CVE-2022-49061: net: ethernet: stmmac: fix altr_tse_pcs function when using a fixed-link

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-02-26 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: stmmac: fix altr_tse_pcs function when using a fixed-link When using a fixed-link, the altr_tse_pcs driver crashes due to null-pointer dereference as no phy_device is provided to tse_pcs_fix_mac_speed function. Fix this by adding a check for phy_dev before calling the tse_pcs_fix_mac_speed() function. Also clean up the tse_pcs_fix_mac_speed function a bit. There is no need to check for splitter_base and sgmii_adapter_base because the driver will fail if these 2 variables are not derived from the device tree.

Affected products

Linux kernel: from 4.8 before 5.4.190; from 5.5 before 5.10.112; from 5.11 before 5.15.35; from 5.16 before 5.17.4; 5.18-rc1, 5.18-rc2 — fixed in 5.10.112, 5.15.35, 5.17.4, 5.4.190

How to fix

Upgrade to a fixed version: Linux kernel 5.10.112, 5.15.35, 5.17.4, 5.4.190. Check the vendor advisory for mitigations.

References

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