What’s Vulnerable › Vulnerabilities

CVE-2022-49455: misc: ocxl: fix possible double free in ocxl_file_register_afu

• Severity: high (CVSS 7.8 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-415

Description

In the Linux kernel, the following vulnerability has been resolved: misc: ocxl: fix possible double free in ocxl_file_register_afu info_release() will be called in device_unregister() when info->dev's reference count is 0. So there is no need to call ocxl_afu_put() and kfree() again. Fix this by adding free_minor() and return to err_unregister error path.

Affected products

• Linux kernel: from 5.2 before 5.4.198; from 5.5 before 5.10.121; from 5.11 before 5.15.46; from 5.16 before 5.17.14; from 5.18 before 5.18.3 — fixed in 5.10.121, 5.15.46, 5.17.14, 5.18.3, 5.4.198

How to fix

Upgrade to a fixed version: Linux kernel 5.10.121, 5.15.46, 5.17.14, 5.18.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/252768d32e92c1214aeebb5fec0844ca479bcf5c
• https://git.kernel.org/stable/c/8fb674216835e1f0c143762696d645facebb4685
• https://git.kernel.org/stable/c/950cf957fe34d40d63dfa3bf3968210430b6491e
• https://git.kernel.org/stable/c/9e9087cf34ee69f4e95d146ac29385d6e367a97b
• https://git.kernel.org/stable/c/de65c32ace9aa70d51facc61ba986607075e3a25
• https://git.kernel.org/stable/c/ee89d8dee55ab4b3b8ad8b70866b2841ba334767

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