5.5

CVE-2021-47171: net: usb: fix memory leak in smsc75xx_bind

Modified
AliasesUBUNTU-CVE-2021-47171DEBIAN-CVE-2021-47171
Published 25-03-2024Last modified 11-05-2026

Vulnerability summary

CVE-2021-47171 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · 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 12 · Related 10
RHSA-2024:3618RHSA-2024:3627SUSE-SU-2024:1454-1SUSE-SU-2024:1465-1SUSE-SU-2024:1489-1SUSE-SU-2024:1643-1

Timeline

  1. 25-03-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: usb: fix memory leak in smsc75xx_bind Syzbot reported memory leak in smsc75xx_bind(). The problem was is non-freed memory in case of errors after memory allocation. backtrace: [<ffffffff84245b62>] kmalloc include/linux/slab.h:556 [inline] [<ffffffff84245b62>] kzalloc include/linux/slab.h:686 [inline] [<ffffffff84245b62>] smsc75xx_bind+0x7a/0x334 drivers/net/usb/smsc75xx.c:1460 [<ffffffff82b5b2e6>] usbnet_probe+0x3b6/0xc30 drivers/net/usb/usbnet.c:1728

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

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.

Ubuntu86 products
  • linuxAll versions (No fix recorded) | < 4.4.0-258.292 | < 4.15.0-151.157 | < 5.4.0-80.90
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1135.141 | < 4.4.0-1173.188 | < 4.15.0-1109.116 | < 5.4.0-1054.57
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ d0cad871703b898a442e4049c532ec39168e5b57, < 200dbfcad8011e50c3cec269ed7b980836eeb1fa | ≥ d0cad871703b898a442e4049c532ec39168e5b57, < 22c840596af0c09068b6cf948616e6496e59e07f | ≥ d0cad871703b898a442e4049c532ec39168e5b57, < 9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbc | ≥ d0cad871703b898a442e4049c532ec39168e5b57, < 9e6a3eccb28779710cbbafc4f4258d92509c6d07 | ≥ d0cad871703b898a442e4049c532ec39168e5b57, < b95fb96e6339e34694dd578fb6bde3575b01af17 | ≥ d0cad871703b898a442e4049c532ec39168e5b57, < 635ac38b36255d3cfb8312cf7c471334f4d537e0 | ≥ d0cad871703b898a442e4049c532ec39168e5b57, < 70c886ac93f87ae7214a0c69151a28a8075dd95b | ≥ d0cad871703b898a442e4049c532ec39168e5b57, < 46a8b29c6306d8bbfd92b614ef65a47c900d8e70 | 2.6.34
  • linux_kernel≥ 2.6.34, < 4.4.271 | ≥ 4.5, < 4.9.271 | ≥ 4.10, < 4.14.235 | ≥ 4.15, < 4.19.193 | ≥ 4.20, < 5.4.124 | ≥ 5.5, < 5.10.42 | ≥ 5.11, < 5.12.9
Debian1 product
  • linux< 5.14.6-1

3 vendors · 89 products

References

12 links
Show all 12 references