Linux · SUSE Linux Enterprise · Security advisory · September 21, 2026

SUSE-SU-2026:4276-1: libheif security update

SUSE-SU-2026:4276-1, released September 21, 2026, fixes 8 CVEs in libheif (version 1.23.4-150700.3.21.1). None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent

CVEs closed

1 rated Critical

Exploited

None reported

Highest CVSS

9.8

Base score, 0 to 10

Highest EPSS

0.0072

54th percentile

Priority of the 8 CVEs

Patch now 0
                                Urgent 1
                                High 4
                                Routine 3

Fixed package versions

Product	Release	Fixed in
libheif	sles 15.7	1.23.4-150700.3.21.1

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Urgent	CVE-2026-84383	libheif: libheif is a HEIF and AVIF file format decoder and encoder	9.8	0.0072	None reported
High	CVE-2026-84384	libheif: libheif is a HEIF and AVIF file format decoder and encoder	7.5	0.0052	None reported
High	CVE-2026-84447	libheif: libheif is a HEIF and AVIF file format decoder and encoder	7.5	0.0052	None reported
High	CVE-2026-84444	libheif: libheif is a HEIF and AVIF file format decoder and encoder	7.4	0.0048	None reported
High	CVE-2026-84446	libheif: libheif is a HEIF and AVIF file format decoder and encoder	7.5	0.0046	None reported
Routine	CVE-2026-84451	libheif: libheif is a HEIF and AVIF file format decoder and encoder	6.5	0.0031	None reported
Routine	CVE-2026-84450	libheif: libheif is a HEIF and AVIF file format decoder and encoder	4.3	0.0028	None reported
Routine	CVE-2026-84448	libheif: libheif is a HEIF and AVIF file format decoder and encoder	4.0	0.0019	None reported

Also fixes CVE-2026-84383

OPENSUSE-SU-2026:21889-1
libheif on opensuse-leap 16.0
DEBIAN-CVE-2026-84383
libheif on Debian 14

Vendor advisory

https://osv.dev/vulnerability/SUSE-SU-2026:4276-1

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