Mageia alert MGASA-2026-0247 (libheif)

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Mageia Updates <updates-announce@ml.mageia.org>
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updates-announce@ml.mageia.org
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[updates-announce] MGASA-2026-0247: Updated libheif packages fix security vulnerabilities
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Mon, 13 Jul 2026 23:25:38 +0200
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<20260713212538.2E31FA0105@duvel.mageia.org>
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Article
MGASA-2026-0247 - Updated libheif packages fix security vulnerabilities

Publication date: 13 Jul 2026
URL: https://advisories.mageia.org/MGASA-2026-0247.html
Type: security
Affected Mageia releases: 10
CVE: CVE-2026-32738,
     CVE-2026-32739,
     CVE-2026-32740,
     CVE-2026-32741,
     CVE-2026-32814,
     CVE-2026-32882,
     CVE-2026-3950,
     CVE-2026-41069,
     CVE-2026-41071,
     CVE-2026-47178,
     CVE-2026-49271

Description:
libheif has a Heap OOB Read/SEGV Crash via Zero samples_per_chunk.
(CVE-2026-32738)
libheif is Vulnerable to Infinite Loop DoS via stts Sample Duration
Lookup. (CVE-2026-32739)
Heap-Buffer-Overflow Write in Grid Tile Chroma Compositing.
(CVE-2026-32740)
libheif has a heap buffer overflow in decode_mask_image().
(CVE-2026-32741)
Uninitialized Heap Memory Information Leak via Failed Grid Tiles.
(CVE-2026-32814)
Heap Buffer OOB Read in overlay compositing due to wrong alpha stride.
(CVE-2026-32882)
strukturag libheif stsz/stts track.cc load out-of-bounds.
(CVE-2026-3950)
libheif allows Out-of-bounds vector access leading to invalid
dereference (DoS). (CVE-2026-41069)
Heap buffer over-read in SampleAuxInfoReader via crafted HEIF sequence
file with mismatched saiz sample count. (CVE-2026-41071)
A critical heap-based buffer overflow vulnerability exists in libheif
v1.21.2 (and likely earlier versions) within the handling of
uncompressed HEIF images (ISO/IEC 23001-17, unci item type). When
processing a tiled image with chroma subsampling (e.g., 4:2:0 or 4:2:2),
the library fails to scale spatial offsets for the chroma planes. This
leads to out-of-bounds memory writes when decoding any tile other than
the top-left one, potentially resulting in remote code execution.
(CVE-2026-47178)
Wrapped icef compressed-unit range check causes out-of-bounds read in
uncompressed HEIF decoder. (CVE-2026-49271)

References:
- https://bugs.mageia.org/show_bug.cgi?id=35729
- https://ubuntu.com/security/notices/USN-8454-1
- https://ubuntu.com/security/notices/USN-8479-1
- https://www.cve.org/CVERecord?id=CVE-2026-32738
- https://www.cve.org/CVERecord?id=CVE-2026-32739
- https://www.cve.org/CVERecord?id=CVE-2026-32740
- https://www.cve.org/CVERecord?id=CVE-2026-32741
- https://www.cve.org/CVERecord?id=CVE-2026-32814
- https://www.cve.org/CVERecord?id=CVE-2026-32882
- https://www.cve.org/CVERecord?id=CVE-2026-3950
- https://www.cve.org/CVERecord?id=CVE-2026-41069
- https://www.cve.org/CVERecord?id=CVE-2026-41071
- https://www.cve.org/CVERecord?id=CVE-2026-47178
- https://www.cve.org/CVERecord?id=CVE-2026-49271

SRPMS:
- 10/core/libheif-1.20.2-3.1.mga10
- 10/tainted/libheif-1.20.2-3.1.mga10.tainted