{"id":"CVE-2021-47652","state":"PUBLISHED","title":"video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvideo: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe()\n\nI got a null-ptr-deref report:\n\nBUG: kernel NULL pointer dereference, address: 0000000000000000\n...\nRIP: 0010:fb_destroy_modelist+0x38/0x100\n...\nCall Trace:\n ufx_usb_probe.cold+0x2b5/0xac1 [smscufx]\n usb_probe_interface+0x1aa/0x3c0 [usbcore]\n really_probe+0x167/0x460\n...\n ret_from_fork+0x1f/0x30\n\nIf fb_alloc_cmap() fails in ufx_usb_probe(), fb_destroy_modelist() will\nbe called to destroy modelist in the error handling path. But modelist\nhas not been initialized yet, so it will result in null-ptr-deref.\n\nInitialize modelist before calling fb_alloc_cmap() to fix this bug.","publishedAt":"2025-02-26T01:54:18.089Z","updatedAt":"2026-05-11T13:58:38.576Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"d1b6a1f0c23b7164250479bf92e2893291dca539","versionType":"git"},{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"0fd28daec73525382e5c992db8743bf76e42cd5c","versionType":"git"},{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4b","versionType":"git"},{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"da8b269cc0a2526ebeaccbe2484c999eb0f822cf","versionType":"git"},{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"64ec3e678d76419f207b9cdd338dda438ca10b1c","versionType":"git"},{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"c420b540db4b5d69de0a36d8b9d9a6a79a04f05a","versionType":"git"},{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"d396c651e2b508b6179bb678cc029f3becbf5170","versionType":"git"},{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"9280ef235b05e8f19f8bc6d547b992f0a0ef398d","versionType":"git"},{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"1791f487f877a9e83d81c8677bd3e7b259e7cb27","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/video/fbdev/smscufx.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.2","versionType":"semver"},{"version":"4.9.311","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.276","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.238","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.189","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.110","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.33","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16.19","status":"unaffected","lessThanOrEqual":"5.16.*","versionType":"semver"},{"version":"5.17.2","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/video/fbdev/smscufx.c"]}],"references":["https://git.kernel.org/stable/c/d1b6a1f0c23b7164250479bf92e2893291dca539","https://git.kernel.org/stable/c/0fd28daec73525382e5c992db8743bf76e42cd5c","https://git.kernel.org/stable/c/dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4b","https://git.kernel.org/stable/c/da8b269cc0a2526ebeaccbe2484c999eb0f822cf","https://git.kernel.org/stable/c/64ec3e678d76419f207b9cdd338dda438ca10b1c","https://git.kernel.org/stable/c/c420b540db4b5d69de0a36d8b9d9a6a79a04f05a","https://git.kernel.org/stable/c/d396c651e2b508b6179bb678cc029f3becbf5170","https://git.kernel.org/stable/c/9280ef235b05e8f19f8bc6d547b992f0a0ef398d","https://git.kernel.org/stable/c/1791f487f877a9e83d81c8677bd3e7b259e7cb27"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47652.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47652","state":"PUBLISHED","datePublished":"2025-02-26T01:54:18.089Z","dateUpdated":"2026-05-11T13:58:38.576Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-02-26T01:48:21.520Z"},"containers":{"cna":{"title":"video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nvideo: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe()\n\nI got a null-ptr-deref report:\n\nBUG: kernel NULL pointer dereference, address: 0000000000000000\n...\nRIP: 0010:fb_destroy_modelist+0x38/0x100\n...\nCall Trace:\n ufx_usb_probe.cold+0x2b5/0xac1 [smscufx]\n usb_probe_interface+0x1aa/0x3c0 [usbcore]\n really_probe+0x167/0x460\n...\n ret_from_fork+0x1f/0x30\n\nIf fb_alloc_cmap() fails in ufx_usb_probe(), fb_destroy_modelist() will\nbe called to destroy modelist in the error handling path. But modelist\nhas not been initialized yet, so it will result in null-ptr-deref.\n\nInitialize modelist before calling fb_alloc_cmap() to fix this bug."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"d1b6a1f0c23b7164250479bf92e2893291dca539","versionType":"git"},{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"0fd28daec73525382e5c992db8743bf76e42cd5c","versionType":"git"},{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4b","versionType":"git"},{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"da8b269cc0a2526ebeaccbe2484c999eb0f822cf","versionType":"git"},{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"64ec3e678d76419f207b9cdd338dda438ca10b1c","versionType":"git"},{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"c420b540db4b5d69de0a36d8b9d9a6a79a04f05a","versionType":"git"},{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"d396c651e2b508b6179bb678cc029f3becbf5170","versionType":"git"},{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"9280ef235b05e8f19f8bc6d547b992f0a0ef398d","versionType":"git"},{"version":"3c8a63e22a0802fd56380f6ab305b419f18eb6f5","status":"affected","lessThan":"1791f487f877a9e83d81c8677bd3e7b259e7cb27","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/video/fbdev/smscufx.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.2","versionType":"semver"},{"version":"4.9.311","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.276","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.238","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.189","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.110","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.33","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16.19","status":"unaffected","lessThanOrEqual":"5.16.*","versionType":"semver"},{"version":"5.17.2","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/video/fbdev/smscufx.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/d1b6a1f0c23b7164250479bf92e2893291dca539"},{"url":"https://git.kernel.org/stable/c/0fd28daec73525382e5c992db8743bf76e42cd5c"},{"url":"https://git.kernel.org/stable/c/dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4b"},{"url":"https://git.kernel.org/stable/c/da8b269cc0a2526ebeaccbe2484c999eb0f822cf"},{"url":"https://git.kernel.org/stable/c/64ec3e678d76419f207b9cdd338dda438ca10b1c"},{"url":"https://git.kernel.org/stable/c/c420b540db4b5d69de0a36d8b9d9a6a79a04f05a"},{"url":"https://git.kernel.org/stable/c/d396c651e2b508b6179bb678cc029f3becbf5170"},{"url":"https://git.kernel.org/stable/c/9280ef235b05e8f19f8bc6d547b992f0a0ef398d"},{"url":"https://git.kernel.org/stable/c/1791f487f877a9e83d81c8677bd3e7b259e7cb27"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T13:58:38.576Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"4.9.311"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"4.14.276"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"4.19.238"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"5.4.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"5.10.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"5.15.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"5.16.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"5.17.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"5.18"}]}]}],"x_generator":{"engine":"bippy-1.2.0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ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2021-47652","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2025-10-01T19:50:21.892843Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-476","lang":"en","type":"CWE","description":"CWE-476 NULL Pointer Dereference"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-01T19:57:07.382Z"}}]}}}