Bug 2494775

Summary:	CVE-2026-11611 389-ds-base: 389-ds-base: Content Sync plugin unbounded queue growth and race conditions [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Samuele Negrini <snegrini>
Component:	389-ds-base	Assignee:	Viktor Ashirov <vashirov>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	abokovoy, jachapma, mreynolds, spichugi, tbordaz, vashirov
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---	Flags:	fedora-admin-xmlrpc: mirror+
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["49d1764c-4032-4366-b732-fabd49c93fc5"]}
Fixed In Version:	389-ds-base-3.3.1-3.fc45 389-ds-base-3.1.5-4.fc43 389-ds-base-3.2.3-5.fc44	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-09-25 00:15:57 UTC	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:
Bug Blocks:	2485424

Description Samuele Negrini 2026-06-30 07:33:38 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.

The Content Synchronization (syncrepl) persistent search plugin in 389 Directory Server contains three availability bugs in sync_persist.c:

Bug 1 (primary): Unbounded queue growth — an authenticated user opens a persistent sync search then stops reading responses; modification events queue without limit until memory exhaustion and server crash. Confirmed on UBI 8 and CentOS Stream 8 production binaries (+17MB measured from 500 mods).

Bug 2: sync_persist_terminate() dangling pointer race during connection teardown.

Bug 3: thread_count non-atomic increment/decrement during shutdown (weak memory model architectures).

Vulnerable code present since plugin introduction; no upstream fix as of 2026-04-22.

Comment 1 Aoife Moloney 2026-08-17 15:06:34 UTC

This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.

Comment 2 Viktor Ashirov 2026-09-07 18:40:27 UTC

Fixed in https://github.com/389ds/389-ds-base/commit/9652a30ee

Comment 3 Fedora Update System 2026-09-07 21:23:59 UTC

FEDORA-2026-b16c9cbc0f (389-ds-base-3.2.3-2.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-b16c9cbc0f

Comment 4 Fedora Update System 2026-09-08 01:38:15 UTC

FEDORA-2026-c1e25a4642 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-c1e25a4642`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-c1e25a4642

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

Comment 5 Fedora Update System 2026-09-08 01:58:08 UTC

FEDORA-2026-b16c9cbc0f 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-b16c9cbc0f`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-b16c9cbc0f

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

Comment 6 Fedora Update System 2026-09-08 02:20:34 UTC

FEDORA-2026-0b8bc362b1 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-2026-0b8bc362b1`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-0b8bc362b1

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

Comment 7 Fedora Update System 2026-09-09 05:04:08 UTC

FEDORA-2026-b16c9cbc0f 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-b16c9cbc0f`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-b16c9cbc0f

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

Comment 8 Fedora Update System 2026-09-10 01:46:16 UTC

FEDORA-2026-b16c9cbc0f 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-b16c9cbc0f`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-b16c9cbc0f

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

Comment 9 Fedora Update System 2026-09-10 02:06:39 UTC

FEDORA-2026-0b8bc362b1 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-2026-0b8bc362b1`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-0b8bc362b1

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

Comment 10 Fedora Update System 2026-09-10 02:16:21 UTC

FEDORA-2026-c1e25a4642 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-c1e25a4642`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-c1e25a4642

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

Comment 11 Fedora Update System 2026-09-25 00:15:57 UTC

FEDORA-2026-c1e25a4642 (389-ds-base-3.3.1-3.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 12 Fedora Update System 2026-09-25 00:55:12 UTC

FEDORA-2026-0b8bc362b1 (389-ds-base-3.1.5-4.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 13 Fedora Update System 2026-09-25 01:12:09 UTC

FEDORA-2026-b16c9cbc0f (389-ds-base-3.2.3-5.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.