CVE-2021-47652

Advisory lineage Upstream: 0 Downstream: 9
Modified
Published: 26 Feb 2025, 01:54
Last modified:11 May 2026, 13:58

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (cve.org)
EPSS Score
0.01% LOW
0% probability -0.02%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

26 Feb 2025, 01:54
Published
Vulnerability first disclosed
11 May 2026, 13:58
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 2%

Techniques & Countermeasures

  • CWE-476•NULL Pointer Dereference

    The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

  • linux•linux

    ≥ 3c8a63e22a0802fd56380f6ab305b419f18eb6f5, < d1b6a1f0c23b7164250479bf92e2893291dca539 | ≥ 3c8a63e22a0802fd56380f6ab305b419f18eb6f5, < 0fd28daec73525382e5c992db8743bf76e42cd5c | ≥ 3c8a63e22a0802fd56380f6ab305b419f18eb6f5, < dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4b | ≥ 3c8a63e22a0802fd56380f6ab305b419f18eb6f5, < da8b269cc0a2526ebeaccbe2484c999eb0f822cf | ≥ 3c8a63e22a0802fd56380f6ab305b419f18eb6f5, < 64ec3e678d76419f207b9cdd338dda438ca10b1c | ≥ 3c8a63e22a0802fd56380f6ab305b419f18eb6f5, < c420b540db4b5d69de0a36d8b9d9a6a79a04f05a | ≥ 3c8a63e22a0802fd56380f6ab305b419f18eb6f5, < d396c651e2b508b6179bb678cc029f3becbf5170 | ≥ 3c8a63e22a0802fd56380f6ab305b419f18eb6f5, < 9280ef235b05e8f19f8bc6d547b992f0a0ef398d | ≥ 3c8a63e22a0802fd56380f6ab305b419f18eb6f5, < 1791f487f877a9e83d81c8677bd3e7b259e7cb27 | 3.2

  • linux•linux_kernel

    ≥ 3.2, < 4.9.311 | ≥ 4.10, < 4.14.276 | ≥ 4.15, < 4.19.238 | ≥ 4.20, < 5.4.189 | ≥ 5.5, < 5.10.110 | ≥ 5.11, < 5.15.33 | ≥ 5.16, < 5.16.19 | ≥ 5.17, < 5.17.2

References (9)