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CVE-2024-45030

Linux Kernel buffer overflow

9.8 CRITICALEPSS 0.48%
  1. Published11 Sept 2024

Description

In the Linux kernel, the following vulnerability has been resolved: igb: cope with large MAX_SKB_FRAGS Sabrina reports that the igb driver does not cope well with large MAX_SKB_FRAG values: setting MAX_SKB_FRAG to 45 causes payload corruption on TX. An easy reproducer is to run ssh to connect to the machine. With MAX_SKB_FRAGS=17 it works, with MAX_SKB_FRAGS=45 it fails. This has been reported originally in https://bugzilla.redhat.com/show_bug.cgi?id=2265320 The root cause of the issue is that the driver does not take into account properly the (possibly large) shared info size when selecting the ring layout, and will try to fit two packets inside the same 4K page even when the 1st fraglist will trump over the 2nd head. Address the issue by checking if 2K buffers are insufficient.

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≥ 6.4 < 6.6.48 · ≥ 6.7 < 6.10.7 · 6.11

Remediation

Fixed in
Linux Kernel≥ 6.6.48

References

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Frequently asked

Is CVE-2024-45030 being actively exploited?

CVE-2024-45030 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.48%.

How severe is CVE-2024-45030?

CVE-2024-45030 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.48% probability of exploitation.

Which products are affected by CVE-2024-45030?

Affected products include Linux Kernel.

How do I fix CVE-2024-45030?

Upgrade affected software to a fixed version, for example Linux Kernel 6.6.48 or later, then confirm no affected versions remain in your inventory.

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