CVE-2022-49419: 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…

PriorityP339high7.8CVSS 3.1

AVLACLPRLUINSUCHIHAH

EPSS

0.26%

18.0th percentile

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.

Affected

14 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 5.18.5-1 (bookworm)	linux 5.18.5-1 (bookworm)
linux	linux	—	—
linux	linux	>= 5.15.41 < 5.15.46	5.15.46
linux	linux	>= 5.17.9 < 5.17.14	5.17.14
linux	linux	>= a1aac13288de2935dc1a9330a93b1ac92f1e2b72 < f605f5558ecc175ec70016a3c15f007cb6386531	f605f5558ecc175ec70016a3c15f007cb6386531
linux	linux	>= b3c9a924aab61adbc29df110006aa03afe1a78ba < d260cad015945d1f4bb9b028a096f648506106a2	d260cad015945d1f4bb9b028a096f648506106a2
linux	linux	>= b3c9a924aab61adbc29df110006aa03afe1a78ba < acde4003efc16480375543638484d8f13f2e99a3	acde4003efc16480375543638484d8f13f2e99a3
linux	linux	>= f94aa46efaa087ec075c83e4508f943fb5e43977 < 0fac5f8fb1bc2fc4f8714bf5e743c9cc3f547c63	0fac5f8fb1bc2fc4f8714bf5e743c9cc3f547c63
linux	linux_kernel	>= 0 < 5.18.5-1	5.18.5-1
linux	linux_kernel	>= 0 < 5.18.5-1	5.18.5-1
linux	linux_kernel	>= 0 < 5.18.5-1	5.18.5-1
linux	linux_kernel	>= 5.15.41 < 5.15.46	5.15.46
linux	linux_kernel	>= 5.17.9 < 5.17.14	5.17.14
linux	linux_kernel	>= 5.18 < 5.18.3	5.18.3

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

osv7.8HIGH

vendor_debian7.8HIGH

vendor_redhat7.8HIGH

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