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

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

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

Show details

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

Affected versions

v5.*

v5.4.0

v5.4.1

v5.4.2

v5.4.3

v5.4.4

Database specific

source

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

vanir_signatures

[
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "53201180014080356134198209586064207783",
            "length":  347
        },
        "id":  "CVE-2022-28805-6dde851f",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/lua/lua/commit/1f3c6f4534c6411313361697d98d1145a1f030fa",
        "target":  {
            "file":  "lparser.c",
            "function":  "singlevar"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "32201794497045802336489965260675966661",
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                "154526588328123496999063531195759804808"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2022-28805-a5c78703",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/lua/lua/commit/1f3c6f4534c6411313361697d98d1145a1f030fa",
        "target":  {
            "file":  "lparser.c"
        }
    }
]

vanir_signatures_modified

"2026-08-18T14:46:30Z"