// For flags

CVE-2024-26858

net/mlx5e: Use a memory barrier to enforce PTP WQ xmit submission tracking occurs after populating the metadata_map

Severity Score

4.1
*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: Use a memory barrier to enforce PTP WQ xmit submission tracking occurs after populating the metadata_map

Just simply reordering the functions mlx5e_ptp_metadata_map_put and
mlx5e_ptpsq_track_metadata in the mlx5e_txwqe_complete context is not good
enough since both the compiler and CPU are free to reorder these two
functions. If reordering does occur, the issue that was supposedly fixed by
7e3f3ba97e6c ("net/mlx5e: Track xmit submission to PTP WQ after populating
metadata map") will be seen. This will lead to NULL pointer dereferences in
mlx5e_ptpsq_mark_ts_cqes_undelivered in the NAPI polling context due to the
tracking list being populated before the metadata map.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/mlx5e: use una barrera de memoria para aplicar PTP WQ. El seguimiento de envío xmit ocurre después de completar metadata_map. Simplemente reordenar las funciones mlx5e_ptp_metadata_map_put y mlx5e_ptpsq_track_metadata en el contexto mlx5e_txwqe_complete no es lo suficientemente bueno ya que ambas el compilador y la CPU son libres de reordenar estas dos funciones. Si se produce un reordenamiento, se verá el problema que supuestamente fue solucionado por 7e3f3ba97e6c ("net/mlx5e: Seguimiento del envío de xmit a PTP WQ después de completar el mapa de metadatos"). Esto dará lugar a desreferencias de puntero NULL en mlx5e_ptpsq_mark_ts_cqes_undelivered en el contexto de sondeo NAPI debido a que la lista de seguimiento se completa antes del mapa de metadatos.

A vulnerability was found in the mlx5e_txwqe_complete() function in the Linux kernel. The CPU or compiler may reorder two of the functions: mlx5e_ptp_metadata_map_put() and mlx5e_ptpsq_track_metadata(), and a situation could arise where metadata tracking occurs before the metadata map is fully populated. This could lead to a NULL pointer dereference which can cause crashes.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
High
Privileges Required
High
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
  • 2024-02-19 CVE Reserved
  • 2024-04-17 CVE Published
  • 2024-04-18 EPSS Updated
  • 2024-08-02 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"
>= 6.6.3 < 6.6.22
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.6.3 < 6.6.22"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 6.7 < 6.7.10
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.7 < 6.7.10"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 6.7 < 6.8
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.7 < 6.8"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
6.5.13
Search vendor "Linux" for product "Linux Kernel" and version "6.5.13"
en
Affected