cbcvebase.
CVE-2021-47652
published 2025-02-26

CVE-2021-47652: 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…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.26%
16.9th percentile
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.

Affected

23 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 5.17.3-1 (bookworm)linux 5.17.3-1 (bookworm)
linuxlinux——
linuxlinux>= 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < d1b6a1f0c23b7164250479bf92e2893291dca539d1b6a1f0c23b7164250479bf92e2893291dca539
linuxlinux>= 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < 0fd28daec73525382e5c992db8743bf76e42cd5c0fd28daec73525382e5c992db8743bf76e42cd5c
linuxlinux>= 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4bdd3a6cc7385b89ec2303f39dfc3bafa4e24cec4b
linuxlinux>= 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < da8b269cc0a2526ebeaccbe2484c999eb0f822cfda8b269cc0a2526ebeaccbe2484c999eb0f822cf
linuxlinux>= 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < 64ec3e678d76419f207b9cdd338dda438ca10b1c64ec3e678d76419f207b9cdd338dda438ca10b1c
linuxlinux>= 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < c420b540db4b5d69de0a36d8b9d9a6a79a04f05ac420b540db4b5d69de0a36d8b9d9a6a79a04f05a
linuxlinux>= 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < d396c651e2b508b6179bb678cc029f3becbf5170d396c651e2b508b6179bb678cc029f3becbf5170
linuxlinux>= 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < 9280ef235b05e8f19f8bc6d547b992f0a0ef398d9280ef235b05e8f19f8bc6d547b992f0a0ef398d
linuxlinux>= 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 < 1791f487f877a9e83d81c8677bd3e7b259e7cb271791f487f877a9e83d81c8677bd3e7b259e7cb27
linuxlinux_kernel>= 0 < 5.10.113-15.10.113-1
linuxlinux_kernel>= 0 < 5.17.3-15.17.3-1
linuxlinux_kernel>= 0 < 5.17.3-15.17.3-1
linuxlinux_kernel>= 0 < 5.17.3-15.17.3-1
linuxlinux_kernel>= 3.2 < 4.9.3114.9.311
linuxlinux_kernel>= 4.10 < 4.14.2764.14.276
linuxlinux_kernel>= 4.15 < 4.19.2384.19.238
linuxlinux_kernel>= 4.20 < 5.4.1895.4.189
linuxlinux_kernel>= 5.11 < 5.15.335.15.33
linuxlinux_kernel>= 5.16 < 5.16.195.16.19
linuxlinux_kernel>= 5.17 < 5.17.25.17.2
linuxlinux_kernel>= 5.5 < 5.10.1105.10.110

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.