// For flags

CVE-2024-26775

aoe: avoid potential deadlock at set_capacity

Severity Score

5.5
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

In the Linux kernel, the following vulnerability has been resolved: aoe: avoid potential deadlock at set_capacity Move set_capacity() outside of the section procected by (&d->lock).
To avoid possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ----
[1] lock(&bdev->bd_size_lock); local_irq_disable(); [2] lock(&d->lock); [3] lock(&bdev->bd_size_lock); <Interrupt>
[4] lock(&d->lock); *** DEADLOCK *** Where [1](&bdev->bd_size_lock) hold by zram_add()->set_capacity().
[2]lock(&d->lock) hold by aoeblk_gdalloc(). And aoeblk_gdalloc()
is trying to acquire [3](&bdev->bd_size_lock) at set_capacity() call.
In this situation an attempt to acquire [4]lock(&d->lock) from
aoecmd_cfg_rsp() will lead to deadlock. So the simplest solution is breaking lock dependency
[2](&d->lock) -> [3](&bdev->bd_size_lock) by moving set_capacity()
outside.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: aoe: evita un posible punto muerto en set_capacity Mueve set_capacity() fuera de la sección procesada por (&amp;d-&gt;lock). Para evitar una posible interrupción en un escenario de bloqueo inseguro: CPU0 CPU1 ---- ---- [1] lock(&amp;bdev-&gt;bd_size_lock); local_irq_disable(); [2] bloquear(&amp;d-&gt;bloquear); [3] bloquear(&amp;bdev-&gt;bd_size_lock); [4] bloqueo(&amp;d-&gt;bloqueo); *** DEADLOCK *** Donde [1](&amp;bdev-&gt;bd_size_lock) mantenido por zram_add()-&gt;set_capacity(). [2]bloqueo(&amp;d-&gt;bloqueo) retenido por aoeblk_gdalloc(). Y aoeblk_gdalloc() está intentando adquirir [3](&amp;bdev-&gt;bd_size_lock) en la llamada set_capacity(). En esta situación, un intento de adquirir [4]lock(&amp;d-&gt;lock) de aoecmd_cfg_rsp() provocará un punto muerto. Entonces, la solución más simple es romper la dependencia del bloqueo [2](&amp;d-&gt;lock) -&gt; [3](&amp;bdev-&gt;bd_size_lock) moviendo set_capacity() afuera.

In the Linux kernel, the following vulnerability has been resolved: aoe: avoid potential deadlock at set_capacity Move set_capacity() outside of the section procected by (&d->lock). To avoid possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- [1] lock(&bdev->bd_size_lock); local_irq_disable(); [2] lock(&d->lock); [3] lock(&bdev->bd_size_lock); <Interrupt> [4] lock(&d->lock); *** DEADLOCK *** Where [1](&bdev->bd_size_lock) hold by zram_add()->set_capacity(). [2]lock(&d->lock) hold by aoeblk_gdalloc(). And aoeblk_gdalloc() is trying to acquire [3](&bdev->bd_size_lock) at set_capacity() call. In this situation an attempt to acquire [4]lock(&d->lock) from aoecmd_cfg_rsp() will lead to deadlock. So the simplest solution is breaking lock dependency [2](&d->lock) -> [3](&bdev->bd_size_lock) by moving set_capacity() outside.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
Single
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-02-19 CVE Reserved
  • 2024-04-03 CVE Published
  • 2024-12-19 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
< 6.1.80
Search vendor "Linux" for product "Linux Kernel" and version " < 6.1.80"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
< 6.6.19
Search vendor "Linux" for product "Linux Kernel" and version " < 6.6.19"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
< 6.7.7
Search vendor "Linux" for product "Linux Kernel" and version " < 6.7.7"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
< 6.8
Search vendor "Linux" for product "Linux Kernel" and version " < 6.8"
en
Affected