CVE-2024-39462
clk: bcm: dvp: Assign ->num before accessing ->hws
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: clk: bcm: dvp: Assign ->num before accessing ->hws Commit f316cdff8d67 ("clk: Annotate struct clk_hw_onecell_data with __counted_by") anotó el miembro hws de 'struct clk_hw_onecell_data' con __counted_by, que informa al sanitizante de los límites sobre la cantidad de elementos en hws, para que pueda advertir cuando se accede a hws fuera de los límites. Como se señaló 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, habrá una advertencia de cada acceso antes de la inicialización porque la cantidad de elementos es cero. Esto ocurre en clk_dvp_probe() debido a que ->num se asigna después de que se haya accedido a ->hws: UBSAN: array-index-out-of-bounds in drivers/clk/bcm/clk-bcm2711-dvp.c:59:2 El índice 0 está fuera del rango para el tipo 'struct clk_hw *[] __counted_by(num)' (también conocido como 'struct clk_hw *[]'). Mueva la inicialización ->num antes del primer acceso de ->hws, lo que borra la advertencia. .
CVSS Scores
SSVC
- Decision:Attend
Timeline
- 2024-06-25 CVE Reserved
- 2024-06-25 CVE Published
- 2024-06-26 EPSS Updated
- 2024-11-05 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-400: Uncontrolled Resource Consumption
CAPEC
References (4)
URL | Tag | Source |
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https://git.kernel.org/stable/c/f316cdff8d677db9ad9c90acb44c4cd535b0ee27 | Vuln. Introduced |
URL | Date | SRC |
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URL | Date | SRC |
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Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.6 < 6.6.34 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.6 < 6.6.34" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.6 < 6.9.5 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.6 < 6.9.5" | en |
Affected
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Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.6 < 6.10 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.6 < 6.10" | en |
Affected
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