PUB-A-215387420

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Import Source

https://storage.googleapis.com/android-osv/PUB-A-215387420.json

JSON Data

https://api.osv.dev/v1/vulns/PUB-A-215387420

Aliases

A-215387420
CVE-2021-39806

Published

2022-06-01T00:00:00Z

Modified

2026-05-14T17:07:02.674203Z

Summary

[none]

Details

In closef of labelbackendsandroid.c, there is a possible way to corrupt memory due to a double free. This could lead to local escalation of privilege during startup of servicemanager, if an attacker can trigger an initialization failure, with no additional execution privileges needed. User interaction is not needed for exploitation.

References

https://source.android.com/security/bulletin/2022-06-01

Affected packages

Android / platform/external/selinux

Package

Name: platform/external/selinux

Affected ranges

Type: ECOSYSTEM
Events: Introduced

12L-next:0

Fixed

12L-next:2022-06-01

Affected versions

Other

12L-next

Ecosystem specific

{
    "types": [
        "EoP"
    ],
    "fixes": [
        "https://android.googlesource.com/platform/external/selinux/+/98fa1b865d52d97c06b754d1c2cfb69315997b65"
    ],
    "spl": "2022-06-01",
    "vanir_signatures": [
        {
            "id": "PUB-A-215387420-63757973",
            "deprecated": false,
            "signature_type": "Line",
            "match_only_versions": [
                "12L-next"
            ],
            "signature_version": "v1",
            "source": "https://android.googlesource.com/platform/external/selinux/+/98fa1b865d52d97c06b754d1c2cfb69315997b65",
            "target": {
                "file": "libselinux/src/label_backends_android.c"
            },
            "digest": {
                "threshold": 0.9,
                "line_hashes": [
                    "147964945417207699165835323731164294777",
                    "188581824255746068532163302509815792704",
                    "13414737792697373489248572050824066582"
                ]
            }
        },
        {
            "id": "PUB-A-215387420-d0ab893d",
            "deprecated": false,
            "signature_type": "Function",
            "match_only_versions": [
                "12L-next"
            ],
            "signature_version": "v1",
            "source": "https://android.googlesource.com/platform/external/selinux/+/98fa1b865d52d97c06b754d1c2cfb69315997b65",
            "target": {
                "function": "closef",
                "file": "libselinux/src/label_backends_android.c"
            },
            "digest": {
                "function_hash": "334210609469257421118557946681882990922",
                "length": 387.0
            }
        }
    ],
    "severity": "Moderate"
}

Database specific

source

"https://storage.googleapis.com/android-osv/PUB-A-215387420.json"