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CVE-2026-61897— accountsservice: incomplete privilege drop when running Ubuntu-specific language helper scripts

Quick assessment

Affected
Canonical accountsservice
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Canonical AccountsService是英国Canonical公司开源的一个提供用户账户信息查询与操作的系统服务。 Canonical AccountsService 23.13.9-8ubuntu7之前版本存在权限许可和访问控制问题漏洞，该漏洞源于在启动语言辅助脚本时仅部分撤销权限，保留了实际UID为0（root），可能导致本地权限提升。

CVSS 7.8 · High EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 4

VendorProduct Version RangeStatus
Canonical accountsservice 22.07.5-2ubuntu1< 22.07.5-2ubuntu1.6 affected
23.13.9-2ubuntu6< 23.13.9-2ubuntu6.1 affected
23.13.9-8ubuntu5< 23.13.9-8ubuntu5.2 affected
23.13.9-8ubuntu6< 23.13.9-8ubuntu7 affected
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I. Basic Information for CVE-2026-61897

Vulnerability Information
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Vulnerability Title
accountsservice: incomplete privilege drop when running Ubuntu-specific language helper scripts
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对于放弃特权的检查不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Canonical AccountsService 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Canonical AccountsService是英国Canonical公司开源的一个提供用户账户信息查询与操作的系统服务。 Canonical AccountsService 23.13.9-8ubuntu7之前版本存在权限许可和访问控制问题漏洞，该漏洞源于在启动语言辅助脚本时仅部分撤销权限，保留了实际UID为0（root），可能导致本地权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Canonical accountsservice 22.07.5-2ubuntu1 ~ 22.07.5-2ubuntu1.6 -

II. Public POCs for CVE-2026-61897

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III. Intelligence Information for CVE-2026-61897

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Vendor Advisories for CVE-2026-61897 (2)

Same Patch Batch · Canonical · 2026-08-20 · 3 CVEs total

CVE-2026-61898 7.8 HIGH accountsservice: shell injection via attacker-controlled ~/.pam_environment in Ubuntu lang
CVE-2026-77113 6.7 MEDIUM Path Traversal Vulnerability in apport-unpack

IV. Related Vulnerabilities

Same product: accountsservice
Same vendor: Canonical
Same weakness: CWE-273

V. Comments for CVE-2026-61897

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