What’s Vulnerable › Vulnerabilities

CVE-2023-53019: net: mdio: validate parameter addr in mdiobus_get_phy()

• Severity: high (CVSS 7.8 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: 2025-03-27 · updated 2026-06-17
• Weakness: CWE-129

Description

In the Linux kernel, the following vulnerability has been resolved: net: mdio: validate parameter addr in mdiobus_get_phy() The caller may pass any value as addr, what may result in an out-of-bounds access to array mdio_map. One existing case is stmmac_init_phy() that may pass -1 as addr. Therefore validate addr before using it.

Affected products

• Linux kernel: from 4.5 before 4.14.305; from 4.15 before 4.19.272; from 4.20 before 5.4.231; from 5.5 before 5.10.166; from 5.11 before 5.15.91; from 5.16 before 6.1.9 — fixed in 4.14.305, 4.19.272, 5.10.166, 5.15.91, 5.4.231, 6.1.9

How to fix

Upgrade to a fixed version: Linux kernel 4.14.305, 4.19.272, 5.10.166, 5.15.91. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1d80c259dfbadefa61b7ea334dfce5cb57f8c72f
• https://git.kernel.org/stable/c/4bc5f1f6bc94e695dfd912122af96e7115a0ddb8
• https://git.kernel.org/stable/c/7879626296e6ffd838ae0f2af1ab49ee46354973
• https://git.kernel.org/stable/c/867dbe784c5010a466f00a7d1467c1c5ea569c75
• https://git.kernel.org/stable/c/8a7b9560a3a8eb8724888c426e05926752f73aa0
• https://git.kernel.org/stable/c/ad67de330d83e8078372b52af18ffe8d39e26c85
• https://git.kernel.org/stable/c/c431a3d642593bbdb99e8a9e3eed608b730db6f8

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