ASB-A-204573007

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Import Source
https://storage.googleapis.com/android-osv/ASB-A-204573007.json
JSON Data
https://api.osv.dev/v1/vulns/ASB-A-204573007
Aliases
Published
2021-11-01T00:00:00Z
Modified
2025-12-05T16:53:35.052764Z
Summary
[none]
Details

In eploopcheck_proc of eventpoll.c, there is a possible way to corrupt memory due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

References

Affected packages

Android / :linux_kernel:

Package

Name
:linux_kernel:

Affected ranges

Type
ECOSYSTEM
Events
Introduced
:0
Fixed
:2021-11-06

Affected versions

Other

Kernel

Ecosystem specific 

{
    "spl": "2021-11-06",
    "fixes": [
        "https://android.googlesource.com/kernel/common/+/77f4689de17c0887775bb77896f4cc11a39bf848"
    ],
    "severity": "High",
    "types": [
        "EoP"
    ],
    "vanir_signatures": [
        {
            "target": {
                "file": "fs/eventpoll.c"
            },
            "digest": {
                "line_hashes": [
                    "87738847746414484461941344870068227438",
                    "214976600644941457966157392288138396784",
                    "219994842081940744527435928281342041982",
                    "251510000383263481098954132756262779292",
                    "68236877813091864302708093933915698115",
                    "13233711005510888625002106547747501452"
                ],
                "threshold": 0.9
            },
            "signature_version": "v1",
            "source": "https://android.googlesource.com/kernel/common/+/77f4689de17c0887775bb77896f4cc11a39bf848",
            "deprecated": false,
            "signature_type": "Line",
            "id": "ASB-A-204573007-2fe8de59"
        },
        {
            "target": {
                "function": "ep_loop_check_proc",
                "file": "fs/eventpoll.c"
            },
            "digest": {
                "length": 875.0,
                "function_hash": "333290089620669436895702994728217173095"
            },
            "signature_version": "v1",
            "source": "https://android.googlesource.com/kernel/common/+/77f4689de17c0887775bb77896f4cc11a39bf848",
            "deprecated": false,
            "signature_type": "Function",
            "id": "ASB-A-204573007-63ba0478"
        }
    ]
}