CVE-2026-64245

Summary

In the Linux kernel, the following vulnerability has been resolved:

fbdev: modedb: fix a possible UAF in fb_find_mode()

If mode_option is NULL, it is assigned from mode_option_buf:

if (!mode_option) { fb_get_options(NULL, &mode_option_buf); mode_option = mode_option_buf; }

Later, name is assigned from mode_option:

const char *name = mode_option;

However, mode_option_buf is freed before name is no longer used:

kfree(mode_option_buf);

while name is still accessed by:

if ((name_matches(db[i], name, namelen) ||

Since name aliases mode_option_buf, this may result in a use-after-free.

Fix this by extending the lifetime of mode_option_buf until the end of the function by using scope-based resource management for cleanup.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/c7dc382439f7b019e207055b52e9cec051d42fa9
• https://git.kernel.org/stable/c/f906347d75c7fc377041c6d3c535d0f08846aada
• https://git.kernel.org/stable/c/4d418cf8daf57e454b4d855bf9b2419fd8e6a540
• https://git.kernel.org/stable/c/13b6f0cdd5cd5e60f682ec43134ab0e2024bd356
• https://git.kernel.org/stable/c/85b6256469cebdac395e7447147e06b2e151014f

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