CVE-2023-53458

MEDIUM EPSS 4.7%
Published Oct 1, 20259mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Oct 1, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥3.18  –  <5.15.113
linuxlinux_kernel*≥5.16  –  <6.1.30
linuxlinux_kernel*≥6.2  –  <6.3.4

References 4

  • git.kernel.org https://git.kernel.org/stable/c/47e8b73bc35d7c54642f78e498697692f6358996
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5b8e5e28e85a546dfccc3895befe0e823fdd7c89
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6738841f6fcf23e9fc30e2449f32fc84ee19c6f1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f0a06203f2fe63f04311467200c99c4ee1926578
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/47e8b73bc35d7c54642f78e498697692f6358996
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5b8e5e28e85a546dfccc3895befe0e823fdd7c89
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6738841f6fcf23e9fc30e2449f32fc84ee19c6f1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f0a06203f2fe63f04311467200c99c4ee1926578
    Patch