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CVE-2024-56532
Alsa us122l Soft Lockup Vulnerability
Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: us122l: Use snd_card_free_when_closed() at disconnection The USB disconnect callback is supposed to be short and not too-long waiting. OTOH, the current code uses snd_card_free() at disconnection, but this waits for the close of all used fds, hence it can take long. It eventually blocks the upper layer USB ioctls, which may trigger a soft lockup. An easy workaround is to replace snd_card_free() with snd_card_free_when_closed(). This variant returns immediately while the release of resources is done asynchronously by the card device release at the last close. The loop of us122l->mmap_count check is dropped as well. The check is useless for the asynchronous operation with *_when_closed().

INFO

Published Date :

Dec. 27, 2024, 2:15 p.m.

Last Modified :

Dec. 27, 2024, 2:15 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2024-56532 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
To address the soft lockup vulnerability, update the affected packages and kernel.
  • Update the affected packages.
  • Update the affected kernel package.
Public PoC/Exploit Available at Github

CVE-2024-56532 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

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-2024-56532.

URL Resource
https://git.kernel.org/stable/c/020cbc4d7414f0962004213e2b7bc5cc607e9ec7
https://git.kernel.org/stable/c/2938dd2648522336133c151dd67bb9bf01cbd390
https://git.kernel.org/stable/c/75f418b249d84021865eaa59515d3ed9b75ce4d6
https://git.kernel.org/stable/c/9a48bd2184b142c92a4e17eac074c61fcf975bc9
https://git.kernel.org/stable/c/9b27924dc8d7f8a8c35e521287d4ccb9a006e597
https://git.kernel.org/stable/c/9d5c530e4d70f64b1114f2cc29ac690ba7ac4a38
https://git.kernel.org/stable/c/b7df09bb348016943f56b09dcaafe221e3f73947
https://git.kernel.org/stable/c/bc778ad3e495333eebda36fe91d5b2c93109cc16
https://git.kernel.org/stable/c/bf0aa35a7cb8602cccf2387712114e836f65c154
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2024-56532 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-2024-56532 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).

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cku-heise/euvd-api-doc

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Updated: 3 months, 1 week ago
5 stars 1 fork 1 watcher
Born at : April 16, 2025, 1:43 p.m. This repo has been linked 280 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2024-56532 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2024-56532 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.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Dec. 27, 2024

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: ALSA: us122l: Use snd_card_free_when_closed() at disconnection The USB disconnect callback is supposed to be short and not too-long waiting. OTOH, the current code uses snd_card_free() at disconnection, but this waits for the close of all used fds, hence it can take long. It eventually blocks the upper layer USB ioctls, which may trigger a soft lockup. An easy workaround is to replace snd_card_free() with snd_card_free_when_closed(). This variant returns immediately while the release of resources is done asynchronously by the card device release at the last close. The loop of us122l->mmap_count check is dropped as well. The check is useless for the asynchronous operation with *_when_closed().
    Added Reference https://git.kernel.org/stable/c/020cbc4d7414f0962004213e2b7bc5cc607e9ec7
    Added Reference https://git.kernel.org/stable/c/2938dd2648522336133c151dd67bb9bf01cbd390
    Added Reference https://git.kernel.org/stable/c/75f418b249d84021865eaa59515d3ed9b75ce4d6
    Added Reference https://git.kernel.org/stable/c/9a48bd2184b142c92a4e17eac074c61fcf975bc9
    Added Reference https://git.kernel.org/stable/c/9b27924dc8d7f8a8c35e521287d4ccb9a006e597
    Added Reference https://git.kernel.org/stable/c/9d5c530e4d70f64b1114f2cc29ac690ba7ac4a38
    Added Reference https://git.kernel.org/stable/c/b7df09bb348016943f56b09dcaafe221e3f73947
    Added Reference https://git.kernel.org/stable/c/bc778ad3e495333eebda36fe91d5b2c93109cc16
    Added Reference https://git.kernel.org/stable/c/bf0aa35a7cb8602cccf2387712114e836f65c154
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
No CVSS metrics available for this vulnerability.