Bug 2494867

Summary: CVE-2026-58010 mingw-glib2: buffer over-read in glib/gvariant-serialiser.c via gvs_tuple_is_normal() [fedora-all]
Product: [Fedora] Fedora Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: mingw-glib2Assignee: Kalev Lember <kalevlember>
Status: ON_QA --- 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": ["30401a73-6694-4570-9292-184c82669c4a"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 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: 2492243    

Description Guilherme de Almeida Suckevicz 2026-06-30 12:57:23 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.

gvs_tuple_is_normal() in glib/gvariant-serialiser.c:1253 has an off-by-one error in its alignment padding check. When checking whether padding bytes are zero, the bounds check uses > instead of >=, allowing a 1-byte out-of-bounds read when offset == value.size.

Comment 1 Fedora Update System 2026-07-02 17:12:10 UTC
FEDORA-2026-825932ea60 (mingw-glib2-2.86.5-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-825932ea60

Comment 2 Fedora Update System 2026-07-02 17:13:16 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 3 Fedora Update System 2026-07-03 01:26:19 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 4 Fedora Update System 2026-07-03 01:47:31 UTC
FEDORA-2026-825932ea60 has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-825932ea60`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-825932ea60

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

Comment 5 Fedora Update System 2026-07-09 01:27:07 UTC
FEDORA-2026-8e39f35701 has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-8e39f35701`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-8e39f35701

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

Comment 6 Fedora Update System 2026-07-09 01:45:43 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.