Bug 2539260

Summary:	CVE-2026-84446 libheif: libheif: Denial of Service via crafted HEIF sequence timing data [epel-all]
Product:	[Fedora] Fedora EPEL	Reporter:	Vladimir Vasilev <vvasilev>
Component:	libheif	Assignee:	Michel Lind <michel>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	epel10	CC:	dominik, multimedia-sig, ngompa13
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["ee56454f-fb22-4341-a384-d35101faecbe"]}
Fixed In Version:	libheif-1.23.5-4.el10_3 libheif-1.23.5-2.el9 libheif-1.23.5-4.el10_2	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-10-03 01:07:28 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:	2443911, 2538826

Description Vladimir Vasilev 2026-09-23 09:07:47 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.

libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, crafted HEIF sequence timing and edit-list data can make Track::init_sample_timing_table() compute a logical m_num_output_samples value that exceeds the uint32_t counters used by Track_Visual::decode_next_image_sample() and Track::get_next_sample_raw_data(). The resulting comparison can never reach the oversized output count, causing non-terminating decode or raw-sample loops and bypassing max_sequence_frames. The same sequence path repeatedly calls Box_stts::get_sample_duration() and allocates Chunk::m_sample_ranges and Track::m_presentation_timeline outside MemoryHandle accounting, allowing severe CPU and memory exhaustion from a small file. This issue is fixed in version 1.23.2.

Comment 1 Michel Lind 2026-09-24 11:00:48 UTC

This bug is already fixed in a published Bodhi update.

Comment 2 Fedora Update System 2026-09-24 11:01:25 UTC

FEDORA-EPEL-2026-0d891ec3ad (aom-3.13.3-1.el10_3 and libheif-1.23.5-4.el10_3) has been submitted as an update to Fedora EPEL 10.3.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-0d891ec3ad

Comment 3 Fedora Update System 2026-09-24 11:03:15 UTC

FEDORA-EPEL-2026-12b7f6fc6c (aom-3.13.3-1.el9 and libheif-1.23.5-2.el9) has been submitted as an update to Fedora EPEL 9.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-12b7f6fc6c

Comment 4 Fedora Update System 2026-09-24 11:04:53 UTC

FEDORA-EPEL-2026-3f535077b3 (aom-3.13.3-1.el10_2 and libheif-1.23.5-4.el10_2) has been submitted as an update to Fedora EPEL 10.2.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-3f535077b3

Comment 5 Fedora Update System 2026-09-25 00:39:24 UTC

FEDORA-EPEL-2026-0d891ec3ad has been pushed to the Fedora EPEL 10.3 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-0d891ec3ad

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

Comment 6 Fedora Update System 2026-09-25 00:45:21 UTC

FEDORA-EPEL-2026-12b7f6fc6c has been pushed to the Fedora EPEL 9 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-12b7f6fc6c

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

Comment 7 Fedora Update System 2026-09-25 00:51:50 UTC

FEDORA-EPEL-2026-3f535077b3 has been pushed to the Fedora EPEL 10.2 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-3f535077b3

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

Comment 8 Fedora Update System 2026-10-03 01:07:28 UTC

FEDORA-EPEL-2026-0d891ec3ad (aom-3.13.3-1.el10_3 and libheif-1.23.5-4.el10_3) has been pushed to the Fedora EPEL 10.3 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 9 Fedora Update System 2026-10-09 00:32:48 UTC

FEDORA-EPEL-2026-12b7f6fc6c (aom-3.13.3-1.el9 and libheif-1.23.5-2.el9) has been pushed to the Fedora EPEL 9 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 10 Fedora Update System 2026-10-11 00:29:17 UTC

FEDORA-EPEL-2026-3f535077b3 (aom-3.13.3-1.el10_2 and libheif-1.23.5-4.el10_2) has been pushed to the Fedora EPEL 10.2 stable repository.
If problem still persists, please make note of it in this bug report.