Bug 2453212 - CVE-2026-4046 glibc: glibc: Denial of Service via iconv() function with specific character sets [fedora-all]
Summary: CVE-2026-4046 glibc: glibc: Denial of Service via iconv() function with speci...
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Fedora
Classification: Fedora
Component: glibc
Version: rawhide
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Carlos O'Donell
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["6c33fc1f-0df3-4a0a-b92d-2...
Depends On:
Blocks: CVE-2026-4046
TreeView+ depends on / blocked
 
Reported: 2026-03-30 21:06 UTC by Jon Moroney
Modified: 2026-05-29 14:50 UTC (History)
15 users (show)

Fixed In Version: glibc-2.42-12.fc43 glibc-2.43-4.fc44 glibc-2.43.9000-12.fc45
Clone Of:
Environment:
Last Closed: 2026-05-29 13:27:00 UTC
Type: ---
Embargoed:

Attachments (Terms of Use)

Description Jon Moroney 2026-03-30 21:06:06 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.
Comment 1 Siddhesh Poyarekar 2026-03-31 11:46:11 UTC 
As upstream CNA, the severity of "High" seems excessive even in the general case.  The only impact here is a DoS and it can easily be mitigated by (in the Red Hat context) dropping the glibc-gconv-extra package or minimally disabling the two gconv errant plugins; those converters are not in common use anyway.
Comment 2 Carlos O'Donell 2026-04-17 13:32:24 UTC 
The top-level security bug 2453117 is set to "Medium" severity. I'm adjusting this to match.
Comment 3 Fedora Update System 2026-04-30 21:23:25 UTC 
FEDORA-2026-ced72ab158 (glibc-2.43-4.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-ced72ab158
Comment 4 Fedora Update System 2026-04-30 22:40:07 UTC 
FEDORA-2026-4b7780802c (glibc-2.42-12.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-4b7780802c
Comment 5 Fedora Update System 2026-05-01 03:16:32 UTC 
FEDORA-2026-ced72ab158 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-ced72ab158`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-ced72ab158

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
Comment 6 Fedora Update System 2026-05-02 02:11:45 UTC 
FEDORA-2026-ced72ab158 (glibc-2.43-4.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.
Comment 7 Fedora Update System 2026-05-02 03:15:22 UTC 
FEDORA-2026-4b7780802c 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-2026-4b7780802c`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-4b7780802c

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
Comment 8 Fedora Update System 2026-05-03 01:18:29 UTC 
FEDORA-2026-4b7780802c (glibc-2.42-12.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.
Comment 9 Arjun Shankar 2026-05-29 13:27:00 UTC 
This is also fixed in rawhide with glibc-2.43.9000-12.fc45.
Note You need to log in before you can comment on or make changes to this bug.