CVE-2023-3297Public exploit

Service crash via D-Bus double reply

Published Sep 1, 2023 · Updated Sep 30, 2024

Use-after-free in Ubuntu AccountsService allows local users to crash accounts-daemon by sending a crafted system D-Bus message. Error paths in user.c call throw_error and then send a normal method return, causing both paths to decrement the same GDBusMethodInvocation reference and reuse the freed context. An unprivileged local account can trigger the demonstrated SIGSEGV; Canonical also assesses arbitrary code execution, but public research does not demonstrate that consequence.

CVSS severity8.1
High
EPSS probability0.33%
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

Use-after-free in Ubuntu AccountsService allows local users to crash accounts-daemon by sending a crafted system D-Bus message. Error paths in user.c call throw_error and then send a normal method return, causing both paths to decrement the same GDBusMethodInvocation reference and reuse the freed context. An unprivileged local account can trigger the demonstrated SIGSEGV; Canonical also assesses arbitrary code execution, but public research does not demonstrate that consequence.

The record

CVE
CVE-2023-3297
Published
Sep 1, 2023
Updated
Sep 30, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1068
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 30, 2024Record 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.1Canonical Ltd.CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

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