Bug 2523674

Summary:	CVE-2026-79992 emacs: local shell command injection through the user field in emacs tramp [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Marco Benatto <mbenatto>
Component:	emacs	Assignee:	Daiki Ueno <dueno>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	44	CC:	benson_muite, dan.cermak, dueno, gordon.messmer, marcandre.lureau, mavit, msekleta, phracek
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["11200807-528b-4e86-9aaa-b68fa1343384"]}
Fixed In Version:	emacs-30.2-29.fc44 emacs-30.2-11.fc43	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-09-02 01:33:51 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:	2523665

Description Marco Benatto 2026-08-25 17:10:37 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.

Emacs TRAMP is vulnerable to a local shell command injection when processing maliciously crafted filenames. The vulnerability arises from the fact of TRAMP concatenating login arguments without a proper sanitization and further passing the result into a local shell.

Comment 1 Peter Oliver 2026-08-26 23:12:20 UTC

More info and patches at https://www.openwall.com/lists/oss-security/2026/08/21/1

Comment 2 Fedora Update System 2026-08-28 14:10:13 UTC

FEDORA-2026-e47f5a0b84 (emacs-30.2-29.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-e47f5a0b84

Comment 3 Fedora Update System 2026-08-28 18:15:10 UTC

FEDORA-2026-6b1a89dfe6 (emacs-30.2-11.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-6b1a89dfe6

Comment 4 Fedora Update System 2026-08-31 17:51:17 UTC

FEDORA-2026-e47f5a0b84 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-e47f5a0b84`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-e47f5a0b84

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

Comment 5 Fedora Update System 2026-08-31 18:12:02 UTC

FEDORA-2026-6b1a89dfe6 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-2026-6b1a89dfe6`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-6b1a89dfe6

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

Comment 6 Fedora Update System 2026-09-02 01:33:51 UTC

FEDORA-2026-e47f5a0b84 (emacs-30.2-29.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 2026-09-08 00:56:23 UTC

FEDORA-2026-6b1a89dfe6 (emacs-30.2-11.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.