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No exploitation reportedFix available

CVE-2025-68431

No exploitation reported by the sources we read.

  • Published2025-12-29
  • Fixed in1.21.0
  • WeaknessCWE-125 · CWE-190

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

libheif is an HEIF and AVIF file format decoder and encoder. Prior to version 1.21.0, a crafted HEIF that exercises the overlay image item path triggers a heap buffer over-read in `HeifPixelImage::overlay()`. The function computes a negative row length (likely from an unclipped overlay rectangle or invalid offsets), which then underflows when converted to `size_t` and is passed to `memcpy`, causing a very large read past the end of the source plane and a crash. Version 1.21.0 contains a patch. As a workaround, avoid decoding images using `iovl` overlay boxes.

Timeline

dates in UTC
  1. 2025-12-2919:15CVE publishedNVD

Versions per branch

NVD
Struktur libheif
BranchAffectedFixed in
1.21< 1.21.01.21.0

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • strukturag libheif
    Affected
    • = < 1.21.0no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2025-12-29

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libheifUbuntu:Pro:22.04:LTSall versions · fixed in 1.12.0-2ubuntu0.1~esm2
  • libheifUbuntu:Pro:20.04:LTSall versions · fixed in 1.6.1-1ubuntu0.1~esm2
  • libheifUbuntu:Pro:18.04:LTSall versions · fixed in 1.1.0-2ubuntu0.1~esm2
  • libheifUbuntu:26.04:LTSall versions · fixed in 1.21.2-1
  • libheifUbuntu:25.10all versions · fixed in 1.20.2-1ubuntu0.1
  • libheifUbuntu:24.04:LTSall versions · fixed in 1.17.6-1ubuntu4.2
  • libheifSUSE:Linux Enterprise Server for SAP applications 16.0all versions · fixed in 1.19.7-160000.3.1
  • libheifSUSE:Linux Enterprise Server for SAP applications 16.0all versions · fixed in 1.23.0-160000.1.1

35 more package ranges on OSV.dev

Vendor advisories

  • CVE-2025-68431 Red Hat Product Security

    libheif: libheif has Potential Heap Buffer Over-Read

Full record on NVD

Fix

  1. Update Struktur libheif to 1.21.0

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionnone2025-12-30
  • CNACVSS 3.16.5known since 2026-10-23
  • NVDCVSS 3.17.1read 2026-10-23
  • CNAweakness (CWE)CWE-125, CWE-190known since 2026-10-23
  • FIRST EPSSEPSS score0.4 %2026-11-09
  • OSVaffected packages—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Published
2025-12-29
Last Modified
2026-10-07
NVD status
Analyzed

Frequently asked questions

What is CVE-2025-68431?

libheif is an HEIF and AVIF file format decoder and encoder. Prior to version 1.21.0, a crafted HEIF that exercises the overlay image item path triggers a heap buffer over-read in `HeifPixelImage::overlay()`. The function computes a negative row length (likely from an unclipped overlay rectangle or invalid offsets), which then underflows when converted to `size_t` and is passed to `memcpy`, causing a very large read past the end of the source plane and a crash. Version 1.21.0 contains a patch. As a workaround, avoid decoding images using `iovl` overlay boxes.

Is CVE-2025-68431 actively exploited?

Active exploitation of CVE-2025-68431 has not been confirmed. Its EPSS score was 0.4% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-68431?

CVE-2025-68431 has a CVSS v3 base score of 7.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H.

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