CVE-2024-26775
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
03/04/2024
Last modified:
07/01/2025
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
aoe: avoid potential deadlock at set_capacity<br />
<br />
Move set_capacity() outside of the section procected by (&d->lock).<br />
To avoid possible interrupt unsafe locking scenario:<br />
<br />
CPU0 CPU1<br />
---- ----<br />
[1] lock(&bdev->bd_size_lock);<br />
local_irq_disable();<br />
[2] lock(&d->lock);<br />
[3] lock(&bdev->bd_size_lock);<br />
<br />
[4] lock(&d->lock);<br />
<br />
*** DEADLOCK ***<br />
<br />
Where [1](&bdev->bd_size_lock) hold by zram_add()->set_capacity().<br />
[2]lock(&d->lock) hold by aoeblk_gdalloc(). And aoeblk_gdalloc()<br />
is trying to acquire [3](&bdev->bd_size_lock) at set_capacity() call.<br />
In this situation an attempt to acquire [4]lock(&d->lock) from<br />
aoecmd_cfg_rsp() will lead to deadlock.<br />
<br />
So the simplest solution is breaking lock dependency<br />
[2](&d->lock) -> [3](&bdev->bd_size_lock) by moving set_capacity()<br />
outside.
Impact
Base Score 3.x
5.50
Severity 3.x
MEDIUM
Vulnerable products and versions
CPE | From | Up to |
---|---|---|
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.1.80 (excluding) | |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.2 (including) | 6.6.19 (excluding) |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.7 (including) | 6.7.7 (excluding) |
cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page
References to Advisories, Solutions, and Tools
- https://git.kernel.org/stable/c/19a77b27163820f793b4d022979ffdca8f659b77
- https://git.kernel.org/stable/c/2d623c94fbba3554f4446ba6f3c764994e8b0d26
- https://git.kernel.org/stable/c/673629018ba04906899dcb631beec34d871f709c
- https://git.kernel.org/stable/c/e169bd4fb2b36c4b2bee63c35c740c85daeb2e86
- https://git.kernel.org/stable/c/19a77b27163820f793b4d022979ffdca8f659b77
- https://git.kernel.org/stable/c/2d623c94fbba3554f4446ba6f3c764994e8b0d26
- https://git.kernel.org/stable/c/673629018ba04906899dcb631beec34d871f709c
- https://git.kernel.org/stable/c/e169bd4fb2b36c4b2bee63c35c740c85daeb2e86