CVE-2022-1943Public exploit

Privilege escalation or crash via uninitialized UDF length

Published Jun 1, 2022 · Updated Aug 3, 2024

An out-of-bounds write in the Linux kernel UDF filesystem allows local users to crash the system or escalate privileges through file operations. udf_write_fi() trusts an uninitialized lengthOfImpUse field and uses the resulting attacker-controlled offset and length in a memcpy of a file identifier. Exploitation requires a crafted UDF image to be mounted and a file operation to reach the faulty copy; observed consequences include filesystem corruption and a kernel crash.

CVSS severity7.8
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds write in the Linux kernel UDF filesystem allows local users to crash the system or escalate privileges through file operations. udf_write_fi() trusts an uninitialized lengthOfImpUse field and uses the resulting attacker-controlled offset and length in a memcpy of a file identifier. Exploitation requires a crafted UDF image to be mounted and a file operation to reach the faulty copy; observed consequences include filesystem corruption and a kernel crash.

The record

CVE
CVE-2022-1943
Published
Jun 1, 2022
Updated
Aug 3, 2024
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-787, T1068, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 1, 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 5.18-rc7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=Linux kernel 5.18-rc7

Published CVSS scores

7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
7.0SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1068Exploitation for Privilege Escalation
T1499Endpoint Denial of Service

Public exploit references

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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