7.8

CVE-2021-47372: net: macb: fix use after free on rmmod

Analyzed
AliasesUBUNTU-CVE-2021-47372DEBIAN-CVE-2021-47372
Published 21-05-2024Last modified 11-05-2026

Vulnerability summary

CVE-2021-47372 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.24%
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 11 · Related 11
SUSE-SU-2024:2008-1SUSE-SU-2024:2011-1SUSE-SU-2024:2019-1SUSE-SU-2024:2189-1SUSE-SU-2024:2190-1SUSE-SU-2024:2360-1

Timeline

  1. 21-05-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: macb: fix use after free on rmmod plat_dev->dev->platform_data is released by platform_device_unregister(), use of pclk and hclk is a use-after-free. Since device unregister won't need a clk device we adjust the function call sequence to fix this issue. [ 31.261225] BUG: KASAN: use-after-free in macb_remove+0x77/0xc6 [macb_pci] [ 31.275563] Freed by task 306: [ 30.276782] platform_device_release+0x25/0x80

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.24% 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: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu88 products
  • linuxAll versions (No fix recorded) | < 4.15.0-163.171 | < 5.4.0-91.102
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1116.123 | < 5.4.0-1060.63
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 83a77e9ec4150ee4acc635638f7dedd9da523a26, < a7d521cc726f30b8e679a6f36d04b18a8ab3c536 | ≥ 83a77e9ec4150ee4acc635638f7dedd9da523a26, < 46670fb832ee80943715df618632ca13c2e96f2b | ≥ 83a77e9ec4150ee4acc635638f7dedd9da523a26, < 1da750d1e2140ef43d64d17f301ff6f41b45541e | ≥ 83a77e9ec4150ee4acc635638f7dedd9da523a26, < 7721221e87d25c9840d9ca6b986dbdc410d5ce2b | ≥ 83a77e9ec4150ee4acc635638f7dedd9da523a26, < 4ad6f2d23b0f6ac0d3e5f3102a4256d1c86c90f5 | ≥ 83a77e9ec4150ee4acc635638f7dedd9da523a26, < d82d5303c4c539db86588ffb5dc5b26c3f1513e8 | 4.10
  • linux_kernel< 4.14.249 | ≥ 4.15, < 4.19.209 | ≥ 4.20, < 5.4.150 | ≥ 5.5, < 5.10.70 | ≥ 5.11, < 5.14.9 | 5.15:rc1
Debian1 product
  • linux< 5.14.9-1

3 vendors · 91 products

References

10 links