CVE-2026-84450: falha de média gravidade em strukturag libheif
libheif: `clap` + oversized `ispe` aborts on an assert in `Fraction::Fraction` (incomplete fix for CVE-2026-62289)
Publicada em · Atualizada em
Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.
13Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 4.3epss 0.3%
libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.3, a crafted image item containing a clap property and an ispe width or height greater than INT32_MAX + 1 can reach crop calculations through heif_image_handle_get_image_tiling(). Box_clap::left_rounded() or Box_clap::top_rounded() passes the image dimension minus one to Fraction::Fraction(), whose uint32_t constructor uses an assertion as input validation, causing assert-enabled builds to abort. Release builds can instead compute invalid crop geometry, and the tiling API returns dimensions that the normal decode security limits reject. This issue is fixed in version 1.23.3.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Produtos afetados
strukturag · libheifCVEs relacionadas — strukturag libheif
No mesmo produto, das mais perigosas para as menos.
CVE-2026-84383CRITICALlibheif: Heap buffer overflow in `scale_nearest_neighbor()` via duplicate Alpha planes from nested `iden`/`auxl` itemsEPSS 0.7%CVE-2026-32882HIGHlibheif: Heap Buffer OOB Read in overlay compositing due to wrong alpha strideEPSS 0.7%CVE-2026-32740HIGHlibheif: Heap-Buffer-Overflow Write in Grid Tile Chroma CompositingEPSS 0.7%CVE-2026-50142HIGHlibheif: unbounded heap allocation in HEIF sequence parser (stsz fixed-size mode missing bound check)EPSS 0.7%CVE-2026-62292HIGHlibheif: Out-of-bounds read in uncompressed unci tile range slicingEPSS 0.6%CVE-2026-84447HIGHlibheif: Derived-image indirect reference chains and tiled offsets bypass decode caching and MemoryHandle limits, causing CPU/memory amplification DoSEPSS 0.5%