Is CVE-2024-40920 in the CISA KEV catalog?

No. CVE-2024-40920 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-40920?

CVE-2024-40920 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2024-40920?

CVE-2024-40920 has an EPSS score of 0.29% (21th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-40920?

Upgrade linux on debian 12 to 6.1.99-1 or later. Fixes are available for 73 affected products.

CVE & CISA-KEV Catalog

CVE-2024-40920

HIGH

7.8

CVSS v3

NVD

Description

In the Linux kernel, the following vulnerability has been resolved: net: bridge: mst: fix suspicious rcu usage in br_mst_set_state I converted br_mst_set_state to RCU to avoid a vlan use-after-free but forgot to change the vlan group dereference helper. Switch to vlan group RCU deref helper to fix the suspicious rcu usage warning.

CWE-416Use After Free

How to fix

Remediation Available

linuxDebian

Fixed in:6.1.99-1CVE-2024-40920

Fixed in:6.9.7-1CVE-2024-40920

linuxUbuntu

Fixed in:6.8.0-44.44USN-6999-1

linux-awsUbuntu

Fixed in:6.8.0-1015.16USN-6999-1

linux-azureUbuntu

Fixed in:6.8.0-1014.16USN-7004-1

linux-gcpUbuntu

Fixed in:6.8.0-1014.16USN-6999-1

linux-gkeUbuntu

Fixed in:6.8.0-1010.13USN-6999-1

linux-hwe-6.8Ubuntu

Fixed in:6.8.0-45.45~22.04.1USN-7029-1

linux-ibmUbuntu

Fixed in:6.8.0-1012.12USN-6999-1

linux-image-6.8.0-1010-gkeUbuntu

Fixed in:6.8.0-1010.13USN-6999-1

linux-image-6.8.0-1011-raspiUbuntu

Fixed in:6.8.0-1011.12USN-6999-2

linux-image-6.8.0-1012-ibmUbuntu

Fixed in:6.8.0-1012.12USN-6999-1

linux-image-6.8.0-1012-oemUbuntu

Fixed in:6.8.0-1012.12USN-6999-1

linux-image-6.8.0-1012-oracleUbuntu

Fixed in:6.8.0-1012.12USN-6999-1

linux-image-6.8.0-1012-oracle-64kUbuntu

Fixed in:6.8.0-1012.12USN-6999-1

linux-image-6.8.0-1013-nvidiaUbuntu

Fixed in:6.8.0-1013.14~22.04.1USN-7005-2

Fixed in:6.8.0-1013.14USN-7005-1

linux-image-6.8.0-1013-nvidia-64kUbuntu

Fixed in:6.8.0-1013.14~22.04.1USN-7005-2

Fixed in:6.8.0-1013.14USN-7005-1

linux-image-6.8.0-1013-nvidia-lowlatencyUbuntu

Fixed in:6.8.0-1013.14.1USN-7005-1

linux-image-6.8.0-1013-nvidia-lowlatency-64kUbuntu

Fixed in:6.8.0-1013.14.1USN-7005-1

linux-image-6.8.0-1014-azureUbuntu

Fixed in:6.8.0-1014.16USN-7004-1

linux-image-6.8.0-1014-azure-fdeUbuntu

Fixed in:6.8.0-1014.16USN-7004-1

linux-image-6.8.0-1014-gcpUbuntu

Fixed in:6.8.0-1014.16USN-6999-1

linux-image-6.8.0-1015-awsUbuntu

Fixed in:6.8.0-1015.16USN-6999-1

linux-image-6.8.0-44-genericUbuntu

Fixed in:6.8.0-44.44USN-6999-1

linux-image-6.8.0-44-generic-64kUbuntu

Fixed in:6.8.0-44.44USN-6999-1

linux-image-6.8.0-44-lowlatencyUbuntu

Fixed in:6.8.0-44.44.1~22.04.1USN-7008-1

Fixed in:6.8.0-44.44.1USN-6999-1

linux-image-6.8.0-44-lowlatency-64kUbuntu

Fixed in:6.8.0-44.44.1~22.04.1USN-7008-1

Fixed in:6.8.0-44.44.1USN-6999-1

linux-image-6.8.0-45-genericUbuntu

Fixed in:6.8.0-45.45~22.04.1USN-7029-1

linux-image-6.8.0-45-generic-64kUbuntu

Fixed in:6.8.0-45.45~22.04.1USN-7029-1

linux-image-awsUbuntu

Fixed in:6.8.0-1015.16USN-6999-1

linux-image-azureUbuntu

Fixed in:6.8.0-1014.16USN-7004-1

linux-image-azure-fdeUbuntu

Fixed in:6.8.0-1014.16USN-7004-1

linux-image-gcpUbuntu

