cve-2024-39462
Vulnerability from cvelistv5
Published
2024-06-25 14:25
Modified
2024-12-19 09:06
Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
clk: bcm: dvp: 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
clk_dvp_probe() due to ->num being assigned after ->hws has been
accessed:
UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-bcm2711-dvp.c:59:2
index 0 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
{
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"title": "clk: bcm: dvp: Assign -\u003enum before accessing -\u003ehws",
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"datePublished": "2024-06-25T14:25:02.196Z",
"dateReserved": "2024-06-25T14:23:23.744Z",
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"nvd": "{\"cve\":{\"id\":\"CVE-2024-39462\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-25T15:15:14.580\",\"lastModified\":\"2024-11-21T09:27:42.857\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nclk: bcm: dvp: 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\\nclk_dvp_probe() due to -\u003enum being assigned after -\u003ehws has been\\naccessed:\\n\\n UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-bcm2711-dvp.c:59:2\\n index 0 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: dvp: 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 clk_dvp_probe() 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-bcm2711-dvp.c:59:2 El \u00edndice 0 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. .\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-400\"}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0dc913217fb79096597005bba9ba738e2db5cd02\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9368cdf90f52a68120d039887ccff74ff33b4444\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a1dd92fca0d6b58b55ed0484f75d4205dbb77010\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0dc913217fb79096597005bba9ba738e2db5cd02\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/9368cdf90f52a68120d039887ccff74ff33b4444\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/a1dd92fca0d6b58b55ed0484f75d4205dbb77010\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
}
}
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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.
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- 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.