Bug 2494881

Summary: CVE-2026-58014 mingw-glib2: off-by-one error in glib/gkeyfile.c via "g_key_file_get_locale_string_list" [fedora-all]
Product: [Fedora] Fedora Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: mingw-glib2Assignee: Kalev Lember <kalevlember>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: fedora, kalevlember, manisandro, marcandre.lureau, rjones
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["6690ebf4-f2ae-4629-9e6c-0eff1af87136"]}
Fixed In Version: mingw-glib2-2.88.2-2.fc44 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-07-17 00:52:40 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2492255    

Description Guilherme de Almeida Suckevicz 2026-06-30 13:01:15 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

A heap-buffer-overflow READ of 1 byte occurs in g_key_file_get_locale_string_list() at gkeyfile.c:2464 when the resolved locale string value is an empty string (""). The function computes len = strlen(value) which yields 0, then accesses value[len - 1]. Since len is gsize(unsigned), len - 1 wraps to SIZE_MAX, causing a read of 1 byte before the heap allocation (under-read). Any application that loads a key file from untrusted input and calls g_key_file_get_locale_string_list() on a key whose value is empty is affected. The key file format is commonly used for .desktop files and application configuration.

Comment 1 Fedora Update System 2026-07-02 17:13:29 UTC
FEDORA-2026-5a55313adb (mingw-glib2-2.88.2-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-5a55313adb

Comment 2 Fedora Update System 2026-07-03 01:26:30 UTC
FEDORA-2026-5a55313adb has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-5a55313adb`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-5a55313adb

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 3 Fedora Update System 2026-07-09 01:45:53 UTC
FEDORA-2026-7bf2937528 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-7bf2937528`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-7bf2937528

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 4 Fedora Update System 2026-07-17 00:52:40 UTC
FEDORA-2026-7bf2937528 (mingw-glib2-2.88.2-2.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.