CVE-2021-47652

Aliases:UBUNTU-CVE-2021-47652DEBIAN-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
0.26% LOW
0% probability +0.22%
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: 0.26%• Percentile: 17%

Techniques & Countermeasures

  • CWE-476•NULL Pointer Dereference

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

Affected Systems

  • debian•linux

    < 5.10.113-1 | < 5.17.3-1 | < 5.17.3-1 | < 5.17.3-1

  • ubuntu•linux

    all | < 4.15.0-189.200 | < 5.4.0-117.132 | < 5.15.0-37.39

  • ubuntu•linux-allwinner-5.19

    all

  • ubuntu•linux-aws

    all | < 4.15.0-1137.148 | < 5.4.0-1078.84 | < 5.15.0-1011.14

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    all

  • ubuntu•linux-aws-5.13

    all

  • ubuntu•linux-aws-5.19

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1078.84~18.04.1

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-6.2

    all

  • ubuntu•linux-aws-6.5

    all

  • ubuntu•linux-aws-fips

    < 4.15.0-2076.81 | all | < 5.4.0-1078.84+fips1

  • ubuntu•linux-aws-hwe

    < 4.15.0-1137.148~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1146.161~14.04.1 | < 4.15.0-1146.161~16.04.1 | all | < 5.4.0-1083.87 | < 5.15.0-1010.12

  • ubuntu•linux-azure-4.15

    < 4.15.0-1146.161

  • ubuntu•linux-azure-5.11

    all

  • ubuntu•linux-azure-5.13

    all

  • ubuntu•linux-azure-5.15

    < 5.15.0-1008.9~20.04.1

  • ubuntu•linux-azure-5.19

    all

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1083.87~18.04.1

  • ubuntu•linux-azure-5.8

    all

  • ubuntu•linux-azure-6.2

    all

  • ubuntu•linux-azure-6.5

    all

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde

    all

  • ubuntu•linux-azure-fde-5.19

    all

  • ubuntu•linux-azure-fde-6.2

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2057.63 | all | < 5.4.0-1083.87+fips1

  • ubuntu•linux-bluefield

    all | < 5.4.0-1040.44

  • ubuntu•linux-fips

    all | < 4.15.0-1094.105 | < 5.4.0-1054.61

  • ubuntu•linux-gcp

    < 4.15.0-1131.147~16.04.1 | all | < 5.4.0-1078.84 | < 5.15.0-1008.12

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1131.147

  • ubuntu•linux-gcp-5.11

    all

  • ubuntu•linux-gcp-5.13

    all

  • ubuntu•linux-gcp-5.19

    all

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1078.84~18.04.1

  • ubuntu•linux-gcp-5.8

    all

  • ubuntu•linux-gcp-6.2

    all

  • ubuntu•linux-gcp-6.5

    all

  • ubuntu•linux-gcp-fips

    < 4.15.0-2041.46 | all | < 5.4.0-1078.84+fips1

  • ubuntu•linux-gke

    all | < 5.15.0-1008.10

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.15

    all

  • ubuntu•linux-gke-5.4

    all

  • ubuntu•linux-gkeop

    all

  • ubuntu•linux-gkeop-5.15

    all

Showing first 50 affected entries in server-rendered view.

References (13)