CVE-2026-50142
published 2026-08-18CVE-2026-50142: libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.0, a crafted HEIF sequence accepted by heif_context_read_from_memory() with…
PriorityP342high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.66%
50.3th percentile
libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.0, a crafted HEIF sequence accepted by heif_context_read_from_memory() with the msf1 sequence brand can cause unbounded heap allocation. In libheif/sequences/seq_boxes.cc, Box_stsz::parse() applies max_sequence_frames only to variable-size samples, so fixed-size mode accepts an attacker-controlled sample_count without a bound. In libheif/sequences/track.cc, Track::load() also adds current_sample_idx and samples_per_chunk in 32-bit arithmetic, allowing the consistency check to be bypassed by wraparound. The resulting values reach the Chunk::Chunk() allocation path, which can consume gigabytes of memory and crash or stall the process through memory exhaustion. This issue is fixed in version 1.23.0.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| strukturag | libheif | — | — |
| ubuntu | libheif | — | — |
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Bugzilla
CVE-2026-50142 libheif: libheif: Denial of Service via unbounded heap allocation in HEIF sequence parser [fedora-all]
bugzilla·2026-08-24·CVSS 7.5
CVE-2026-50142 [HIGH] CVE-2026-50142 libheif: libheif: Denial of Service via unbounded heap allocation in HEIF sequence parser [fedora-all]
CVE-2026-50142 libheif: libheif: Denial of Service via unbounded heap allocation in HEIF sequence parser [fedora-all]
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 1.23.0, a crafted HEIF sequence accepted by heif_context_read_from_memory() with the msf1 sequence brand can cause unbounded heap allocation. In libheif/sequences/seq_boxes.cc, Box_stsz::parse() applies max_sequence_frames only to variable-size samples, so fixed-size mode accepts an attacker-controlled sample_count without a bound. In libheif/sequences/track.cc, Track::load()
Bugzilla
CVE-2026-50142 libheif: libheif: Denial of Service via unbounded heap allocation in HEIF sequence parser [epel-all]
bugzilla·2026-08-24·CVSS 7.5
CVE-2026-50142 [HIGH] CVE-2026-50142 libheif: libheif: Denial of Service via unbounded heap allocation in HEIF sequence parser [epel-all]
CVE-2026-50142 libheif: libheif: Denial of Service via unbounded heap allocation in HEIF sequence parser [epel-all]
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 1.23.0, a crafted HEIF sequence accepted by heif_context_read_from_memory() with the msf1 sequence brand can cause unbounded heap allocation. In libheif/sequences/seq_boxes.cc, Box_stsz::parse() applies max_sequence_frames only to variable-size samples, so fixed-size mode accepts an attacker-controlled sample_count without a bound. In libheif/sequences/track.cc, Track::load() a
Bugzilla
CVE-2026-50142 libheif: libheif: Denial of Service via unbounded heap allocation in HEIF sequence parser
bugzilla·2026-08-18·CVSS 7.5
CVE-2026-50142 [HIGH] CVE-2026-50142 libheif: libheif: Denial of Service via unbounded heap allocation in HEIF sequence parser
CVE-2026-50142 libheif: libheif: Denial of Service via unbounded heap allocation in HEIF sequence parser
libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.0, a crafted HEIF sequence accepted by heif_context_read_from_memory() with the msf1 sequence brand can cause unbounded heap allocation. In libheif/sequences/seq_boxes.cc, Box_stsz::parse() applies max_sequence_frames only to variable-size samples, so fixed-size mode accepts an attacker-controlled sample_count without a bound. In libheif/sequences/track.cc, Track::load() also adds current_sample_idx and samples_per_chunk in 32-bit arithmetic, allowing the consistency check to be bypassed by wraparound. The resulting values reach the Chunk::Chunk() allocation path, which can consume gigabytes of memory an
2026-08-18
Published