CVE-2022-49455: misc: ocxl: fix possible double free in ocxl_file_register_afu
First published: Wed Feb 26 2025(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | >=5.2<5.4.198 | |
| Linux Kernel | >=5.5<5.10.121 | |
| Linux Kernel | >=5.11<5.15.46 | |
| Linux Kernel | >=5.16<5.17.14 | |
| Linux Kernel | >=5.18<5.18.3 |
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Reference Links
- https://git.kernel.org/stable/c/de65c32ace9aa70d51facc61ba986607075e3a25
- https://git.kernel.org/stable/c/ee89d8dee55ab4b3b8ad8b70866b2841ba334767
- https://git.kernel.org/stable/c/8fb674216835e1f0c143762696d645facebb4685
- https://git.kernel.org/stable/c/252768d32e92c1214aeebb5fec0844ca479bcf5c
- https://git.kernel.org/stable/c/9e9087cf34ee69f4e95d146ac29385d6e367a97b
- https://git.kernel.org/stable/c/950cf957fe34d40d63dfa3bf3968210430b6491e
Frequently Asked Questions
What is the severity of CVE-2022-49455?
The severity of CVE-2022-49455 is classified as medium due to the potential for double free vulnerabilities.
How do I fix CVE-2022-49455?
To fix CVE-2022-49455, update the Linux kernel to a version that includes the patch for this vulnerability.
What systems are affected by CVE-2022-49455?
CVE-2022-49455 affects various versions of the Linux kernel between 5.2 and 5.18.3.
What type of vulnerability is CVE-2022-49455?
CVE-2022-49455 is a double free vulnerability in the Linux kernel's OCXL driver.
What impacts can CVE-2022-49455 have on a system?
CVE-2022-49455 may allow an attacker to exploit memory management issues, potentially leading to system instability or unauthorized access.
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