CVE-2022-50167

Local privilege escalation via BPF pointer overflow

Published Jun 18, 2025 · Updated Aug 5, 2026

Integer overflow in Linux kernel BPF ARRAY maps allows local users to corrupt kernel memory through a map larger than 4 GB. Pointer calculations in kernel/bpf/arraymap.c multiply 32-bit index and element-size values without first widening them, producing a wrapped element address. Unprivileged BPF exposes the basic path, while the CAP_BPF timer path can yield arbitrary kernel reads or writes, control-flow hijacking, or a panic.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Linux kernel BPF ARRAY maps allows local users to corrupt kernel memory through a map larger than 4 GB. Pointer calculations in kernel/bpf/arraymap.c multiply 32-bit index and element-size values without first widening them, producing a wrapped element address. Unprivileged BPF exposes the basic path, while the CAP_BPF timer path can yield arbitrary kernel reads or writes, control-flow hijacking, or a panic.

The record

CVE
CVE-2022-50167
Published
Jun 18, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.3
  2. Affected versionversion=c85d69135a9175c50a823d04d62d932312d037b3 <063e092534d4c6785228e5b1eb6e9329f66ccbe4
  3. Affected versionversion=c85d69135a9175c50a823d04d62d932312d037b3 <3c7256b880b3a5aa1895fd169a34aa4224a11862
  4. Affected versionversion=c85d69135a9175c50a823d04d62d932312d037b3 <87ac0d600943994444e24382a87aa19acc4cd3d4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.3; version=c85d69135a9175c50a823d04d62d932312d037b3 <063e092534d4c6785228e5b1eb6e9329f66ccbe4; version=c85d69135a9175c50a823d04d62d932312d037b3 <3c7256b880b3a5aa1895fd169a34aa4224a11862; version=c85d69135a9175c50a823d04d62d932312d037b3 <87ac0d600943994444e24382a87aa19acc4cd3d4

Published CVSS scores

5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.4Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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