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ubuntuUbuntuUSN-4710-1
HistoryFeb 03, 2021 - 12:00 a.m.

Linux kernel vulnerability

2021-02-0300:00:00
ubuntu.com
266
linux kernel
memory deallocation
ubuntu 18.04
ubuntu 16.04
denial of service
perf subsystem

CVSS2

4.9

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

6.3

Confidence

High

EPSS

0

Percentile

5.1%

JSON

Releases

  • Ubuntu 18.04 ESM
  • Ubuntu 16.04 ESM

Packages

  • linux - Linux kernel
  • linux-hwe - Linux hardware enablement (HWE) kernel

Details

Kiyin (尹亮) discovered that the perf subsystem in the Linux kernel did
not properly deallocate memory in some situations. A privileged attacker
could use this to cause a denial of service (kernel memory exhaustion).

OSVersionArchitecturePackageVersionFilename
Ubuntu18.04noarchlinux-image-4.15.0-135-generic< 4.15.0-135.139UNKNOWN
Ubuntu18.04noarchkernel-signed-image-4.15.0-135-generic-di< 4.15.0-135.139UNKNOWN
Ubuntu18.04noarchlinux-image-4.15.0-135-generic-dbgsym< 4.15.0-135.139UNKNOWN
Ubuntu18.04noarchlinux-image-4.15.0-135-lowlatency< 4.15.0-135.139UNKNOWN
Ubuntu18.04noarchlinux-image-4.15.0-135-lowlatency-dbgsym< 4.15.0-135.139UNKNOWN
Ubuntu18.04noarchlinux-image-4.15.0-135-generic-lpae< 4.15.0-135.139UNKNOWN
Ubuntu18.04noarchblock-modules-4.15.0-135-generic-di< 4.15.0-135.139UNKNOWN
Ubuntu18.04noarchcrypto-modules-4.15.0-135-generic-di< 4.15.0-135.139UNKNOWN
Ubuntu18.04noarchfat-modules-4.15.0-135-generic-di< 4.15.0-135.139UNKNOWN
Ubuntu18.04noarchfb-modules-4.15.0-135-generic-di< 4.15.0-135.139UNKNOWN
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CVSS2

4.9

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

6.3

Confidence

High

EPSS

0

Percentile

5.1%

JSON
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