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CVE-2024-43864

Linux Kernel use-after-free

9.8 CRITICALEPSS 0.47%
  1. Published20 Aug 2024

Description

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix CT entry update leaks of modify header context The cited commit allocates a new modify header to replace the old one when updating CT entry. But if failed to allocate a new one, eg. exceed the max number firmware can support, modify header will be an error pointer that will trigger a panic when deallocating it. And the old modify header point is copied to old attr. When the old attr is freed, the old modify header is lost. Fix it by restoring the old attr to attr when failed to allocate a new modify header context. So when the CT entry is freed, the right modify header context will be freed. And the panic of accessing error pointer is also fixed.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Linux Kernel≥ 6.3 < 6.6.45 · ≥ 6.7 < 6.10.4 · 6.11

Remediation

Fixed in
Linux Kernel≥ 6.6.45

References

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Frequently asked

Is CVE-2024-43864 being actively exploited?

CVE-2024-43864 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.47%.

How severe is CVE-2024-43864?

CVE-2024-43864 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.47% probability of exploitation.

Which products are affected by CVE-2024-43864?

Affected products include Linux Kernel.

How do I fix CVE-2024-43864?

Upgrade affected software to a fixed version, for example Linux Kernel 6.6.45 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-43864 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.