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CVE-2022-2959: ZDI-22-1165

A race condition was found in the Linux kernel’s watch queue due to a missing lock in pipe_resize_ring(). The specific flaw exists within the handling of pipe buffers. The issue results from the lack of proper locking when performing operations on an object. This flaw allows a local user to crash the system or escalate their privileges on the system.

CVE
#vulnerability#linux

August 24th, 2022

Linux Kernel Watch Queue Race Condition Privilege Escalation Vulnerability****ZDI-22-1165
ZDI-CAN-17291

CVE ID

CVE-2022-2959

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 pipe buffers. 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://access.redhat.com/security/cve/CVE-2022-2959

DISCLOSURE TIMELINE

  • 2022-05-25 - Vulnerability reported to vendor
  • 2022-08-24 - Coordinated public release of advisory

CREDIT

Selim Enes Karaduman @Enesdex

BACK TO ADVISORIES

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