CVE-2021-47547: net: tulip: de4x5: fix the problem that the array 'lp->phy[8]' may be out of bound

Severity: medium (CVSS 4.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-24 · updated 2026-06-17
Weakness: CWE-129

Description

In the Linux kernel, the following vulnerability has been resolved: net: tulip: de4x5: fix the problem that the array 'lp->phy[8]' may be out of bound In line 5001, if all id in the array 'lp->phy[8]' is not 0, when the 'for' end, the 'k' is 8. At this time, the array 'lp->phy[8]' may be out of bound.

Affected products

Linux kernel: before 4.4.294; from 4.5 before 4.9.292; from 4.10 before 4.14.257; from 4.15 before 4.19.220; from 4.20 before 5.4.164; from 5.5 before 5.10.84 — fixed in 4.14.257, 4.19.220, 4.4.294, 4.9.292, 5.10.84, 5.15.7

How to fix

Upgrade to a fixed version: Linux kernel 4.14.257, 4.19.220, 4.4.294, 4.9.292. Check the vendor advisory for mitigations.

References

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