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CVE-2026-112210— Rhc: rhc: local privilege escalation via symlink following in rhc-canonical-facts.service

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
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.

在随 RHC 发布的 systemd 服务单元中发现了一个缺陷。该服务以 root 身份运行，并在一个由无特权系统用户拥有的目录中操作文件，但未验证该文件是否为符号链接。如果本地攻击者已经攻破了拥有特权的 yggdrasil 系统服务账户，便可利用此缺陷获取任意文件的所有权，从而导致权限提升至 root。

CVSS 6.0 · Medium

Possible ATT&CK Techniques 2 AI

T1551 T1548.001 · Setuid and Setgid
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I. Basic Information for CVE-2026-112210

Vulnerability Information
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Vulnerability Title
Rhc: rhc: local privilege escalation via symlink following in rhc-canonical-facts.service
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the rhc-canonical-facts.service systemd unit shipped with rhc. The service runs as root and operates on a file inside a directory owned by an unprivileged system user without verifying that the file is not a symbolic link. A local attacker who has already compromised the privileged yggdrasil system service account can exploit this to gain ownership of arbitrary files, leading to privilege escalation to root.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-112210

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III. Intelligence Information for CVE-2026-112210

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Vendor Advisories for CVE-2026-112210 (2)

Same Patch Batch · Red Hat · 2026-10-19 · 5 CVEs total

CVE-2026-16487 8.1 HIGH Bootc: containers-common: bootc: automatic updates can apply unsigned mutable-tag content
CVE-2026-103314 7.4 HIGH Stackrox: stackrox: saml response replay allows multiple central authentication tokens
CVE-2026-16460 7.4 HIGH Bootc: ostree: bootc/ostree: staged deployments not revalidated against container signatur
CVE-2026-112214 6.5 MEDIUM Gstreamer1-plugins-ugly-free: gstreamer1-plugins-ugly-free: unbounded memory allocation in

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-59

V. Comments for CVE-2026-112210

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