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CVE-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 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`.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:913a860c7602e390a1c67a0f0566630e10c517a8ed03b1c4ee6015094e006e5f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-190","description":"CWE-190: Integer Overflow or Wraparound","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f732173ce8c2d6bf6070abd861119515cbbe074f8ea37ae9c539973b0dbc04fa · sha256:d2505bbdfe274fa3… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f732173ce8c2d6bf6070abd861119515cbbe074f8ea37ae9c539973b0dbc04fa · sha256:d2505bbdfe274fa3… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"libheif","vendor":"strukturag","versions":[{"status":"affected","version":"< 1.22.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f732173ce8c2d6bf6070abd861119515cbbe074f8ea37ae9c539973b0dbc04fa · sha256:d2505bbdfe274fa3… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":6.8,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f732173ce8c2d6bf6070abd861119515cbbe074f8ea37ae9c539973b0dbc04fa · sha256:d2505bbdfe274fa3… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-190","description":"CWE-190: Integer Overflow or Wraparound","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f732173ce8c2d6bf6070abd861119515cbbe074f8ea37ae9c539973b0dbc04fa · sha256:d2505bbdfe274fa3… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f732173ce8c2d6bf6070abd861119515cbbe074f8ea37ae9c539973b0dbc04fa · sha256:d2505bbdfe274fa3… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/strukturag/libheif/issues/1712","tags":["x_refsource_MISC"],"url":"https://github.com/strukturag/libheif/issues/1712"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f732173ce8c2d6bf6070abd861119515cbbe074f8ea37ae9c539973b0dbc04fa · sha256:d2505bbdfe274fa3… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/strukturag/libheif/issues/1712"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f732173ce8c2d6bf6070abd861119515cbbe074f8ea37ae9c539973b0dbc04fa · sha256:d2505bbdfe274fa3… · /containers/adp/0/references/1
{"tags":["exploit"],"url":"https://github.com/strukturag/libheif/security/advisories/GHSA-p6q9-fhf2-vj9v"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f732173ce8c2d6bf6070abd861119515cbbe074f8ea37ae9c539973b0dbc04fa · sha256:d2505bbdfe274fa3… · /containers/adp/0/references/0
{"name":"https://github.com/strukturag/libheif/security/advisories/GHSA-p6q9-fhf2-vj9v","tags":["x_refsource_CONFIRM"],"url":"https://github.com/strukturag/libheif/security/advisories/GHSA-p6q9-fhf2-vj9v"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f732173ce8c2d6bf6070abd861119515cbbe074f8ea37ae9c539973b0dbc04fa · sha256:d2505bbdfe274fa3… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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