Advisory Details

September 5th, 2024

Linux Kernel Plan 9 File System Race Condition Local Privilege Escalation Vulnerability

ZDI-24-1194
ZDI-CAN-24058

CVE ID CVE-2024-39463
CVSS SCORE 7.8, AV:L/AC:H/PR:L/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 low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the handling of the p9_fid object. 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 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://lore.kernel.org/linux-cve-announce/2024062513-CVE-2024-39463-42c8@gregkh/T/
DISCLOSURE TIMELINE
  • 2024-05-19 - Vulnerability reported to vendor
  • 2024-09-05 - Coordinated public release of advisory
  • 2024-09-05 - Advisory Updated
CREDIT Meysam Firouzi @R00tkitSMM and Amirmohammad Eftekhar @zer0legday
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