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.
Metrics
Affected Vendors & Products
References
History
Thu, 02 Oct 2025 21:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Tue, 18 Mar 2025 19:30:00 +0000
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| First Time appeared |
Linux
Linux linux Kernel |
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| Weaknesses | CWE-476 | |
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
Thu, 27 Feb 2025 01:45:00 +0000
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|---|---|---|
| References |
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| Metrics |
threat_severity
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cvssV3_1
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Wed, 26 Feb 2025 02:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe() | |
| References |
|
|
Status: PUBLISHED
Assigner: Linux
Published: 2025-02-26T01:54:18.089Z
Updated: 2025-10-01T19:57:07.382Z
Reserved: 2025-02-26T01:48:21.520Z
Link: CVE-2021-47652
Updated: 2025-10-01T16:02:26.079Z
Status : Modified
Published: 2025-02-26T06:37:06.973
Modified: 2025-10-01T20:15:42.613
Link: CVE-2021-47652