CVE-2026-47251
published 2026-07-21CVE-2026-47251: libheif is a HEIF and AVIF file format decoder and encoder. The fix for CVE-2026-3949 (commit `b97c8b5`, PR #1712) introduced an integer overflow in the very…
PriorityP425medium6.1CVSS 3.1
AVLACLPRNUIRSUCLINAH
EPSS
0.18%
7.8th percentile
libheif is a HEIF and AVIF file format decoder and encoder. The fix for CVE-2026-3949 (commit `b97c8b5`, PR #1712) introduced an integer overflow in the very security check it added. The check itself can be bypassed, allowing a crafted HEIF file with a VVC track to trigger the same out-of-bounds heap read that CVE-2026-3949 was meant to prevent. This is a separate, currently-unpatched vulnerability. Issue #1712 was closed as fixed without testing the edge case where `size` is near `UINT32_MAX`. Version 1.22.0 patches the issue.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| struktur | libheif | < 1.22.0 | 1.22.0 |
CVSS provenance
nvdv3.16.1MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
nvdv4.06.8MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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No advisories linked to this vulnerability.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-47251 libheif: libheif: Denial of Service and information disclosure via crafted HEIF file [fedora-all]
bugzilla·2026-07-22·CVSS 3.3
CVE-2026-47251 [LOW] CVE-2026-47251 libheif: libheif: Denial of Service and information disclosure via crafted HEIF file [fedora-all]
CVE-2026-47251 libheif: libheif: Denial of Service and information disclosure via crafted HEIF file [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. The fix for CVE-2026-3949 (commit `b97c8b5`, PR #1712) introduced an integer overflow in the very security check it added. The check itself can be bypassed, allowing a crafted HEIF file with a VVC track to trigger the same out-of-bounds heap read that CVE-2026-3949 was meant to prevent. This is a separate, currently-unpatched vulnerability. Issue #1712 was closed as fixed without testing the edge c
Bugzilla
CVE-2026-47251 libheif: libheif: Denial of Service and information disclosure via crafted HEIF file [epel-all]
bugzilla·2026-07-22·CVSS 3.3
CVE-2026-47251 [LOW] CVE-2026-47251 libheif: libheif: Denial of Service and information disclosure via crafted HEIF file [epel-all]
CVE-2026-47251 libheif: libheif: Denial of Service and information disclosure via crafted HEIF file [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. The fix for CVE-2026-3949 (commit `b97c8b5`, PR #1712) introduced an integer overflow in the very security check it added. The check itself can be bypassed, allowing a crafted HEIF file with a VVC track to trigger the same out-of-bounds heap read that CVE-2026-3949 was meant to prevent. This is a separate, currently-unpatched vulnerability. Issue #1712 was closed as fixed without testing the edge cas
Bugzilla
CVE-2026-47251 libheif: libheif: Denial of Service and information disclosure via crafted HEIF file
bugzilla·2026-07-21·CVSS 3.3
CVE-2026-47251 [LOW] CVE-2026-47251 libheif: libheif: Denial of Service and information disclosure via crafted HEIF file
CVE-2026-47251 libheif: libheif: Denial of Service and information disclosure via crafted HEIF file
libheif is a HEIF and AVIF file format decoder and encoder. The fix for CVE-2026-3949 (commit `b97c8b5`, PR #1712) introduced an integer overflow in the very security check it added. The check itself can be bypassed, allowing a crafted HEIF file with a VVC track to trigger the same out-of-bounds heap read that CVE-2026-3949 was meant to prevent. This is a separate, currently-unpatched vulnerability. Issue #1712 was closed as fixed without testing the edge case where `size` is near `UINT32_MAX`. Version 1.22.0 patches the issue.
2026-07-21
Published