CVE-2022-28805

singlevar in lparser.c in Lua from (including) 5.4.0 up to (excluding) 5.4.4 lacks a certain luaK_exp2anyregup call, leading to a heap-based buffer over-read that might affect a system that compiles untrusted Lua code.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/28xxx/CVE-2022-28805.json",
    "cna_assigner": "mitre"
}

References

Affected packages

Git / github.com/lua/lua

Affected ranges

Type

GIT

Repo

https://github.com/lua/lua

Events

Introduced

c33b1728aeb7dfeec4013562660e07d32697aa6b

Fixed

e15f1f2bb7a38a3c94519294d031e48508d65006

Fixed

1f3c6f4534c6411313361697d98d1145a1f030fa

Database specific

{
    "cpe": "cpe:2.3:a:lua:lua:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "5.4.0"
        },
        {
            "fixed": "5.4.5"
        }
    ],
    "source": [
        "CPE_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v5.*

v5.4.0

v5.4.1

v5.4.2

v5.4.3

v5.4.4

Database specific

vanir_signatures_modified

"2026-05-01T10:35:41Z"

vanir_signatures

[
    {
        "signature_version": "v1",
        "digest": {
            "function_hash": "53201180014080356134198209586064207783",
            "length": 347.0
        },
        "id": "CVE-2022-28805-6dde851f",
        "signature_type": "Function",
        "target": {
            "file": "lparser.c",
            "function": "singlevar"
        },
        "source": "https://github.com/lua/lua/commit/1f3c6f4534c6411313361697d98d1145a1f030fa",
        "deprecated": false
    },
    {
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "32201794497045802336489965260675966661",
                "222355253276990523824162340041015369710",
                "28722556712081149350779902624787499513",
                "154526588328123496999063531195759804808"
            ]
        },
        "id": "CVE-2022-28805-a5c78703",
        "signature_type": "Line",
        "target": {
            "file": "lparser.c"
        },
        "source": "https://github.com/lua/lua/commit/1f3c6f4534c6411313361697d98d1145a1f030fa",
        "deprecated": false
    }
]

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-28805.json"