Kernel crash via unchecked nftables field count
Published Jun 30, 2022 · Updated Aug 3, 2024
Stack-based buffer overflow in Linux Kernel before 5.19 allows local users to crash the system through crafted nftables set attributes. nft_set_desc_concat_parse() increments field_count for every nested netlink attribute and writes each length into a fixed-size field_len array without first checking its bound. Exploitation requires low-privileged local access and the ability to create a network namespace; the confirmed consequence is a kernel crash.
Summary
What happened
Stack-based buffer overflow in Linux Kernel before 5.19 allows local users to crash the system through crafted nftables set attributes. nft_set_desc_concat_parse() increments field_count for every nested netlink attribute and writes each length into a fixed-size field_len array without first checking its bound. Exploitation requires low-privileged local access and the ability to create a network namespace; the confirmed consequence is a kernel crash.
The record
- CVE
- CVE-2022-2078
- Published
- Jun 30, 2022
- Updated
- Aug 3, 2024
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-121, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 30, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 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 5.19 rc1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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