Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.2, < 4.9.311 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0fd28daec73525382e5c992db8743bf76e42cd5cPatch
- https://git.kernel.org/stable/c/1791f487f877a9e83d81c8677bd3e7b259e7cb27Patch
- https://git.kernel.org/stable/c/64ec3e678d76419f207b9cdd338dda438ca10b1cPatch
- https://git.kernel.org/stable/c/9280ef235b05e8f19f8bc6d547b992f0a0ef398dPatch
- https://git.kernel.org/stable/c/c420b540db4b5d69de0a36d8b9d9a6a79a04f05aPatch
- https://git.kernel.org/stable/c/d1b6a1f0c23b7164250479bf92e2893291dca539Patch
- https://git.kernel.org/stable/c/d396c651e2b508b6179bb678cc029f3becbf5170Patch
- https://git.kernel.org/stable/c/da8b269cc0a2526ebeaccbe2484c999eb0f822cfPatch
- https://git.kernel.org/stable/c/dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4bPatch
FAQ
What is CVE-2021-47652?
CVE-2021-47652 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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,...
How severe is CVE-2021-47652?
CVE-2021-47652 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-47652?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.