Privileged kernel memory disclosure via BPF pointer constants
Published Sep 23, 2022 · Updated Apr 21, 2025
Out-of-bounds read in Linux Kernel BPF before commits af2ac3e13e45 and b1d18a7574d0 allows local users with CAP_BPF to read kernel memory. The bpf_sys_bpf path accepts constant-provided structure pointers without verifying that they reference BPF-owned memory, so crafted pointers reach arbitrary addresses. CAP_BPF or equivalent privileged access is required, and the demonstrated impact is confidentiality loss through disclosure of kernel memory.
Summary
What happened
Out-of-bounds read in Linux Kernel BPF before commits af2ac3e13e45 and b1d18a7574d0 allows local users with CAP_BPF to read kernel memory. The bpf_sys_bpf path accepts constant-provided structure pointers without verifying that they reference BPF-owned memory, so crafted pointers reach arbitrary addresses. CAP_BPF or equivalent privileged access is required, and the demonstrated impact is confidentiality loss through disclosure of kernel memory.
The record
- CVE
- CVE-2022-2785
- Published
- Sep 23, 2022
- Updated
- Apr 21, 2025
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-125, T1005
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Sep 23, 2022CVE publishedPublication date reported by the CVE source.
- Apr 21, 2025Record 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=5.14 <af2ac3e13e45
- Affected versionversion=5.18 <b1d18a7574d0
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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