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CVE-2024-26942: net: phy: qcom: at803x: fix kernel panic with at8031_probe

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-01 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: net: phy: qcom: at803x: fix kernel panic with at8031_probe On reworking and splitting the at803x driver, in splitting function of at803x PHYs it was added a NULL dereference bug where priv is referenced before it's actually allocated and then is tried to write to for the is_1000basex and is_fiber variables in the case of at8031, writing on the wrong address. Fix this by correctly setting priv local variable only after at803x_probe is called and actually allocates priv in the phydev struct.

Affected products

• Linux kernel: from 6.8 (excl.) before 6.8.3; 6.9-rc1 — fixed in 6.8.3

How to fix

Upgrade to a fixed version: Linux kernel 6.8.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/6a4aee277740d04ac0fd54cfa17cc28261932ddc
• https://git.kernel.org/stable/c/a8a296ad9957b845b89bcf48be1cf8c74875ecc3
• https://git.kernel.org/stable/c/6a4aee277740d04ac0fd54cfa17cc28261932ddc
• https://git.kernel.org/stable/c/a8a296ad9957b845b89bcf48be1cf8c74875ecc3

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