Bug 2509792 - CVE-2026-11564 curl: libcurl: Certificate validation bypass due to incorrect connection reuse [fedora-all]
Summary: CVE-2026-11564 curl: libcurl: Certificate validation bypass due to incorrect ...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: curl
Version: 45
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Jan Macku
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["4e93f5bc-0a7e-461d-9f83-8...
Depends On:
Blocks: CVE-2026-11564
TreeView+ depends on / blocked
 
Reported: 2026-07-31 14:54 UTC by Tomas Hoger
Modified: 2026-08-27 08:35 UTC (History)
7 users (show)

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


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Description Tomas Hoger 2026-07-31 14:54:06 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.

libcurl keeps previously used connections in a connection pool for subsequent
transfers to reuse if one of them matches the setup.

An easy handle that first uses default native CA trust can continue trusting
the native platform store after the application switches that same handle to
custom CA material for a later transfer.

Comment 1 Aoife Moloney 2026-08-17 15:44:27 UTC
This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.

Comment 2 Jan Macku 2026-08-27 08:35:12 UTC
f43 is not affected - Affected versions: curl 8.17.0 to and including 8.20.0


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