CVE-2024-39462
clk: bcm: dvp: Assign ->num before accessing ->hws
Description
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.
INFO
Published Date :
June 25, 2024, 3:15 p.m.
Last Modified :
March 24, 2025, 5:24 p.m.
Remotely Exploit :
Yes !
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update the Linux kernel to a non-vulnerable version.
- Reboot the system after applying the update.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-39462.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-39462 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-39462
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-39462 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-39462 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Mar. 24, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.6 up to (excluding) 6.6.34 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.9.5 Added Reference Type CVE: https://git.kernel.org/stable/c/0dc913217fb79096597005bba9ba738e2db5cd02 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/0dc913217fb79096597005bba9ba738e2db5cd02 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/9368cdf90f52a68120d039887ccff74ff33b4444 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9368cdf90f52a68120d039887ccff74ff33b4444 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/a1dd92fca0d6b58b55ed0484f75d4205dbb77010 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a1dd92fca0d6b58b55ed0484f75d4205dbb77010 Types: Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/0dc913217fb79096597005bba9ba738e2db5cd02 Added Reference https://git.kernel.org/stable/c/9368cdf90f52a68120d039887ccff74ff33b4444 Added Reference https://git.kernel.org/stable/c/a1dd92fca0d6b58b55ed0484f75d4205dbb77010 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 03, 2024
Action Type Old Value New Value Added CWE CISA-ADP CWE-400 Added CVSS V3.1 CISA-ADP AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 25, 2024
Action Type Old Value New Value Added Description 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. Added Reference kernel.org https://git.kernel.org/stable/c/0dc913217fb79096597005bba9ba738e2db5cd02 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/a1dd92fca0d6b58b55ed0484f75d4205dbb77010 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/9368cdf90f52a68120d039887ccff74ff33b4444 [No types assigned]