CVE-2026-62292
libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.1, a crafted uncompressed HEIF image using generic zlib unci full-item compression can crash an application that decodes an advertised tile with heif_image_handle_decode_image_tile(). In libheif/codecs/uncompressed/unc_decoder.cc, unc_decoder::fetch_tile_data() computes a large tile offset and unc_decoder::get_compressed_image_data_uncompressed() validates it with range_start_offset plus range_size. For the last advertised tile (4095, 4095), the addition can wrap to zero, bypass the bounds check, and pass an invalid source pointer and a one-terabyte length to memcpy. The observed result is an out-of-bounds read and process crash; opening the file alone does not trigger the issue because tile decoding is required. This issue is fixed in version 1.23.1.
Scoring
- Severity
- HIGH
- CVSS base score
- 8.7
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- EPSS probability
- 0.45%
- CWE
- CWE-125
- Published
- 2026-08-18
- Last modified
- 2026-09-14
Affected products
- strukturag libheif
Weakness type
Related vulnerabilities
- CVE-2026-78989 — Out of bounds read in ANGLE in Google Chrome on on Windows prior to 152.0.7977.65 allowed a remote attacker to potential
- CVE-2026-87650 — Out of bounds read in WebGL in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to potentially execute arb
- CVE-2026-82072 — Out of bounds read in V8 in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to execute arbitrary code ins
- CVE-2026-78978 — Out of bounds read in ANGLE in Google Chrome on on Windows prior to 152.0.7977.65 allowed a remote attacker to potential
- CVE-2026-87440 — Out of bounds read in Media in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to execute arbitrary code
- CVE-2026-87604 — Out of bounds read in ANGLE in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the re
- CVE-2026-79020 — Out of bounds read in Skia in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to potentially read memory
- CVE-2026-55211 — surfio IRAP header size fields cause out-of-bounds reads