CVE-2019-20934

Source
https://cve.org/CVERecord?id=CVE-2019-20934
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-20934.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2019-20934
Downstream
Related
Published
2020-11-28T07:15:11.037Z
Modified
2026-02-21T07:30:40.507854Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H CVSS Calculator
Summary
[none]
Details

An issue was discovered in the Linux kernel before 5.2.6. On NUMA systems, the Linux fair scheduler has a use-after-free in shownumastats() because NUMA fault statistics are inappropriately freed, aka CID-16d51a590a8c.

References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
16d51a590a8ce3befb1308e0e7ab77f3b661af33
Introduced
84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d
Fixed
16d51a590a8ce3befb1308e0e7ab77f3b661af33

Affected versions

v4.*
v4.19
v4.20
v4.20-rc1
v4.20-rc2
v4.20-rc3
v4.20-rc4
v4.20-rc5
v4.20-rc6
v4.20-rc7
v5.*
v5.0
v5.0-rc1
v5.0-rc2
v5.0-rc3
v5.0-rc4
v5.0-rc5
v5.0-rc6
v5.0-rc7
v5.0-rc8
v5.1
v5.1-rc1
v5.1-rc2
v5.1-rc3
v5.1-rc4
v5.1-rc5
v5.1-rc6
v5.1-rc7
v5.2
v5.2-rc1
v5.2-rc2
v5.2-rc3
v5.2-rc4
v5.2-rc5
v5.2-rc6
v5.2-rc7
v5.3-rc1

Database specific

source
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-20934.json"
vanir_signatures
[
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git@16d51a590a8ce3befb1308e0e7ab77f3b661af33",
        "signature_type": "Line",
        "digest": {
            "line_hashes": [
                "63395818398897413909557900250969865934",
                "207798666477887472315691857715859745054",
                "185010114745374102929478092651379466775",
                "305274084091123883321763694196058633285"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "target": {
            "file": "kernel/fork.c"
        },
        "id": "CVE-2019-20934-07735d42",
        "signature_version": "v1"
    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git@16d51a590a8ce3befb1308e0e7ab77f3b661af33",
        "signature_type": "Line",
        "digest": {
            "line_hashes": [
                "252617591761574244149129376872074095801",
                "37700983142984960188089919518024936285",
                "330173180371048314074981127503304208346",
                "65819421231532245838543266444409292582"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "target": {
            "file": "fs/exec.c"
        },
        "id": "CVE-2019-20934-1e21560c",
        "signature_version": "v1"
    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git@16d51a590a8ce3befb1308e0e7ab77f3b661af33",
        "signature_type": "Line",
        "digest": {
            "line_hashes": [
                "8816632915573061150874174987960410955",
                "22453205153366519410104859403842819026",
                "32164951233401989119116486469498344791",
                "304711779815884555260880251872954859242",
                "190795142035019735231322503537811942751",
                "202588330512788619836877582292161732955",
                "123803341449853750961786876118675516953",
                "51325695724978096938080399366081456333"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "target": {
            "file": "include/linux/sched/numa_balancing.h"
        },
        "id": "CVE-2019-20934-44bd7ca4",
        "signature_version": "v1"
    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git@16d51a590a8ce3befb1308e0e7ab77f3b661af33",
        "signature_type": "Function",
        "digest": {
            "function_hash": "91118405756878055613247323848157383817",
            "length": 514.0
        },
        "deprecated": false,
        "target": {
            "file": "kernel/sched/fair.c",
            "function": "task_numa_free"
        },
        "id": "CVE-2019-20934-a3a42c11",
        "signature_version": "v1"
    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git@16d51a590a8ce3befb1308e0e7ab77f3b661af33",
        "signature_type": "Function",
        "digest": {
            "function_hash": "185782961047231174215716039841139263788",
            "length": 335.0
        },
        "deprecated": false,
        "target": {
            "file": "kernel/fork.c",
            "function": "__put_task_struct"
        },
        "id": "CVE-2019-20934-a5636771",
        "signature_version": "v1"
    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git@16d51a590a8ce3befb1308e0e7ab77f3b661af33",
        "signature_type": "Function",
        "digest": {
            "function_hash": "310409503201323282317111800584588363513",
            "length": 2445.0
        },
        "deprecated": false,
        "target": {
            "file": "fs/exec.c",
            "function": "__do_execve_file"
        },
        "id": "CVE-2019-20934-b13b1320",
        "signature_version": "v1"
    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git@16d51a590a8ce3befb1308e0e7ab77f3b661af33",
        "signature_type": "Line",
        "digest": {
            "line_hashes": [
                "199800507107019512146963549626163445034",
                "186682496904552234716842408702550910422",
                "207062626830394100941715482412802834277",
                "138356823179186133093711501356658034817",
                "230982764417011782302227397843361130941",
                "243867022572981704388013215165343505860",
                "293754351848944618092893415497761113413",
                "94202202038672674457507761204360320852",
                "65433408453770905206421033085397400902",
                "60085358486625068462232977232024871847",
                "117196876457835565419794379157503411452",
                "61406138699656289094814727337756643325",
                "208503837172035954315495679087077513602",
                "103125050546656110941035326256031780614"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "target": {
            "file": "kernel/sched/fair.c"
        },
        "id": "CVE-2019-20934-efec5f35",
        "signature_version": "v1"
    }
]