Bug 2550238

Summary:	CVE-2026-107794 perl-ExtUtils-Typemaps-Default: ExtUtils::Typemaps::STL::List: Denial of Service via integer underflow on empty list [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Vladimir Vasilev <vvasilev>
Component:	perl-ExtUtils-Typemaps-Default	Assignee:	Miro Hrončok <mhroncok>
Status:	ON_QA ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	rawhide	CC:	mhroncok, perl-devel, perl-maint
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["cff13b28-043f-4c76-83cb-e67cc0b833f6"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:		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:	2548308
Bug Blocks:	2548974

Description Vladimir Vasilev 2026-10-13 07:34:24 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.

ExtUtils::Typemaps::STL::List versions before 1.07 for Perl allocate a 32 GiB array on an empty list.

The OUTPUT typemaps call av_extend( av, len-1 ). On an empty list, this undeflows, and av_extend will allocate an array with 2^32 slots, leading to memory exhaustion.

Note that a similar issue was fixed in ExtUtils::Typemaps::STL::Vector version 1.05.

Comment 1 Fedora Update System 2026-10-13 18:15:48 UTC

FEDORA-2026-6186a0239f (perl-ExtUtils-Typemaps-Default-1.07-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-6186a0239f

Comment 2 Fedora Update System 2026-10-13 18:15:55 UTC

FEDORA-2026-9989a9a8f5 (perl-ExtUtils-Typemaps-Default-1.07-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-9989a9a8f5

Comment 3 Fedora Update System 2026-10-13 18:16:01 UTC

FEDORA-2026-97823cd220 (perl-ExtUtils-Typemaps-Default-1.07-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-97823cd220

Comment 4 Fedora Update System 2026-10-14 02:18:23 UTC

FEDORA-2026-97823cd220 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-2026-97823cd220`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-97823cd220

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

Comment 5 Fedora Update System 2026-10-14 02:45:49 UTC

FEDORA-2026-6186a0239f 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-2026-6186a0239f`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-6186a0239f

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

Comment 6 Fedora Update System 2026-10-14 02:58:11 UTC

FEDORA-2026-9989a9a8f5 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-2026-9989a9a8f5`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-9989a9a8f5

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