In the Linux kernel, the following vulnerability has been resolved:
media: cx23885: Fix a null-ptr-deref bug in buffer_prepare() and buffer_finish()
When the driver calls cx23885_risc_buffer() to prepare the buffer, the
function call dma_alloc_coherent may fail, resulting in a empty buffer
risc->cpu. Later when we free the buffer or access the buffer, null ptr
deref is triggered.
This bug is similar to the following one:
https://git.linuxtv.org/media_stage.git/commit/?id=2b064d91440b33fba5b452f2d1b31f13ae911d71.
We believe the bug can be also dynamically triggered from user side.
Similarly, we fix this by checking the return value of cx23885_risc_buffer()
and the value of risc->cpu before buffer free.
References
Configurations
Configuration 1 (hide)
|
History
16 Jan 2026, 20:58
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/47e8b73bc35d7c54642f78e498697692f6358996 - Patch | |
| References | () https://git.kernel.org/stable/c/5b8e5e28e85a546dfccc3895befe0e823fdd7c89 - Patch | |
| References | () https://git.kernel.org/stable/c/6738841f6fcf23e9fc30e2449f32fc84ee19c6f1 - Patch | |
| References | () https://git.kernel.org/stable/c/f0a06203f2fe63f04311467200c99c4ee1926578 - Patch | |
| CWE | CWE-476 | |
| First Time |
Linux
Linux linux Kernel |
|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
01 Oct 2025, 12:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-10-01 12:15
Updated : 2026-01-16 20:58
NVD link : CVE-2023-53458
Mitre link : CVE-2023-53458
CVE.ORG link : CVE-2023-53458
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference