// For flags

CVE-2021-47471

drm: mxsfb: Fix NULL pointer dereference crash on unload

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: drm: mxsfb: Fix NULL pointer dereference crash on unload The mxsfb->crtc.funcs may already be NULL when unloading the driver,
in which case calling mxsfb_irq_disable() via drm_irq_uninstall() from
mxsfb_unload() leads to NULL pointer dereference. Since all we care about is masking the IRQ and mxsfb->base is still
valid, just use that to clear and mask the IRQ.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: drm: mxsfb: corrige el fallo de desreferencia del puntero NULL al descargar Es posible que mxsfb->crtc.funcs ya sea NULL al descargar el controlador, en cuyo caso se llama a mxsfb_irq_disable() a través de drm_irq_uninstall() desde mxsfb_unload() conduce a la desreferencia del puntero NULL. Dado que lo único que nos importa es enmascarar la IRQ y mxsfb->base sigue siendo válido, simplemente utilícelo para borrar y enmascarar la IRQ.

In the Linux kernel, the following vulnerability has been resolved: drm: mxsfb: Fix NULL pointer dereference crash on unload The mxsfb->crtc.funcs may already be NULL when unloading the driver, in which case calling mxsfb_irq_disable() via drm_irq_uninstall() from mxsfb_unload() leads to NULL pointer dereference. Since all we care about is masking the IRQ and mxsfb->base is still valid, just use that to clear and mask the IRQ.

The SUSE Linux Enterprise 15 SP4 kernel was updated to receive various security bug fixes.

*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
  • 2024-05-22 CVE Reserved
  • 2024-05-22 CVE Published
  • 2025-05-04 CVE Updated
  • 2025-06-30 EPSS 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"
 >= 5.10 < 5.10.76
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10 < 5.10.76"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.10 < 5.14.15
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10 < 5.14.15"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.10 < 5.15
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10 < 5.15"
en
Affected