Advisory Details

August 28th, 2025

Linux Kernel perf Subsystem AUX Buffers Use-After-Free Local Privilege Escalation Vulnerability

ZDI-25-873
ZDI-CAN-27504

CVE ID
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 handling of reference counters. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b024d7b56c77191cde544f838debb7f8451cd0d6
DISCLOSURE TIMELINE
  • 2025-07-29 - Vulnerability reported to vendor
  • 2025-08-28 - Coordinated public release of advisory
  • 2025-08-28 - Advisory Updated
CREDIT Anonymous
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