CVE-2022-49658

Kernel-pointer disclosure via inconsistent BPF verifier bounds

Published Feb 26, 2025 · Updated May 11, 2026

Information disclosure in the Linux kernel allows local users to read kernel pointers through a crafted BPF program. The BPF verifier fails to synchronize a constant tnum with its minimum and maximum bounds after adjust_scalar_min_max_vals, allowing adjust_ptr_min_max_vals to treat a pointer as an unknown scalar. Low-privileged local access and the ability to submit the crafted BPF program are required; the demonstrated consequence is disclosure of kernel addresses.

CVSS severity5.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in the Linux kernel allows local users to read kernel pointers through a crafted BPF program. The BPF verifier fails to synchronize a constant tnum with its minimum and maximum bounds after adjust_scalar_min_max_vals, allowing adjust_ptr_min_max_vals to treat a pointer as an unknown scalar. Low-privileged local access and the ability to submit the crafted BPF program are required; the demonstrated consequence is disclosure of kernel addresses.

The record

CVE
CVE-2022-49658
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=4.14
  2. Affected versionversion=b03c9f9fdc37dab81ea04d5dacdc5995d4c224c2 <3844d153a41adea718202c10ae91dc96b37453b5
  3. Affected versionversion=b03c9f9fdc37dab81ea04d5dacdc5995d4c224c2 <a7de8d436db92bab8b1f44624297c2554a6ac36b
  4. Affected versionversion=b03c9f9fdc37dab81ea04d5dacdc5995d4c224c2 <b2a28bb36664c94375926cbbb91976242847699d
  5. Affected versionversion=b03c9f9fdc37dab81ea04d5dacdc5995d4c224c2 <e917be1f83ea14a68b3cf64d3da9968eaf991dae

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.14; version=b03c9f9fdc37dab81ea04d5dacdc5995d4c224c2 <3844d153a41adea718202c10ae91dc96b37453b5; version=b03c9f9fdc37dab81ea04d5dacdc5995d4c224c2 <a7de8d436db92bab8b1f44624297c2554a6ac36b; version=b03c9f9fdc37dab81ea04d5dacdc5995d4c224c2 <b2a28bb36664c94375926cbbb91976242847699d; version=b03c9f9fdc37dab81ea04d5dacdc5995d4c224c2 <e917be1f83ea14a68b3cf64d3da9968eaf991dae

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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

No sourced classifications are available.

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo