// For flags

CVE-2024-26943

nouveau/dmem: handle kcalloc() allocation failure

Severity Score

"-"
*CVSS v-

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:

nouveau/dmem: handle kcalloc() allocation failure

The kcalloc() in nouveau_dmem_evict_chunk() will return null if
the physical memory has run out. As a result, if we dereference
src_pfns, dst_pfns or dma_addrs, the null pointer dereference bugs
will happen.

Moreover, the GPU is going away. If the kcalloc() fails, we could not
evict all pages mapping a chunk. So this patch adds a __GFP_NOFAIL
flag in kcalloc().

Finally, as there is no need to have physically contiguous memory,
this patch switches kcalloc() to kvcalloc() in order to avoid
failing allocations.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nouveau/dmem: maneja el error de asignación de kcalloc() El kcalloc() en nouveau_dmem_evict_chunk() devolverá nulo si la memoria física se ha agotado. Como resultado, si eliminamos la referencia a src_pfns, dst_pfns o dma_addrs, se producirán errores de desreferenciación del puntero nulo. Además, la GPU está desapareciendo. Si kcalloc() falla, no podremos desalojar todas las páginas que asignan un fragmento. Entonces este parche agrega un indicador __GFP_NOFAIL en kcalloc(). Finalmente, como no es necesario tener memoria físicamente contigua, este parche cambia kcalloc() a kvcalloc() para evitar asignaciones fallidas.

*Credits: N/A
CVSS Scores
Attack Vector
-
Attack Complexity
-
Privileges Required
-
User Interaction
-
Scope
-
Confidentiality
-
Integrity
-
Availability
-
* 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
  • 2024-05-01 CVE Published
  • 2024-05-01 EPSS Updated
  • 2024-08-02 CVE 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 < 6.1.84
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.1 < 6.1.84"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 6.1 < 6.6.24
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.1 < 6.6.24"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 6.1 < 6.7.12
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.1 < 6.7.12"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 6.1 < 6.8.3
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.1 < 6.8.3"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 6.1 < 6.9
Search vendor "Linux" for product "Linux Kernel" and version " >= 6.1 < 6.9"
en
Affected