What is CVE-2021-47137?

CVE-2021-47137 is a critical-severity vulnerability in Linux, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 9.8/10. Published 2024-03-25.

How severe is CVE-2021-47137?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Resource exhaustion in Linux

CVE-2021-47137

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.

Published 2024-03-25 · last modified 2026-08-04.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (47.0th percentile), scored 2026-10-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000

Affected products

Linux — versions fe1a56420cf2ec28c8eceef672b87de0bbe1a260, 4.20, 0
Linux Kernel — versions 5.13

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2021-47137?: CVE-2021-47137 is a critical-severity vulnerability in Linux, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 9.8/10. Published 2024-03-25.
How severe is CVE-2021-47137?: Critical severity. CVSS v3 base score is 9.8 out of 10.