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ubuntuUbuntuUSN-6205-1
HistoryJul 06, 2023 - 12:00 a.m.

Linux kernel (GKE) vulnerabilities

2023-07-0600:00:00
ubuntu.com
26
ubuntu 20.04 lts
gke
linux kernel
vulnerabilities
out-of-bounds write
denial of service
arbitrary code
invlpg instruction
intel processors
tlb entries
pcids
kernel memory

7.8 High

CVSS3

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

8.4 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

19.1%

Releases

  • Ubuntu 20.04 LTS

Packages

  • linux-gke - Linux kernel for Google Container Engine (GKE) systems

Details

Hangyu Hua discovered that the Flower classifier implementation in the
Linux kernel contained an out-of-bounds write vulnerability. An attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2023-35788, LP: #2023577)

It was discovered that for some Intel processors the INVLPG instruction
implementation did not properly flush global TLB entries when PCIDs are
enabled. An attacker could use this to expose sensitive information
(kernel memory) or possibly cause undesired behaviors. (LP: #2023220)

7.8 High

CVSS3

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

8.4 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

19.1%