CVE-2022-31212Public exploitNetwork attack vector

Service crash via shell-quote index over-read

Published Jul 17, 2022 · Updated Aug 3, 2024

Stack-based buffer over-read in dbus-broker before 31 allows attackers to crash the launcher via a malicious D-Bus service Exec line. c_shquote_strnspn() and c_shquote_strncspn() allocate 255-element lookup arrays, then index them with an unsigned input byte that can equal 255. Reachability requires control of an activation service Exec value; the demonstrated consequence is an out-of-bounds read and process abort.

CVSS severity7.5
High
EPSS probability2.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer over-read in dbus-broker before 31 allows attackers to crash the launcher via a malicious D-Bus service Exec line. c_shquote_strnspn() and c_shquote_strncspn() allocate 255-element lookup arrays, then index them with an unsigned input byte that can equal 255. Reachability requires control of an activation service Exec value; the demonstrated consequence is an out-of-bounds read and process abort.

The record

CVE
CVE-2022-31212
Published
Jul 17, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 17, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4SUSECVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

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No observations available

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

Weakness, pattern, technique

CWE-125Out-of-bounds Read
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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