CVE-2020-29367

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Source
https://cve.org/CVERecord?id=CVE-2020-29367
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-29367.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2020-29367
Aliases
Downstream
Related
Published
2020-11-27T20:15:11.090Z
Modified
2026-04-16T00:02:19.126214324Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

blosc2.c in Blosc C-Blosc2 through 2.0.0.beta.5 has a heap-based buffer overflow when there is a lack of space to write compressed data.

Database specific 
{
    "unresolved_ranges": [
        {
            "cpe": "cpe:2.3:a:blosc:c-blosc2:2.0.0:alpha2:*:*:*:*:*:*",
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "2.0.0-alpha2"
                }
            ]
        },
        {
            "cpe": "cpe:2.3:a:blosc:c-blosc2:2.0.0:alpha3:*:*:*:*:*:*",
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "2.0.0-alpha3"
                }
            ]
        },
        {
            "cpe": "cpe:2.3:a:blosc:c-blosc2:2.0.0:alpha4:*:*:*:*:*:*",
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "2.0.0-alpha4"
                }
            ]
        },
        {
            "cpe": "cpe:2.3:a:blosc:c-blosc2:2.0.0:alpha5:*:*:*:*:*:*",
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "2.0.0-alpha5"
                }
            ]
        },
        {
            "cpe": "cpe:2.3:a:blosc:c-blosc2:2.0.0:beta1:*:*:*:*:*:*",
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "2.0.0-beta1"
                }
            ]
        },
        {
            "cpe": "cpe:2.3:a:blosc:c-blosc2:2.0.0:beta2:*:*:*:*:*:*",
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "2.0.0-beta2"
                }
            ]
        },
        {
            "cpe": "cpe:2.3:a:blosc:c-blosc2:2.0.0:beta3:*:*:*:*:*:*",
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "2.0.0-beta3"
                }
            ]
        },
        {
            "cpe": "cpe:2.3:a:blosc:c-blosc2:2.0.0:beta4:*:*:*:*:*:*",
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "2.0.0-beta4"
                }
            ]
        },
        {
            "cpe": "cpe:2.3:a:blosc:c-blosc2:2.0.0:beta5:*:*:*:*:*:*",
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "2.0.0-beta5"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/blosc/c-blosc2

Affected ranges

Type
GIT
Repo
https://github.com/blosc/c-blosc2
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
e54acfbab77381f708b86e6a3e9748b8a4f8c3a2
Fixed
c4c6470e88210afc95262c8b9fcc27e30ca043ee
Database specific 
{
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "C-Blosc2"
        },
        {
            "fixed": "2.0.0.beta.5"
        }
    ]
}

Affected versions

v2.*
v2.0.0-beta.1
v2.0.0-beta.3
v2.0.0-beta.4
v2.0.0.beta.5
v2.0.0a2
v2.0.0a3
v2.0.0a4
v2.0.0a5

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-29367.json"
vanir_signatures_modified 
"2026-04-11T23:13:31Z"
vanir_signatures 
[
    {
        "deprecated": false,
        "signature_type": "Function",
        "digest": {
            "function_hash": "326153899096615029256325386252686542973",
            "length": 3847.0
        },
        "target": {
            "file": "blosc/blosc2.c",
            "function": "blosc_c"
        },
        "source": "https://github.com/blosc/c-blosc2/commit/c4c6470e88210afc95262c8b9fcc27e30ca043ee",
        "signature_version": "v1",
        "id": "CVE-2020-29367-1f559629"
    },
    {
        "deprecated": false,
        "signature_type": "Line",
        "digest": {
            "line_hashes": [
                "115160810050303563653184790471528932896",
                "239296388202758034129650212160054754506",
                "50187354779896057040248664005612369730",
                "251337963973582722261357795021896307833",
                "74361010105737414546412765371361526619",
                "156676445413465072441604645621974351356",
                "149714139667958978525157298586363627946",
                "19652566344025132376417241588039366240",
                "104629731683891981441487440116730921923",
                "266060646114329049041177282908682509460",
                "22805370599161042853440829602295935062",
                "100671487083616586379641719952851503449",
                "40764622336818957941615300820142616622",
                "199553255100920226857313246531077628494",
                "117078553732038890853034363884693520893",
                "240515191932395467941636730869243545373",
                "210805881206021799918695359593744395845"
            ],
            "threshold": 0.9
        },
        "target": {
            "file": "blosc/blosc2.c"
        },
        "source": "https://github.com/blosc/c-blosc2/commit/c4c6470e88210afc95262c8b9fcc27e30ca043ee",
        "signature_version": "v1",
        "id": "CVE-2020-29367-523d5c56"
    }
]