Bug 2509569 - CVE-2026-0708 libucl: libucl: Denial of Service via embedded null byte in UCL input [fedora-43]
Summary: CVE-2026-0708 libucl: libucl: Denial of Service via embedded null byte in UCL...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: libucl
Version: 43
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Timothée Floure
QA Contact:
URL:
Whiteboard: {"flaws": ["a227f760-41e3-4abc-b194-8...
Depends On:
Blocks: CVE-2026-0708
TreeView+ depends on / blocked
 
Reported: 2026-07-30 19:05 UTC by Patrick Del Bello
Modified: 2026-07-30 19:05 UTC (History)
1 user (show)

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

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Description Patrick Del Bello 2026-07-30 19:05:49 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.

A SEGV fault occurs in ucl_object_emit when parsing and emitting an object created in UCL_PARSER_ZEROCOPY mode, if the input UCL contains a key with an embedded null byte (\u0000).
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