CVE-2026-84446
published 2026-09-18CVE-2026-84446: 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…
PriorityP342high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.46%
38.3th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| strukturag | libheif | < 1.23.2 | 1.23.2 |
| ubuntu | libheif | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vendor_ubuntu7.5HIGH
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Bugzilla
CVE-2026-84446 libheif: libheif: Denial of Service via crafted HEIF sequence timing data [fedora-43]
bugzilla·2026-09-23·CVSS 7.5
CVE-2026-84446 [HIGH] CVE-2026-84446 libheif: libheif: Denial of Service via crafted HEIF sequence timing data [fedora-43]
CVE-2026-84446 libheif: libheif: Denial of Service via crafted HEIF sequence timing data [fedora-43]
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
Bugzilla
CVE-2026-84446 libheif: libheif: Denial of Service via crafted HEIF sequence timing data [epel-all]
bugzilla·2026-09-23·CVSS 7.5
CVE-2026-84446 [HIGH] CVE-2026-84446 libheif: libheif: Denial of Service via crafted HEIF sequence timing data [epel-all]
CVE-2026-84446 libheif: libheif: Denial of Service via crafted HEIF sequence timing data [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. 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_
2026-09-18
Published