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Debian Security Bug TrackerDEBIANCVE:CVE-2020-36387

HistoryJun 07, 2021 - 8:15 p.m.

CVE-2020-36387

2021-06-0720:15:08

Debian Security Bug Tracker

security-tracker.debian.org

linux

kernel

security vulnerability

use after free

cid-6d816e088c35

io_async_task_func

ctx reference.

CVSS2

7.2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

Percentile

14.2%

JSON

An issue was discovered in the Linux kernel before 5.8.2. fs/io_uring.c has a use-after-free related to io_async_task_func and ctx reference holding, aka CID-6d816e088c35.

OSVersionArchitecturePackageVersionFilename
Debian12alllinux< 5.7.17-1linux_5.7.17-1_all.deb
Debian11alllinux< 5.7.17-1linux_5.7.17-1_all.deb
Debian999alllinux< 5.7.17-1linux_5.7.17-1_all.deb
Debian13alllinux< 5.7.17-1linux_5.7.17-1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	12	all	linux	< 5.7.17-1	linux_5.7.17-1_all.deb
Debian	11	all	linux	< 5.7.17-1	linux_5.7.17-1_all.deb
Debian	999	all	linux	< 5.7.17-1	linux_5.7.17-1_all.deb
Debian	13	all	linux	< 5.7.17-1	linux_5.7.17-1_all.deb

CVSS2

7.2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

Percentile

14.2%

JSON

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