PT-2025-40165 · Cx23885+3 · Cx23885+3

Published 2023-03-02 · Updated 2026-03-14 · CVE-2023-53458

Positive Technologies (AI Summary)

CVSS v2.0

6.0

Medium

Base vector

AV:L/AC:H/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A null pointer dereference issue exists in the cx23885 driver within the Linux kernel, specifically in the buffer prepare() and buffer finish() functions. The issue occurs when dma alloc coherent fails during buffer preparation within the cx23885 risc buffer() function, leading to an empty buffer. Subsequently, accessing or freeing this empty buffer triggers a null pointer dereference. The issue can potentially be triggered dynamically from user space. The risc->cpu value is checked before buffer freeing to address this.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Unchecked Return Value

NULL Pointer Dereference

Weakness Enumeration

CWE-252

CWE-476

Related Identifiers

BDU:2026-03355

CVE-2023-53458

SUSE-SU-2025:03615-1

SUSE-SU-2025:03628-1

SUSE-SU-2025:3716-1

SUSE-SU-2025:3761-1

Affected Products

Debian

Linux Kernel

Suse

Cx23885

References · 864

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53458.json · Exploit
• https://git.kernel.org/stable/c/47e8b73bc35d7c54642f78e498697692f6358996 · Patch
• https://git.kernel.org/stable/c/5b8e5e28e85a546dfccc3895befe0e823fdd7c89 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2023-53458 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53458 · Security Note
• https://ubuntu.com/security/CVE-2023-53458 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2023-53458 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:3761-1 · Vendor Advisory
• https://git.kernel.org/stable/c/6738841f6fcf23e9fc30e2449f32fc84ee19c6f1 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:03628-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:3716-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:03615-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-53458 · Security Note
• https://osv.dev/vulnerability/CVE-2023-53458 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-53458 · Vendor Advisory