CVE-2026-61897 | BDVDB-2026-363039 Detail

Canonicalaccountsservice

Description#

An Ubuntu-specific patch to AccountsService before 23.13.9-8ubuntu7 only partially drops privileges before launching language helper scripts. It changes the effective UID/GID to the target user but leaves the real UID as 0 (root). A shell spawned by a helper script inherits ruid=0 and may reset its effective UID to root, enabling local privilege escalation.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: local.

Weaknesses#

CWE-273 Improper Check for Dropped Privileges

References#

Exploit#

No public exploit known

History#

Version 12026-08-20Record published in the CVE List.
Version 22026-08-26Most recent update recorded in the CVE List.

Published

Published: 2026-08-20
Last modified: 2026-08-26

Vendor information

Vendor: Canonical
Product: accountsservice

All Canonical vulnerabilities

Score

7.8 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 3.4.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 22.07.5-2ubuntu1 and < 22.07.5-2ubuntu1.6
Fixed
22.07.5-2ubuntu1.6
Vulnerable
>= 23.13.9-2ubuntu6 and < 23.13.9-2ubuntu6.1
Fixed
23.13.9-2ubuntu6.1
Vulnerable
>= 23.13.9-8ubuntu5 and < 23.13.9-8ubuntu5.2
Fixed
23.13.9-8ubuntu5.2
Vulnerable
>= 23.13.9-8ubuntu6 and < 23.13.9-8ubuntu7
Fixed
23.13.9-8ubuntu7

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.8 High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Metric breakdown
Attack Vector	Local
Attack Complexity	Low
Privileges Required	Low
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).