// For flags

CVE-2021-47305

dma-buf/sync_file: Don't leak fences on merge 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:

dma-buf/sync_file: Don't leak fences on merge failure

Each add_fence() call does a dma_fence_get() on the relevant fence. In
the error path, we weren't calling dma_fence_put() so all those fences
got leaked. Also, in the krealloc_array failure case, we weren't
freeing the fences array. Instead, ensure that i and fences are always
zero-initialized and dma_fence_put() all the fences and kfree(fences) on
every error path.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dma-buf/sync_file: no filtrar barreras en caso de falla de fusión. Cada llamada a add_fence() realiza un dma_fence_get() en la barrera relevante. En la ruta del error, no estábamos llamando a dma_fence_put() por lo que se filtraron todas esas barreras. Además, en el caso de falla de krealloc_array, no estábamos liberando la matriz de vallas. En su lugar, asegúrese de que i y las vallas estén siempre inicializadas en cero y dma_fence_put() todas las vallas y kfree(fences) en cada ruta de error.

*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
  • 2024-05-21 CVE Reserved
  • 2024-05-21 CVE Published
  • 2024-05-22 EPSS Updated
  • 2024-12-19 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"
>= 4.9 < 4.14.241
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 4.14.241"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.9 < 4.19.199
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 4.19.199"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.9 < 5.4.135
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 5.4.135"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.9 < 5.10.53
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 5.10.53"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.9 < 5.13.5
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 5.13.5"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 4.9 < 5.14
Search vendor "Linux" for product "Linux Kernel" and version " >= 4.9 < 5.14"
en
Affected