// For flags

CVE-2024-26912

drm/nouveau: fix several DMA buffer leaks

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/nouveau: fix several DMA buffer leaks

Nouveau manages GSP-RM DMA buffers with nvkm_gsp_mem objects. Several of
these buffers are never dealloced. Some of them can be deallocated
right after GSP-RM is initialized, but the rest need to stay until the
driver unloads.

Also futher bullet-proof these objects by poisoning the buffer and
clearing the nvkm_gsp_mem object when it is deallocated. Poisoning
the buffer should trigger an error (or crash) from GSP-RM if it tries
to access the buffer after we've deallocated it, because we were wrong
about when it is safe to deallocate.

Finally, change the mem->size field to a size_t because that's the same
type that dma_alloc_coherent expects.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/nouveau: corrige varias fugas del búfer DMA Nouveau administra los buffers DMA GSP-RM con objetos nvkm_gsp_mem. Varios de estos búferes nunca se desasignan. Algunos de ellos se pueden desasignar inmediatamente después de que se inicializa GSP-RM, pero el resto debe permanecer hasta que se descargue el controlador. También proteja aún más estos objetos envenenando el búfer y limpiando el objeto nvkm_gsp_mem cuando se desasigna. El envenenamiento del búfer debería provocar un error (o bloqueo) de GSP-RM si intenta acceder al búfer después de haberlo desasignado, porque nos equivocamos acerca de cuándo es seguro desasignarlo. Finalmente, cambie el campo mem->size a size_t porque es el mismo tipo que espera dma_alloc_coherent.

*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
  • 2024-02-19 CVE Reserved
  • 2024-04-17 CVE Published
  • 2024-04-18 EPSS Updated
  • 2024-12-19 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-401: Missing Release of Memory after Effective Lifetime
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"
 >= 6.7 < 6.7.6
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.7 < 6.7.6"
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