9.8

CVE-2021-47137: net: lantiq: fix memory corruption in RX ring

Modified
AliasesUBUNTU-CVE-2021-47137DEBIAN-CVE-2021-47137
Published 25-03-2024Last modified 05-08-2026

Vulnerability summary

CVE-2021-47137 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.60% chance of exploitation in the next 30 days, higher than 48.8% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.60%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
SUSE-SU-2024:1465-1SUSE-SU-2024:1489-1

Timeline

  1. 25-03-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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 metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.60%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.60% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu82 products
  • linux< 5.4.0-80.90
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.4.0-1054.57
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ fe1a56420cf2ec28c8eceef672b87de0bbe1a260, < 8bb1077448d43a871ed667520763e3b9f9b7975d | ≥ fe1a56420cf2ec28c8eceef672b87de0bbe1a260, < 5ac72351655f8b033a2935646f53b7465c903418 | ≥ fe1a56420cf2ec28c8eceef672b87de0bbe1a260, < 46dd4abced3cb2c912916f4a5353e0927db0c4a2 | ≥ fe1a56420cf2ec28c8eceef672b87de0bbe1a260, < c7718ee96dbc2f9c5fc3b578abdf296dd44b9c20 | 4.20
  • linux_kernel≥ 4.20, < 5.4.124 | ≥ 5.5, < 5.10.42 | ≥ 5.11, < 5.12.9 | 5.13:rc1 | 5.13:rc2 | 5.13:rc3
Debian1 product
  • linux< 5.14.6-1

3 vendors · 85 products

References

7 links