What’s Vulnerable › Vulnerabilities

CVE-2026-93215: cdx: Fix double free when sysfs file creation fails

• Severity: unknown
• 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: 2026-09-24 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: cdx: Fix double free when sysfs file creation fails In cdx_create_res_attr(), if sysfs_create_bin_file() fails, the code frees res_attr but doesn't set cdx_dev->res_attr[num] to NULL. This leaves a dangling pointer in the array. Then cdx_destroy_res_attr() frees the already-freed memory. Fix the double free by initializing cdx_dev->res_attr[num] after sysfs_create_bin_file() completes.

Affected products

• Linux kernel: 6.8 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4cd24873ab9fdbd730604881a6e8087bc7b99336
• https://git.kernel.org/stable/c/6f4acc3a3c300e174e3f586b97b04ed8f5948c36
• https://git.kernel.org/stable/c/7e9451bf0bdba6daee1eaf4e7566612af6ca1c32
• https://git.kernel.org/stable/c/88f4cd42a04bdadd189d7f667a4c279f4e962ca6

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