CVE-2022-3202

Crash or kernel-data disclosure via unchecked JFS map

Published Sep 14, 2022 · Updated Aug 3, 2024

NULL pointer dereference in Linux Kernel JFS before 5.18-rc1 allows local users to crash the system or disclose kernel data. When JFS mounting fails before the fileset inode allocation map is initialized, jfs_evict_inode checks ipimap but not its i_imap member and passes the inode to diFree, which dereferences that null member. Reachability requires local low-privileged access and a JFS mount failure; the bounded effects are a kernel crash or exposure of kernel-internal information.

CVSS severity7.1
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux Kernel JFS before 5.18-rc1 allows local users to crash the system or disclose kernel data. When JFS mounting fails before the fileset inode allocation map is initialized, jfs_evict_inode checks ipimap but not its i_imap member and passes the inode to diFree, which dereferences that null member. Reachability requires local low-privileged access and a JFS mount failure; the bounded effects are a kernel crash or exposure of kernel-internal information.

The record

CVE
CVE-2022-3202
Published
Sep 14, 2022
Updated
Aug 3, 2024
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 14, 2022CVE publishedPublication date reported by the CVE source.
  2. 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?

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

  1. Affected versionversion=Linux Kernel version prior to kernel 5.18 rc1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=Linux Kernel version prior to kernel 5.18 rc1

Published CVSS scores

6.3SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
7.1NIST NVDCVSS: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-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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