
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"source": "af854a3a-2127-422b-91ae-364da2661108",
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"url": "https://git.kernel.org/stable/c/cdf9c7871d58d3df59d2775982e3533adb8ec920"
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],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-129"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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