CVE-2026-64245
fbdev: modedb: fix a possible UAF in fb_find_mode()
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Description
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
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory 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
References (5)
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
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