Bug 2553038 (CVE-2026-110928) - CVE-2026-110928 openssh: openssh: authorized_keys restrict does not apply to tunnel forwarding
Summary: CVE-2026-110928 openssh: openssh: authorized_keys restrict does not apply to ...
Keywords:
Status: NEW
Alias: CVE-2026-110928
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-15 04:29 UTC by OSIDB Bzimport
Modified: 2026-10-15 04:38 UTC (History)
18 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-10-15 04:29:32 UTC 
A flaw was found in OpenSSH sshd. The authorized_keys "restrict" keyword was not applied to tunnel forwarding. A key or certificate principal marked restrict could still open a tunnel when PermitTunnel was enabled. PermitTunnel is disabled by default. This is separate from the tunnel check added in OpenSSH 10.5 (CVE-2026-73283). The RHEL maintainer reported that the downstream patch openssh-10.4p1-CVE-2026-59999.patch is stricter than the upstream fix, so Red Hat Enterprise Linux is not affected. Reserve the CVE for upstream. Do not file RHEL trackers.
Note You need to log in before you can comment on or make changes to this bug.