CVE-2026-61897

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/2157985
https://ubuntu.com/security/CVE-2026-61897

Configurations

No configuration.

History

18 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) Un parche específico de Ubuntu para AccountsService anterior a 23.13.9-8ubuntu7 solo reduce parcialmente los privilegios antes de lanzar los scripts auxiliares de idioma. Cambia el UID/GID efectivo al usuario objetivo, pero deja el UID real como 0 (root). Un shell generado por un script auxiliar hereda ruid=0 y puede restablecer su UID efectivo a root, lo que permite la escalada de privilegios local.

Information

Published : 2026-08-20 15:17

Updated : 2026-10-18 20:10

NVD link : CVE-2026-61897

Mitre link : CVE-2026-61897

CVE.ORG link : CVE-2026-61897

JSON object : View

Products Affected

No product.

CWE

CWE-273

Improper Check for Dropped Privileges

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