CVE-2022-49289

Kernel-memory read and write via access_ok overflow

Published Feb 26, 2025 · Updated Aug 5, 2026

Integer overflow in Linux access_ok on csky, hexagon, and microblaze allows local users to bypass user-address validation via syscalls. The architecture-specific checks accept an address and size when their sum wraps below the address limit, so kernel copy paths treat kernel addresses as user space. Unprivileged local syscall access is required; successful abuse enables kernel-memory reads or writes and can crash the host.

CVSS severity7.1
High
EPSS probability0.27%
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

Integer overflow in Linux access_ok on csky, hexagon, and microblaze allows local users to bypass user-address validation via syscalls. The architecture-specific checks accept an address and size when their sum wraps below the address limit, so kernel copy paths treat kernel addresses as user space. Unprivileged local syscall access is required; successful abuse enables kernel-memory reads or writes and can crash the host.

The record

CVE
CVE-2022-49289
Published
Feb 26, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-190, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 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=3.2
  2. Affected versionversion=7567746e1c0d66ac0ef8a9d8816ca694462c7370 <222ca305c9fd39e5ed8104da25c09b2b79a516a8
  3. Affected versionversion=7567746e1c0d66ac0ef8a9d8816ca694462c7370 <99801e2f457824955da4aadaa035913a6dede03a
  4. Affected versionversion=7567746e1c0d66ac0ef8a9d8816ca694462c7370 <a1ad747fc1a0e06d1bf26b996ee8a56b5c8d02d8
  5. Affected versionversion=7567746e1c0d66ac0ef8a9d8816ca694462c7370 <e65d28d4e9bf90a35ba79c06661a572a38391dec

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.2; version=7567746e1c0d66ac0ef8a9d8816ca694462c7370 <222ca305c9fd39e5ed8104da25c09b2b79a516a8; version=7567746e1c0d66ac0ef8a9d8816ca694462c7370 <99801e2f457824955da4aadaa035913a6dede03a; version=7567746e1c0d66ac0ef8a9d8816ca694462c7370 <a1ad747fc1a0e06d1bf26b996ee8a56b5c8d02d8; version=7567746e1c0d66ac0ef8a9d8816ca694462c7370 <e65d28d4e9bf90a35ba79c06661a572a38391dec

Published CVSS scores

5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.1NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
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

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