In the Linux kernel, the following vulnerability has been resolved:
video: fbdev: vesafb: Fix a use-after-free due early fb_info cleanup
Commit b3c9a924aab6 ("fbdev: vesafb: Cleanup fb_info in .fb_destroy rather
than .remove") fixed a use-after-free error due the vesafb driver freeing
the fb_info in the .remove handler instead of doing it in .fb_destroy.
This can happen if the .fb_destroy callback is executed after the .remove
callback, since the former tries to access a pointer freed by the latter.
But that change didn't take into account that another possible scenario is
that .fb_destroy is called before the .remove callback. For example, if no
process has the fbdev chardev opened by the time the driver is removed.
If that's the case, fb_info will be freed when unregister_framebuffer() is
called, making the fb_info pointer accessed in vesafb_remove() after that
to no longer be valid.
To prevent that, move the expression containing the info->par to happen
before the unregister_framebuffer() function call.
CVSS
No CVSS.
References
Configurations
Configuration 1 (hide)
|
History
24 Mar 2025, 19:57
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| References | () https://git.kernel.org/stable/c/f605f5558ecc175ec70016a3c15f007cb6386531 - Patch | |
| References | () https://git.kernel.org/stable/c/acde4003efc16480375543638484d8f13f2e99a3 - Patch | |
| References | () https://git.kernel.org/stable/c/d260cad015945d1f4bb9b028a096f648506106a2 - Patch | |
| References | () https://git.kernel.org/stable/c/0fac5f8fb1bc2fc4f8714bf5e743c9cc3f547c63 - Patch |
26 Feb 2025, 07:01
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-02-26 07:01
Updated : 2025-03-24 19:57
NVD link : CVE-2022-49419
Mitre link : CVE-2022-49419
JSON object : View
Products Affected
linux
- linux_kernel
CWE
No CWE.