// For flags

CVE-2021-47164

net/mlx5e: Fix null deref accessing lag dev

Severity Score

5.5
*CVSS v3.1

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:

net/mlx5e: Fix null deref accessing lag dev

It could be the lag dev is null so stop processing the event.
In bond_enslave() the active/backup slave being set before setting the
upper dev so first event is without an upper dev.
After setting the upper dev with bond_master_upper_dev_link() there is
a second event and in that event we have an upper dev.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: net/mlx5e: corrigió el deref nulo al acceder a lag dev. Podría ser que el lag dev sea nulo, así que deje de procesar el evento. En bond_enslave(), el esclavo activo/de respaldo se configura antes de configurar el desarrollo superior, por lo que el primer evento es sin un desarrollo superior. Después de configurar el desarrollo superior con bond_master_upper_dev_link() hay un segundo evento y en ese evento tenemos un desarrollo superior.

*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
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-03-25 CVE Reserved
  • 2024-03-25 CVE Published
  • 2024-05-24 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-476: NULL Pointer Dereference
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"
 >= 5.8 < 5.10.42
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.8 < 5.10.42"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.8 < 5.12.9
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.8 < 5.12.9"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.8 < 5.13
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.8 < 5.13"
en
Affected