Advisory Details

July 29th, 2024

(Pwn2Own) Linux Kernel io_uring Buffer List Race Condition Local Privilege Escalation Vulnerability

ZDI-24-1018
ZDI-CAN-23851

CVE ID CVE-2024-35880
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 io_uring buffer list. 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/2024051944-CVE-2024-35880-6ffb@gregkh/#r
DISCLOSURE TIMELINE
  • 2024-04-02 - Vulnerability reported to vendor
  • 2024-07-29 - Coordinated public release of advisory
  • 2024-08-15 - Advisory Updated
CREDIT Billy Jheng Bing-Jhong, Đỗ Minh Tuấn, Muhammad Alifa Ramdhan
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