FKIE_CVE-2025-68431

Vulnerability from fkie_nvd - Published: 2025-12-29 19:15 - Updated: 2026-02-25 14:53
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
7.1 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Summary
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.
References
security-advisories@github.comhttps://github.com/strukturag/libheif/commit/b8c12a7b70f46c9516711a988483bed377b78d46Patch
security-advisories@github.comhttps://github.com/strukturag/libheif/releases/tag/v1.21.0Product, Release Notes
security-advisories@github.comhttps://github.com/strukturag/libheif/security/advisories/GHSA-j87x-4gmq-cqfqExploit, Patch, Vendor Advisory
Impacted products
Vendor Product Version
struktur libheif *
To clipboard 

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              "matchCriteriaId": "BBD4D6C6-A38E-4C2C-AB9D-F82441BE2D4F",
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  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2025-68431",
  "lastModified": "2026-02-25T14:53:34.747",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "type": "Secondary"
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          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
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  "published": "2025-12-29T19:15:56.933",
  "references": [
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      "tags": [
        "Patch"
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      "url": "https://github.com/strukturag/libheif/commit/b8c12a7b70f46c9516711a988483bed377b78d46"
    },
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      "source": "security-advisories@github.com",
      "tags": [
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      "url": "https://github.com/strukturag/libheif/releases/tag/v1.21.0"
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      "tags": [
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-125"
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          "lang": "en",
          "value": "CWE-190"
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      "source": "security-advisories@github.com",
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}


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