Local privilege escalation via register validation
Published Apr 29, 2022 · Updated Aug 2, 2024
Out-of-bounds write in the Linux kernel netfilter subsystem allows local users to execute arbitrary code via crafted nftables rules. The nft_validate_register_store and nft_validate_register_load functions validate user-controlled register numbers without the required bounds checks, enabling reads and writes relative to kernel stack data. Exploitation requires an unprivileged user with user and network namespace access; successful exploitation can compromise kernel integrity and availability.
Summary
What happened
Out-of-bounds write in the Linux kernel netfilter subsystem allows local users to execute arbitrary code via crafted nftables rules. The nft_validate_register_store and nft_validate_register_load functions validate user-controlled register numbers without the required bounds checks, enabling reads and writes relative to kernel stack data. Exploitation requires an unprivileged user with user and network namespace access; successful exploitation can compromise kernel integrity and availability.
The record
- CVE
- CVE-2022-1015
- Published
- Apr 29, 2022
- Updated
- Aug 2, 2024
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-787, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 29, 2022CVE publishedPublication date reported by the CVE source.
- Aug 2, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=Kernel 5.16.18
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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