Bug 2539250

Summary:	CVE-2026-94054 exim: Exim: Arbitrary code execution via attacker-controlled Proxy-Protocol [epel-all]
Product:	[Fedora] Fedora EPEL	Reporter:	Vladimir Vasilev <vvasilev>
Component:	exim	Assignee:	Jaroslav Škarvada <jskarvad>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	epel10	CC:	bennie.joubert, dwmw2, jskarvad, martin.fraenzl
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["2c5ee259-eb31-4d1a-9073-41eda6dfe07b"]}
Fixed In Version:	exim-4.100.1-1.el9 exim-4.100.1-1.el10_4 exim-4.100.1-1.el8	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-10-15 00:30:07 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:	2538158

Description Vladimir Vasilev 2026-09-23 09:03:54 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.

Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write.

Comment 1 Fedora Update System 2026-10-06 15:46:13 UTC

FEDORA-EPEL-2026-15b5988543 (exim-4.100.1-1.el10_4) has been submitted as an update to Fedora EPEL 10.4.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-15b5988543

Comment 2 Fedora Update System 2026-10-06 15:50:07 UTC

FEDORA-EPEL-2026-61a5ea9fcd (exim-4.100.1-1.el9) has been submitted as an update to Fedora EPEL 9.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-61a5ea9fcd

Comment 3 Fedora Update System 2026-10-06 15:56:44 UTC

FEDORA-EPEL-2026-71b80f48fa (exim-4.100.1-1.el8) has been submitted as an update to Fedora EPEL 8.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-71b80f48fa

Comment 4 Fedora Update System 2026-10-07 02:06:38 UTC

FEDORA-EPEL-2026-15b5988543 has been pushed to the Fedora EPEL 10.4 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-15b5988543

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

Comment 5 Fedora Update System 2026-10-07 02:33:45 UTC

FEDORA-EPEL-2026-61a5ea9fcd has been pushed to the Fedora EPEL 9 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-61a5ea9fcd

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

Comment 6 Fedora Update System 2026-10-07 02:34:17 UTC

FEDORA-EPEL-2026-71b80f48fa has been pushed to the Fedora EPEL 8 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-71b80f48fa

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

Comment 7 Fedora Update System 2026-10-15 00:30:07 UTC

FEDORA-EPEL-2026-61a5ea9fcd (exim-4.100.1-1.el9) has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 8 Fedora Update System 2026-10-15 00:44:25 UTC

FEDORA-EPEL-2026-15b5988543 (exim-4.100.1-1.el10_4) has been pushed to the Fedora EPEL 10.4 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 9 Fedora Update System 2026-10-15 01:09:29 UTC

FEDORA-EPEL-2026-71b80f48fa (exim-4.100.1-1.el8) has been pushed to the Fedora EPEL 8 stable repository.
If problem still persists, please make note of it in this bug report.