ASB-A-147802478

See a problem?
Import Source
https://storage.googleapis.com/android-osv/ASB-A-147802478.json
JSON Data
https://api.osv.dev/v1/vulns/ASB-A-147802478
Aliases
Published
2020-12-01T00:00:00Z
Modified
2025-10-24T15:26:23.750784Z
Summary
[none]
Details

In doepollctl and eploopcheck_proc of eventpoll.c, there is a possible use after free due to a logic error. 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
:2020-12-05

Affected versions

Other

Kernel

Ecosystem specific 

{
    "fixes": [
        "https://android.googlesource.com/kernel/common/+/52c479697c9b",
        "https://android.googlesource.com/kernel/common/+/a9ed4a6560b8"
    ],
    "severity": "High",
    "types": [
        "EoP"
    ],
    "vanir_signatures": [
        {
            "signature_version": "v1",
            "digest": {
                "line_hashes": [
                    "5546302996892674695733181081150190713",
                    "254845254488049433364925925329909631002",
                    "61111867128246008456282430160655614650",
                    "287477108854287806242547243331052839356",
                    "68236877813091864302708093933915698115",
                    "241701986920677964397555727463466709105",
                    "277080834881712031923981486806664647673",
                    "158824667307289245702507900316174347151",
                    "7079986297794278244640125217904423066",
                    "333313324903879629285535110877405531974",
                    "75751489068667955072051408444324484418",
                    "138995473984137896688517210729817981360",
                    "178406555186694324031589384626827039474",
                    "180244627870399677721222713516771792152",
                    "38313024542004397305181903134150602153",
                    "291604657342661748843223099276439875606",
                    "257038468580260341064543362812162197302",
                    "258680882647267136425551000568036250174",
                    "82728358833382096016259715752225092144",
                    "200102018146994184616351414251937779109"
                ],
                "threshold": 0.9
            },
            "deprecated": false,
            "signature_type": "Line",
            "target": {
                "file": "fs/eventpoll.c"
            },
            "source": "https://android.googlesource.com/kernel/common/+/a9ed4a6560b8",
            "id": "ASB-A-147802478-2f8a7413"
        },
        {
            "signature_version": "v1",
            "digest": {
                "function_hash": "339019174826606143645427579203886136719",
                "length": 241.0
            },
            "deprecated": false,
            "signature_type": "Function",
            "target": {
                "function": "clear_tfile_check_list",
                "file": "fs/eventpoll.c"
            },
            "source": "https://android.googlesource.com/kernel/common/+/a9ed4a6560b8",
            "id": "ASB-A-147802478-36ff48c6"
        },
        {
            "signature_version": "v1",
            "digest": {
                "function_hash": "287259407574339437852013043003131772390",
                "length": 839.0
            },
            "deprecated": false,
            "signature_type": "Function",
            "target": {
                "function": "ep_loop_check_proc",
                "file": "fs/eventpoll.c"
            },
            "source": "https://android.googlesource.com/kernel/common/+/a9ed4a6560b8",
            "id": "ASB-A-147802478-82fec563"
        },
        {
            "signature_version": "v1",
            "digest": {
                "function_hash": "52056042117655767104639557800881983778",
                "length": 2447.0
            },
            "deprecated": false,
            "signature_type": "Function",
            "target": {
                "function": "do_epoll_ctl",
                "file": "fs/eventpoll.c"
            },
            "source": "https://android.googlesource.com/kernel/common/+/a9ed4a6560b8",
            "id": "ASB-A-147802478-d5c667f7"
        }
    ],
    "spl": "2020-12-05"
}