Fixed in:6.8.0-1014.16USN-6999-1

linux-image-genericUbuntu

Fixed in:6.8.0-44.44USN-6999-1

linux-image-generic-64kUbuntu

Fixed in:6.8.0-44.44USN-6999-1

linux-image-generic-64k-hwe-22.04Ubuntu

Fixed in:6.8.0-45.45~22.04.1USN-7029-1

linux-image-generic-64k-hwe-24.04Ubuntu

Fixed in:6.8.0-44.44USN-6999-1

linux-image-generic-hwe-22.04Ubuntu

Fixed in:6.8.0-45.45~22.04.1USN-7029-1

linux-image-generic-hwe-24.04Ubuntu

Fixed in:6.8.0-44.44USN-6999-1

linux-image-generic-lpaeUbuntu

Fixed in:6.8.0-44.44USN-6999-1

linux-image-gkeUbuntu

Fixed in:6.8.0-1010.13USN-6999-1

linux-image-ibmUbuntu

Fixed in:6.8.0-1012.12USN-6999-1

linux-image-ibm-classicUbuntu

Fixed in:6.8.0-1012.12USN-6999-1

linux-image-ibm-lts-24.04Ubuntu

Fixed in:6.8.0-1012.12USN-6999-1

linux-image-kvmUbuntu

Fixed in:6.8.0-44.44USN-6999-1

linux-image-lowlatencyUbuntu

Fixed in:6.8.0-44.44.1USN-6999-1

linux-image-lowlatency-64kUbuntu

Fixed in:6.8.0-44.44.1USN-6999-1

linux-image-lowlatency-64k-hwe-22.04Ubuntu

Fixed in:6.8.0-44.44.1~22.04.1USN-7008-1

linux-image-lowlatency-hwe-22.04Ubuntu

Fixed in:6.8.0-44.44.1~22.04.1USN-7008-1

linux-image-nvidiaUbuntu

Fixed in:6.8.0-1013.13USN-7005-1

linux-image-nvidia-6.8Ubuntu

Fixed in:6.8.0-1013.14~22.04.1USN-7005-2

linux-image-nvidia-64kUbuntu

Fixed in:6.8.0-1013.13USN-7005-1

linux-image-nvidia-64k-6.8Ubuntu

Fixed in:6.8.0-1013.14~22.04.1USN-7005-2

linux-image-nvidia-lowlatencyUbuntu

Fixed in:6.8.0-1013.14.1USN-7005-1

linux-image-nvidia-lowlatency-64kUbuntu

Fixed in:6.8.0-1013.14.1USN-7005-1

linux-image-oem-22.04Ubuntu

Fixed in:6.8.0-45.45~22.04.1USN-7029-1

linux-image-oem-22.04aUbuntu

Fixed in:6.8.0-45.45~22.04.1USN-7029-1

linux-image-oem-22.04bUbuntu

Fixed in:6.8.0-45.45~22.04.1USN-7029-1

linux-image-oem-22.04cUbuntu

Fixed in:6.8.0-45.45~22.04.1USN-7029-1

linux-image-oem-22.04dUbuntu

Fixed in:6.8.0-45.45~22.04.1USN-7029-1

linux-image-oracleUbuntu

Fixed in:6.8.0-1012.12USN-6999-1

linux-image-oracle-64kUbuntu

Fixed in:6.8.0-1012.12USN-6999-1

linux-image-raspiUbuntu

Fixed in:6.8.0-1011.12USN-6999-2

linux-image-virtualUbuntu

Fixed in:6.8.0-44.44USN-6999-1

linux-image-virtual-hwe-22.04Ubuntu

Fixed in:6.8.0-45.45~22.04.1USN-7029-1

linux-image-virtual-hwe-24.04Ubuntu

Fixed in:6.8.0-44.44USN-6999-1

linux-lowlatencyUbuntu

Fixed in:6.8.0-44.44.1USN-6999-1

linux-lowlatency-hwe-6.8Ubuntu

Fixed in:6.8.0-44.44.1~22.04.1USN-7008-1

linux-nvidiaUbuntu

Fixed in:6.8.0-1013.14USN-7005-1

linux-nvidia-6.8Ubuntu

Fixed in:6.8.0-1013.14~22.04.1USN-7005-2

linux-nvidia-lowlatencyUbuntu

Fixed in:6.8.0-1013.14.1USN-7005-1

linux-oem-6.8Ubuntu

Fixed in:6.8.0-1012.12USN-6999-1

linux-oracleUbuntu

Fixed in:6.8.0-1012.12USN-6999-1

linux-raspiUbuntu

Fixed in:6.8.0-1011.12USN-6999-2

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 ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.29%probability of exploitation in 30 days

21stpercentile

Low risk: more likely to be exploited than 21% of all known CVEs.

References

Patch4

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	Fix

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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.