CVE-2021-47652
- Source
- https://cve.org/CVERecord?id=CVE-2021-47652
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47652.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-47652
- Downstream
- Related
- Published
- 2025-02-26T06:37:06Z
- Modified
- 2026-03-13T05:18:12Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
-
- https://git.kernel.org/stable/c/0fd28daec73525382e5c992db8743bf76e42cd5c
- https://git.kernel.org/stable/c/1791f487f877a9e83d81c8677bd3e7b259e7cb27
- https://git.kernel.org/stable/c/64ec3e678d76419f207b9cdd338dda438ca10b1c
- https://git.kernel.org/stable/c/c420b540db4b5d69de0a36d8b9d9a6a79a04f05a
- https://git.kernel.org/stable/c/d1b6a1f0c23b7164250479bf92e2893291dca539
- https://git.kernel.org/stable/c/d396c651e2b508b6179bb678cc029f3becbf5170
- https://git.kernel.org/stable/c/dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4b
- https://git.kernel.org/stable/c/9280ef235b05e8f19f8bc6d547b992f0a0ef398d
- https://git.kernel.org/stable/c/da8b269cc0a2526ebeaccbe2484c999eb0f822cf
Affected packages
Git /
Database specific
source
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47652.json"
unresolved_ranges
[
{
"events": [
{
"introduced": "3.2"
},
{
"fixed": "4.9.311"
}
]
},
{
"events": [
{
"introduced": "4.10"
},
{
"fixed": "4.14.276"
}
]
},
{
"events": [
{
"introduced": "4.15"
},
{
"fixed": "4.19.238"
}
]
},
{
"events": [
{
"introduced": "4.20"
},
{
"fixed": "5.4.189"
}
]
},
{
"events": [
{
"introduced": "5.5"
},
{
"fixed": "5.10.110"
}
]
},
{
"events": [
{
"introduced": "5.11"
},
{
"fixed": "5.15.33"
}
]
},
{
"events": [
{
"introduced": "5.16"
},
{
"fixed": "5.16.19"
}
]
},
{
"events": [
{
"introduced": "5.17"
},
{
"fixed": "5.17.2"
}
]
}
]