Bug 2530631 - CVE-2026-56855 rootlesskit: golang.org/x/crypto/ssh: Denial of Service via crafted messages [fedora-all]
Summary: CVE-2026-56855 rootlesskit: golang.org/x/crypto/ssh: Denial of Service via cr...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: rootlesskit
Version: rawhide
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Gordon Messmer
QA Contact:
URL:
Whiteboard: {"flaws": ["6149aca5-d0d4-472f-b5bb-7...
Depends On:
Blocks: CVE-2026-56855
TreeView+ depends on / blocked
 
Reported: 2026-09-09 09:44 UTC by jkelly
Modified: 2026-09-30 01:10 UTC (History)
5 users (show)

Fixed In Version: rootlesskit-3.2.0-1.fc46 rootlesskit-3.2.0-1.fc45 rootlesskit-3.2.0-1.fc44 rootlesskit-3.2.0-1.fc43
Clone Of:
Environment:
Last Closed: 2026-09-20 22:13:36 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description jkelly 2026-09-09 09:44:27 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.

Previously, after a channel has been established, a malicious peer could send crafted messages that would deadlock the entire connection. Now, we handle all RFC 4254 channel messages; global requests are handled explicitly. Then, treat all other messages as a protocol error and tear the connection down instead of buffering and blocking.

Comment 1 Fedora Update System 2026-09-20 22:10:24 UTC
FEDORA-2026-ec725c24c1 (rootlesskit-3.2.0-1.fc46) has been submitted as an update to Fedora 46.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-ec725c24c1

Comment 2 Fedora Update System 2026-09-20 22:13:36 UTC
FEDORA-2026-ec725c24c1 (rootlesskit-3.2.0-1.fc46) has been pushed to the Fedora 46 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 3 Fedora Update System 2026-09-21 00:58:18 UTC
FEDORA-2026-6b8872b8ac (rootlesskit-3.2.0-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-6b8872b8ac

Comment 4 Fedora Update System 2026-09-21 03:42:16 UTC
FEDORA-2026-3e60aed77e (rootlesskit-3.2.0-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-3e60aed77e

Comment 5 Fedora Update System 2026-09-21 13:48:24 UTC
FEDORA-2026-f5733c1dd0 (rootlesskit-3.2.0-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-f5733c1dd0

Comment 6 Fedora Update System 2026-09-22 01:34:21 UTC
FEDORA-2026-6b8872b8ac has been pushed to the Fedora 45 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-6b8872b8ac`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-6b8872b8ac

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

Comment 7 Fedora Update System 2026-09-22 01:55:48 UTC
FEDORA-2026-3e60aed77e 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-2026-3e60aed77e`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-3e60aed77e

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

Comment 8 Fedora Update System 2026-09-22 02:20:57 UTC
FEDORA-2026-f5733c1dd0 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-f5733c1dd0`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-f5733c1dd0

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

Comment 9 Fedora Update System 2026-09-30 00:15:32 UTC
FEDORA-2026-6b8872b8ac (rootlesskit-3.2.0-1.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 10 Fedora Update System 2026-09-30 00:51:44 UTC
FEDORA-2026-3e60aed77e (rootlesskit-3.2.0-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 11 Fedora Update System 2026-09-30 01:10:59 UTC
FEDORA-2026-f5733c1dd0 (rootlesskit-3.2.0-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.


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