CVE-2026-32882

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Source
https://cve.org/CVERecord?id=CVE-2026-32882
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-32882.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-32882
Aliases
  • GHSA-hg7q-rjr2-8x46
Downstream
Related
Published
2026-05-19T20:07:21Z
Modified
2026-08-12T15:32:28Z
Severity
  • 7.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H CVSS Calculator
Summary
libheif: Heap Buffer OOB Read in overlay compositing due to wrong alpha stride
Details

libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.21.2 and prior contain a heap buffer over-read in HeifPixelImage::overlay() in libheif/pixelimage.cc. When compositing an overlay image (iovl) whose child image has a different bit depth for the alpha channel than for the color channels, the function indexes into the alpha plane using the color channel stride (in_stride) instead of the previously retrieved alpha_stride, causing reads past the end of the alpha buffer (up to 3,123 bytes for a 100×50 image with 10-bit color and 8-bit alpha). A crafted HEIF file can exploit this to cause a denial of service (crash) or potentially disclose adjacent heap memory through leaked bytes embedded in the decoded output pixels. This issue has been fixed in versionThis issue has been fixed in version 1.22.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32882.json"
}
References

Affected packages

Git / github.com/strukturag/libheif

Affected ranges

Type
GIT
Repo
https://github.com/strukturag/libheif
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
0c81a846b7401dbdb7118afd0761057f21e43511
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.22.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v1.*
v1.1.0
v1.10.0
v1.11.0
v1.12.0
v1.13.0
v1.14.0
v1.14.1
v1.14.2
v1.15.0
v1.15.1
v1.15.2
v1.16.0
v1.16.1
v1.16.2
v1.17.0
v1.17.1
v1.17.2
v1.17.3
v1.17.4
v1.17.5
v1.17.6
v1.18.0
v1.18.0-rc1
v1.19.0
v1.19.1
v1.19.2
v1.19.3
v1.19.4
v1.19.5
v1.2.0
v1.20.0
v1.20.1
v1.21.0
v1.21.1
v1.21.2
v1.3.0
v1.3.1
v1.3.2
v1.7.0
v1.8.0
v1.9.0
v1.9.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-32882.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "175107675317900759648359576881034358256",
                "220432159010798240840908416937024023837",
                "268268967745545109707798594937166387611",
                "253707932335489477155115861206639265538",
                "199679408075604976163979654915891773303",
                "175107675317900759648359576881034358256",
                "220432159010798240840908416937024023837",
                "268268967745545109707798594937166387611",
                "286778284410146987248233194002847271266",
                "178248309108630471590778685235254536836"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-32882-91619f1d",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/strukturag/libheif/commit/0c81a846b7401dbdb7118afd0761057f21e43511",
        "target": {
            "file": "tests/uncompressed_box.cc"
        }
    }
]
vanir_signatures_modified 
"2026-08-12T15:32:28Z"