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CVE-2026-46075: crypto: atmel-sha204a - Fix potential UAF and memory leak in remove path

• Severity: high (CVSS 7.8 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: 2026-05-27 · updated 2026-06-24
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: atmel-sha204a - Fix potential UAF and memory leak in remove path Unregister the hwrng to prevent new ->read() calls and flush the Atmel I2C workqueue before teardown to prevent a potential UAF if a queued callback runs while the device is being removed. Drop the early return to ensure sysfs entries are removed and ->hwrng.priv is freed, preventing a memory leak.

Affected products

• Linux kernel: from 5.3 before 6.1.175; from 6.2 before 6.6.140; from 6.7 before 6.12.86; from 6.13 before 6.18.27; from 6.19 before 7.0.4 — fixed in 6.1.175, 6.12.86, 6.18.27, 6.6.140, 7.0.4

How to fix

Upgrade to a fixed version: Linux kernel 6.1.175, 6.12.86, 6.18.27, 6.6.140. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1193c12126d39bf986a5a9214827b73707b193ab
• https://git.kernel.org/stable/c/31901371ccd16b42d2f167b1018ba9ae8bd5a6c7
• https://git.kernel.org/stable/c/6dbeb0f788582e1ab5dfc3f41994eac0ec88c2b5
• https://git.kernel.org/stable/c/775c00d87c385b758da9504cf053acea00e2ed40
• https://git.kernel.org/stable/c/bab1adf3b87e4bfac92c4f5963c63db434d561c1
• https://git.kernel.org/stable/c/c5a45d14234bf26e28a89e3a5dcc08336595cf11

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