CVE-2026-3949

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Source
https://cve.org/CVERecord?id=CVE-2026-3949
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-3949.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-3949
Downstream
DEBIAN (1)
ECHO (1)
openSUSE (2)
SUSE (3)
UBUNTU (1)
Related
openSUSE (2)
SUSE (3)
Published
2026-03-11T18:32:09Z
Modified
2026-09-10T08:21:16Z
Severity
  • 1.9 (Low) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
Summary
strukturag libheif HEIF File decoder_vvdec.cc vvdec_push_data2 out-of-bounds
Details

A vulnerability was determined in strukturag libheif up to 1.21.2. This affects the function vvdec_push_data2 of the file libheif/plugins/decoder_vvdec.cc of the component HEIF File Parser. Executing a manipulation of the argument size can lead to out-of-bounds read. The attack needs to be launched locally. The exploit has been publicly disclosed and may be utilized. This patch is called b97c8b5f198b27f375127cd597a35f2113544d03. It is advisable to implement a patch to correct this issue.

Database specific 
{
    "cna_assigner":  "VulDB",
    "cwe_ids":  [
        "CWE-119",
        "CWE-125"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3949.json"
}
References

Affected packages

Git / github.com/strukturag/libheif

Affected ranges

Type
GIT
Repo
https://github.com/strukturag/libheif
Events
Introduced
81b09baa38ac8654d34d0f8b7780c44addfc7893
Fixed
b97c8b5f198b27f375127cd597a35f2113544d03
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "1.21.0"
        },
        {
            "last_affected":  "1.21.0"
        },
        {
            "introduced":  "1.21.1"
        },
        {
            "last_affected":  "1.21.1"
        },
        {
            "introduced":  "1.21.2"
        },
        {
            "last_affected":  "1.21.2"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

1.*
1.21.0
1.21.1
1.21.2
v1.*
v1.21.0
v1.21.1
v1.21.2

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-3949.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "241394016192530154728775493219794092134",
                "306070744995062561529607612816830400187",
                "222263289327577883699071857898995442826",
                "95113494202903003317628323001320890145",
                "306095758132309700395813887161949265853",
                "330046478980160121851119960901217415066",
                "291482973947041319417118209145053084229",
                "93434688375480901107547632780894131127"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-3949-35acf889",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/strukturag/libheif/commit/b97c8b5f198b27f375127cd597a35f2113544d03",
        "target":  {
            "file":  "libheif/plugins/decoder_vvdec.cc"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "125050619902725537773320484018886304502",
            "length":  549
        },
        "id":  "CVE-2026-3949-a4f33640",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/strukturag/libheif/commit/b97c8b5f198b27f375127cd597a35f2113544d03",
        "target":  {
            "file":  "libheif/plugins/decoder_vvdec.cc",
            "function":  "vvdec_push_data2"
        }
    }
]
vanir_signatures_modified 
"2026-09-10T08:21:16Z"