# CVE-2024-39461: linux: In the Linux kernel, the following vulnerability has been resolved:  clk: bcm: rpi: Assign ->num before accessing ->h...

CVE-2024-39461 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-39461, released June 25, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-39461
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 25, 2024

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.9.7-1 | [DEBIAN-CVE-2024-39461](https://patchblox.com/security/data/fix/linux/debian-cve-2024-39461.md) | Jun 25, 2024 |
| Linux | linux Debian 14 | 6.9.7-1 | [DEBIAN-CVE-2024-39461](https://patchblox.com/security/data/fix/linux/debian-cve-2024-39461.md) | Jun 25, 2024 |

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