Linux Kernel GSM Multiplexing Race Condition Local Privilege Escalation Vulnerability

November 13th, 2026
ZDI-26-1000 ZDI-CAN-25086

CVE ID

CVE-2024-50073

CVSS Score

7.5 AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected Vendors

Linux

Affected Products

Kernel

Vulnerability Details

This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel. An attacker must first obtain the ability to execute high-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the n_gsm driver. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the kernel.

Additional Details

Linux has issued an update to correct this vulnerability. More details can be found at:
https://github.com/torvalds/linux/commit/9462f4ca56e7d2430fdb6dcc8498244acbfc4489

Disclosure Timeline

  • 2024-09-03 - Vulnerability reported to vendor
  • 2026-11-13 - Coordinated public release of advisory
  • 2026-11-13 - Advisory Updated

Credit

dangdang777

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