Bug 2539270

Summary:	CVE-2026-84451 libheif: libheif: Denial of Service due to out-of-bounds read in image tile processing [epel-10]
Product:	[Fedora] Fedora EPEL	Reporter:	Vladimir Vasilev <vvasilev>
Component:	libheif	Assignee:	Michel Lind <michel>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	epel10	CC:	dominik, multimedia-sig, ngompa13
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["0b176165-3a06-42a0-a575-2e84e544a8d0"]}
Fixed In Version:	libheif-1.23.5-4.el10_4 libheif-1.23.5-4.el10_3 libheif-1.23.5-4.el10_2	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-10-03 00:52:18 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, 2538885

Description Vladimir Vasilev 2026-09-23 09:09:50 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. From 1.19.0 until 1.23.3, the no-icef full-item branch of unc_decoder::get_compressed_image_data_uncompressed() in libheif/codecs/uncompressed/unc_decoder.cc retains an addition-based range check that can wrap when a crafted uncompressed tile grid produces a large range_start_offset and range_size. The overflow makes the bounds comparison pass and allows heif_image_handle_decode_image_tile() to call memcpy() with an invalid source pointer and a very large length when decoding a valid high-index advertised tile. This incomplete remediation of CVE-2026-62292 can reliably crash tile-processing applications, while whole-image decoding is not claimed to reach the demonstrated path. This issue is fixed in version 1.23.3.

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 11:01:36 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 11:04:49 UTC

FEDORA-EPEL-2026-18d39b7b8d (aom-3.13.3-1.el10_4 and libheif-1.23.5-4.el10_4) has been submitted as an update to Fedora EPEL 10.4.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-18d39b7b8d

Comment 4 Fedora Update System 2026-09-24 11:05:03 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 00:29:14 UTC

FEDORA-EPEL-2026-18d39b7b8d has been pushed to the Fedora EPEL 10.4 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-18d39b7b8d

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 00:39:32 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 7 Fedora Update System 2026-09-25 00:52:01 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 00:52:18 UTC

FEDORA-EPEL-2026-18d39b7b8d (aom-3.13.3-1.el10_4 and libheif-1.23.5-4.el10_4) has been pushed to the Fedora EPEL 10.4 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 9 Fedora Update System 2026-10-03 01:07:39 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 10 Fedora Update System 2026-10-11 00:29:25 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.