0.0
NA
CVE-2024-57946
Vulnerability Title: "Virtio-Blk Linux Kernel Deadlock Vulnerability" (Virtio-Blk, Deadlock)
Description

In the Linux kernel, the following vulnerability has been resolved: virtio-blk: don't keep queue frozen during system suspend Commit 4ce6e2db00de ("virtio-blk: Ensure no requests in virtqueues before deleting vqs.") replaces queue quiesce with queue freeze in virtio-blk's PM callbacks. And the motivation is to drain inflight IOs before suspending. block layer's queue freeze looks very handy, but it is also easy to cause deadlock, such as, any attempt to call into bio_queue_enter() may run into deadlock if the queue is frozen in current context. There are all kinds of ->suspend() called in suspend context, so keeping queue frozen in the whole suspend context isn't one good idea. And Marek reported lockdep warning[1] caused by virtio-blk's freeze queue in virtblk_freeze(). [1] https://lore.kernel.org/linux-block/[email protected]/ Given the motivation is to drain in-flight IOs, it can be done by calling freeze & unfreeze, meantime restore to previous behavior by keeping queue quiesced during suspend.

INFO

Published Date :

Jan. 21, 2025, 1:15 p.m.

Last Modified :

Jan. 21, 2025, 1:15 p.m.

Source :

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

Remotely Exploitable :

No

Impact Score :

Exploitability Score :

Affected Products

The following products are affected by CVE-2024-57946 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
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-2024-57946.

URL Resource
https://git.kernel.org/stable/c/12c0ddd6c551c1e438b087f874b4f1223a75f7ea
https://git.kernel.org/stable/c/6dea8e3de59928974bf157dd0499d3958d744ae4
https://git.kernel.org/stable/c/7678abee0867e6b7fb89aa40f6e9f575f755fb37
https://git.kernel.org/stable/c/92d5139b91147ab372a17daf5dc27a5b9278e516
https://git.kernel.org/stable/c/9ca428c6397abaa8c38f5c69133a2299e1efbbf2
https://git.kernel.org/stable/c/9e323f856cf4963120e0e3892a84ef8bd764a0e4
https://git.kernel.org/stable/c/d738f3215bb4f88911ff4579780a44960c8e0ca5

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-2024-57946 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2024-57946 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

    Jan. 21, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: virtio-blk: don't keep queue frozen during system suspend Commit 4ce6e2db00de ("virtio-blk: Ensure no requests in virtqueues before deleting vqs.") replaces queue quiesce with queue freeze in virtio-blk's PM callbacks. And the motivation is to drain inflight IOs before suspending. block layer's queue freeze looks very handy, but it is also easy to cause deadlock, such as, any attempt to call into bio_queue_enter() may run into deadlock if the queue is frozen in current context. There are all kinds of ->suspend() called in suspend context, so keeping queue frozen in the whole suspend context isn't one good idea. And Marek reported lockdep warning[1] caused by virtio-blk's freeze queue in virtblk_freeze(). [1] https://lore.kernel.org/linux-block/[email protected]/ Given the motivation is to drain in-flight IOs, it can be done by calling freeze & unfreeze, meantime restore to previous behavior by keeping queue quiesced during suspend.
    Added Reference https://git.kernel.org/stable/c/12c0ddd6c551c1e438b087f874b4f1223a75f7ea
    Added Reference https://git.kernel.org/stable/c/6dea8e3de59928974bf157dd0499d3958d744ae4
    Added Reference https://git.kernel.org/stable/c/7678abee0867e6b7fb89aa40f6e9f575f755fb37
    Added Reference https://git.kernel.org/stable/c/92d5139b91147ab372a17daf5dc27a5b9278e516
    Added Reference https://git.kernel.org/stable/c/9ca428c6397abaa8c38f5c69133a2299e1efbbf2
    Added Reference https://git.kernel.org/stable/c/9e323f856cf4963120e0e3892a84ef8bd764a0e4
    Added Reference https://git.kernel.org/stable/c/d738f3215bb4f88911ff4579780a44960c8e0ca5
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.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2024-57946 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-2024-57946 weaknesses.

NONE - Vulnerability Scoring System
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