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CVE-2021-47137

Linux Kernel denial of service

9.8 CRITICALEPSS 0.60%
  1. Published25 Mar 2024

Description

In the Linux kernel, the following vulnerability has been resolved: net: lantiq: fix memory corruption in RX ring In a situation where memory allocation or dma mapping fails, an invalid address is programmed into the descriptor. This can lead to memory corruption. If the memory allocation fails, DMA should reuse the previous skb and mapping and drop the packet. This patch also increments rx drop counter.

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≥ 4.20 < 5.4.124 · ≥ 5.11 < 5.12.9 · ≥ 5.5 < 5.10.42 · 5.13

Remediation

Fixed in
Linux Kernel≥ 5.4.124

References

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Frequently asked

Is CVE-2021-47137 being actively exploited?

CVE-2021-47137 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.60%.

How severe is CVE-2021-47137?

CVE-2021-47137 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.60% probability of exploitation.

Which products are affected by CVE-2021-47137?

Affected products include Linux Kernel.

How do I fix CVE-2021-47137?

Upgrade affected software to a fixed version, for example Linux Kernel 5.4.124 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.