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CVE-2026-86469— Glib2: toctou symlink race in `g_file_create_replace_destination` fallback path

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.

GNOME glib是GNOME基金会开源的一个通用的、可移植的实用程序库。提供了许多有用的数据类型、宏、类型转换、字符串实用程序、文件实用程序、主循环抽象等。 GNOME glib存在后置链接漏洞，该漏洞源于在g_file_replace()使用G_FILE_CREATE_REPLACE_DESTINATION时，创建.goutputstream临时文件失败后，库会在没有独占创建或符号链接保护的情况下删除目标文件并重新创建，本地攻击者可利用该竞态条件将写入操作重定向到其他文件。

CVSS 5.3 · Medium EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 11

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
any affected
Red Hat Red Hat Enterprise Linux 6 any affected
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
any affected
Red Hat Red Hat Enterprise Linux 9 any affected
any affected
Red Hat Red Hat Hardened Images any affected
Red Hat Red Hat OpenShift Container Platform 4 any affected
any affected
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I. Basic Information for CVE-2026-86469

Vulnerability Information
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Vulnerability Title
Glib2: toctou symlink race in `g_file_create_replace_destination` fallback path
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in GLib2. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION and creating the .goutputstream-XXXXXX temporary file fails, the library unlinks the destination and recreates it without exclusive creation or symlink protection. A local attacker who can write to the destination directory can win that race and redirect the write to another file.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
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
Vulnerability Title
GNOME glib 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GNOME glib是GNOME基金会开源的一个通用的、可移植的实用程序库。提供了许多有用的数据类型、宏、类型转换、字符串实用程序、文件实用程序、主循环抽象等。 GNOME glib存在后置链接漏洞，该漏洞源于在g_file_replace()使用G_FILE_CREATE_REPLACE_DESTINATION时，创建.goutputstream临时文件失败后，库会在没有独占创建或符号链接保护的情况下删除目标文件并重新创建，本地攻击者可利用该竞态条件将写入操作重定向到其他文件。
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
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
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 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat Hardened Images - cpe:/a:redhat:hummingbird:1
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-86469

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III. Intelligence Information for CVE-2026-86469

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Vendor Advisories for CVE-2026-86469 (2)

Other References for CVE-2026-86469 (2)

Same Patch Batch · Red Hat · 2026-09-07 · 10 CVEs total

CVE-2026-18922 9.8 CRITICAL 389-ds-base: 389-ds-base: sasl plain authentication allows privilege escalation to directo
CVE-2026-76578 9.8 CRITICAL Ipa: freeipa: freeipa: unauthenticated ldap client can obtain administrator credentials vi
CVE-2026-86404 8.8 HIGH Artemis-server: artemis-jms-client: artemis-core-client: undertow-core: wildfly-messaging-
CVE-2026-19843 8.4 HIGH 389-ds-base: 389-ds-base: command injection via unescaped ldap dn in cockpit 389 console l
CVE-2026-79678 8.1 HIGH Freeipa: idm: freeipa: idp-add eval() reachable before authorization check allows environm
CVE-2026-18453 7.5 HIGH 389-ds-base: 389-ds-base: pre-authentication null pointer dereference via paged results an
CVE-2026-18355 7.5 HIGH 389-ds-base: 389-ds-base: heap buffer overflow via sasl wrapped-record length lower-bound
CVE-2026-76560 7.5 HIGH 389-ds-base: 389-ds: anonymous ldap client can defeat selfdn aci bind-rule checks via empt
CVE-2026-86332 6.5 MEDIUM Odh-dashboard: odh-dashboard: nim credential secret readable by any authenticated user

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-86469

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