CVE-2023-52510: ieee802154: ca8210: Fix a potential UAF in ca8210_probe

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: 2024-03-02 · updated 2026-06-17
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: ieee802154: ca8210: Fix a potential UAF in ca8210_probe If of_clk_add_provider() fails in ca8210_register_ext_clock(), it calls clk_unregister() to release priv->clk and returns an error. However, the caller ca8210_probe() then calls ca8210_remove(), where priv->clk is freed again in ca8210_unregister_ext_clock(). In this case, a use-after-free may happen in the second time we call clk_unregister(). Fix this by removing the first clk_unregister(). Also, priv->clk could be an error code on failure of clk_register_fixed_rate(). Use IS_ERR_OR_NULL to catch this case in ca8210_unregister_ext_clock().

Affected products

Linux kernel: from 4.12 before 4.14.328; from 4.15 before 4.19.297; from 4.20 before 5.4.259; from 5.5 before 5.10.199; from 5.11 before 5.15.136; from 5.16 before 6.1.59 — fixed in 4.14.328, 4.19.297, 5.10.199, 5.15.136, 5.4.259, 6.1.59

How to fix

Upgrade to a fixed version: Linux kernel 4.14.328, 4.19.297, 5.10.199, 5.15.136. Check the vendor advisory for mitigations.

References

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