CVE-2021-47652
video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe()
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.26% · top 82% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 – < d1b6a1f0c23b7164250479bf92e2893291dca539
- affected 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 – < 0fd28daec73525382e5c992db8743bf76e42cd5c
- affected 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 – < dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4b
- affected 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 – < da8b269cc0a2526ebeaccbe2484c999eb0f822cf
- affected 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 – < 64ec3e678d76419f207b9cdd338dda438ca10b1c
- affected 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 – < c420b540db4b5d69de0a36d8b9d9a6a79a04f05a
- affected 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 – < d396c651e2b508b6179bb678cc029f3becbf5170
- affected 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 – < 9280ef235b05e8f19f8bc6d547b992f0a0ef398d
- affected 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 – < 1791f487f877a9e83d81c8677bd3e7b259e7cb27
- affected 3.2
- unaffected < 3.2
- unaffected 4.9.311 – ≤ 4.9.*
- unaffected 4.14.276 – ≤ 4.14.*
- unaffected 4.19.238 – ≤ 4.19.*
- unaffected 5.4.189 – ≤ 5.4.*
- unaffected 5.10.110 – ≤ 5.10.*
- unaffected 5.15.33 – ≤ 5.15.*
- unaffected 5.16.19 – ≤ 5.16.*
- unaffected 5.17.2 – ≤ 5.17.*
- unaffected 5.18 – ≤ *
References (9)
- https://git.kernel.org/stable/c/d1b6a1f0c23b7164250479bf92e2893291dca539 (opens in a new tab)
- https://git.kernel.org/stable/c/0fd28daec73525382e5c992db8743bf76e42cd5c (opens in a new tab)
- https://git.kernel.org/stable/c/dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4b (opens in a new tab)
- https://git.kernel.org/stable/c/da8b269cc0a2526ebeaccbe2484c999eb0f822cf (opens in a new tab)
- https://git.kernel.org/stable/c/64ec3e678d76419f207b9cdd338dda438ca10b1c (opens in a new tab)
- https://git.kernel.org/stable/c/c420b540db4b5d69de0a36d8b9d9a6a79a04f05a (opens in a new tab)
- https://git.kernel.org/stable/c/d396c651e2b508b6179bb678cc029f3becbf5170 (opens in a new tab)
- https://git.kernel.org/stable/c/9280ef235b05e8f19f8bc6d547b992f0a0ef398d (opens in a new tab)
- https://git.kernel.org/stable/c/1791f487f877a9e83d81c8677bd3e7b259e7cb27 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-47652)Record last updated .