CVE-2024-56531
ALSA USB Soft Lockup Denial of Service
Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: caiaq: 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. This patch also splits the code to the disconnect and the free phases; the former is called immediately at the USB disconnect callback while the latter is called from the card destructor.
INFO
Published Date :
Dec. 27, 2024, 2:15 p.m.
Last Modified :
Dec. 27, 2024, 2:15 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
Exploitability Score :
Public PoC/Exploit Available at Github
CVE-2024-56531 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
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CVE-2024-56531.
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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The following list is the news that have been mention
CVE-2024-56531 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-56531 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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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: caiaq: 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. This patch also splits the code to the disconnect and the free phases; the former is called immediately at the USB disconnect callback while the latter is called from the card destructor. Added Reference https://git.kernel.org/stable/c/237f3faf0177bdde728fa3106d730d806436aa4d Added Reference https://git.kernel.org/stable/c/3993edf44d3df7b6e8c753eac6ac8783473fcbab Added Reference https://git.kernel.org/stable/c/4507a8b9b30344c5ddd8219945f446d47e966a6d Added Reference https://git.kernel.org/stable/c/4dd821dcbfcecf7af6a08370b0b217cde2818acf Added Reference https://git.kernel.org/stable/c/a3f9314752dbb6f6aa1f0f2b4c58243bda800738 Added Reference https://git.kernel.org/stable/c/b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c Added Reference https://git.kernel.org/stable/c/cadf1d8e9ddcd74584ec961aeac14ac549b261d8 Added Reference https://git.kernel.org/stable/c/dd0de8cb708951cebf727aa045e8242ba651bb52 Added Reference https://git.kernel.org/stable/c/ebad462eec93b0f701dfe4de98990e7355283801
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-56531 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-2024-56531
weaknesses.