(Pwn2Own) Linux Kernel nf_tables_newset Out-Of-Bounds Write Information Disclosure Vulnerability
Vulnerability Details
This vulnerability allows local attackers to disclose sensitive information 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 nft_objects. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilties to escalate privileges and execute arbitrary code in the context of root.
Additional Details
Linux has issued an update to correct this vulnerability. More details can be found at:
https://ubuntu.com/security/CVE-2022-2078#notes
Disclosure Timeline
- 2022-05-25 - Vulnerability reported to vendor
- 2026-03-16 - Coordinated public release of advisory
- 2026-03-16 - Advisory Updated
Credit
Team Orca of Sea Security (@seasecresponse), security.sea.com
