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CVE-2024-39293

Linux Kernel race condition

9.8 CRITICALEPSS 0.31%
  1. Published25 Jun 2024

Description

In the Linux kernel, the following vulnerability has been resolved: Revert "xsk: Support redirect to any socket bound to the same umem" This reverts commit 2863d665ea41282379f108e4da6c8a2366ba66db. This patch introduced a potential kernel crash when multiple napi instances redirect to the same AF_XDP socket. By removing the queue_index check, it is possible for multiple napi instances to access the Rx ring at the same time, which will result in a corrupted ring state which can lead to a crash when flushing the rings in __xsk_flush(). This can happen when the linked list of sockets to flush gets corrupted by concurrent accesses. A quick and small fix is not possible, so let us revert this for now.

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≥ 6.9 < 6.9.5 · 6.10

Remediation

Fixed in
Linux Kernel≥ 6.9.5

References

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Frequently asked

Is CVE-2024-39293 being actively exploited?

CVE-2024-39293 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.31%.

How severe is CVE-2024-39293?

CVE-2024-39293 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.31% probability of exploitation.

Which products are affected by CVE-2024-39293?

Affected products include Linux Kernel.

How do I fix CVE-2024-39293?

Upgrade affected software to a fixed version, for example Linux Kernel 6.9.5 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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