What is CVE-2022-4543?

CVE-2022-4543 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Information Exposure flaw (CWE-200). CVE-2022-4543 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-4543?

CVE-2022-4543 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Is there a patch available for CVE-2022-4543?

No patch is currently available for CVE-2022-4543. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2022-4543 actively exploited?

CVE-2022-4543 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Information Exposure (CWE-200)?

The product exposes sensitive information to an actor not authorised to see it. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/200.html

CVE-2022-4543

Medium

A flaw named "EntryBleed" was found in the Linux Kernel Page Table Isolation (KPTI). This issue could allow a local attacker to leak KASLR base via prefetch side-channels based on TLB timing for Intel systems.

Package Linux Kernel

Published 2023-01-11

Last modified 2025-04-08

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Vector string

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

Weakness type

CWE-200

CVE-2022-4543 is a Information Exposure vulnerability

What is Information Exposure?

The product exposes sensitive information to an actor not authorised to see it. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2022-4543 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Openwall
https://www.openwall.com/lists/oss-security/2022/12/16/3

Exploit Mailing List Third Party Advisory
Willsroot
https://www.willsroot.io/2022/12/entrybleed.html

Exploit Third Party Advisory

Details

CVE ID CVE-2022-4543

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2023-01-11

Modified 2025-04-08

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2022-4543?

CVE-2022-4543 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Information Exposure flaw (CWE-200) . CVE-2022-4543 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2022-4543?

CVE-2022-4543 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Is there a patch available for CVE-2022-4543?

No patch is currently available for CVE-2022-4543. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2022-4543 actively exploited?

No — CVE-2022-4543 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Information Exposure (CWE-200)?

The product exposes sensitive information to an actor not authorised to see it. View CWE-200 on MITRE CWE →