Is CVE-2024-43420 in the CISA KEV catalog?

No. CVE-2024-43420 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-43420?

CVE-2024-43420 has a CVSS v3 base score of 5.6 (MEDIUM).

What is the EPSS score for CVE-2024-43420?

CVE-2024-43420 has an EPSS score of 0.15% (4th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-43420?

Upgrade intel-microcode on debian 11 to 3.20250512.1~deb11u1 or later. Fixes are available for 6 affected products.

CVE & CISA-KEV Catalog

CVE-2024-43420

MEDIUM

5.6

CVSS v3

NVD

Description

Exposure of sensitive information caused by shared microarchitectural predictor state that influences transient execution for some Intel Atom(R) processors may allow an authenticated user to potentially enable information disclosure via local access.

How to fix

Remediation Available

intel-microcodeDebian

Fixed in:3.20250512.1~deb11u1CVE-2024-43420

Fixed in:3.20250512.1~deb12u1CVE-2024-43420

Fixed in:3.20250512.1CVE-2024-43420

microcode_ctlRed Hat / RHEL

Fixed in:2:2.1-73.24.el7_9RHSA-2025:10108

Fixed in:2:2.1-53.26.el7_7.1RHSA-2025:10111

Fixed in:2:2.1-73.24.el7_9RHSA-2025:10108

Fixed in:4:20220207-1.20250512.1.el8_6RHSA-2025:10109

Fixed in:4:20250512-1.el8_10RHSA-2025:10991

Fixed in:4:20191115-4.20250512.1.el8_2RHSA-2025:10126

Fixed in:4:20210216-1.20250512.1.el8_4RHSA-2025:10107

Fixed in:4:20220207-1.20250512.1.el8_6RHSA-2025:10109

Fixed in:4:20220809-2.20250512.1.el8_8RHSA-2025:10162

Fixed in:4:20191115-4.20250512.1.el8_2RHSA-2025:10126

Fixed in:4:20220809-2.20250512.1.el9_2RHSA-2025:10102

Fixed in:4:20230808-2.20250512.1.el9_4RHSA-2025:10101

Fixed in:4:20250211-1.20250512.1.el9_6RHBA-2025:9433

Fixed in:4:20220207-1.20250512.1.el9_0RHSA-2025:10103

Fixed in:4:20220809-2.20250512.1.el9_2RHSA-2025:10102

microcode_ctlRocky

Fixed in:2:2.1-53.26.el7_7.1RHSA-2025:10111

Fixed in:2:2.1-73.24.el7_9RHSA-2025:10108

Fixed in:4:20191115-4.20250512.1.el8_2RHSA-2025:10126

Fixed in:4:20250512-1.el8_10RHSA-2025:10991

Fixed in:4:20210216-1.20250512.1.el8_4RHSA-2025:10107

Fixed in:4:20220207-1.20250512.1.el8_6RHSA-2025:10109

Fixed in:4:20220809-2.20250512.1.el8_8RHSA-2025:10162

Fixed in:4:20191115-4.20250512.1.el8_2RHSA-2025:10126

Fixed in:4:20230808-2.20250512.1.el9_4RHSA-2025:10101

Fixed in:4:20250211-1.20250512.1.el9_6RHBA-2025:9433

Fixed in:4:20220207-1.20250512.1.el9_0RHSA-2025:10103

Fixed in:4:20220809-2.20250512.1.el9_2RHSA-2025:10102

microcode_ctl-debuginfoRocky

Fixed in:2:2.1-53.26.el7_7.1RHSA-2025:10111

Fixed in:2:2.1-73.24.el7_9RHSA-2025:10108

microcode_ctl-debuginfoRed Hat / RHEL

Fixed in:2:2.1-73.24.el7_9RHSA-2025:10108

Fixed in:2:2.1-53.26.el7_7.1RHSA-2025:10111

intel-microcodeUbuntu

Fixed in:3.20250512.0ubuntu0.16.04.1+esm1USN-7535-1

Fixed in:3.20250512.0ubuntu0.18.04.1+esm1USN-7535-1

Fixed in:3.20250512.0ubuntu0.20.04.1USN-7535-1

Fixed in:3.20250512.0ubuntu0.22.04.1USN-7535-1

Fixed in:3.20250512.0ubuntu0.24.04.1USN-7535-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.15%probability of exploitation in 30 days

4thpercentile

Low risk: more likely to be exploited than 4% of all known CVEs.

References

Other references2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-03.