VULNERABILITY

Debian: CVE-2021-47652: linux -- security update

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Debian: CVE-2021-47652: linux -- security update

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:C/I:N/A:N)
Published
02/27/2025
Created
03/10/2025
Added
02/27/2025
Modified
03/21/2025

Description

In the Linux kernel, the following vulnerability has been resolved: video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe() I got a null-ptr-deref report: BUG: kernel NULL pointer dereference, address: 0000000000000000 ... RIP: 0010:fb_destroy_modelist+0x38/0x100 ... Call Trace: ufx_usb_probe.cold+0x2b5/0xac1 [smscufx] usb_probe_interface+0x1aa/0x3c0 [usbcore] really_probe+0x167/0x460 ... ret_from_fork+0x1f/0x30 If fb_alloc_cmap() fails in ufx_usb_probe(), fb_destroy_modelist() will be called to destroy modelist in the error handling path. But modelist has not been initialized yet, so it will result in null-ptr-deref. Initialize modelist before calling fb_alloc_cmap() to fix this bug.

Solution(s)

  • debian-upgrade-linux

References

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