{"id":"CVE-2026-90019","state":"PUBLISHED","title":"usb: gadget: fix null pointer dereference in usb_put_function_instance()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: fix null pointer dereference in usb_put_function_instance()\n\nusb_put_function_instance() attempts to dereference fd inside fi struct\nto get mod in uvc_alloc_inst() error path. However, fd is not allocated\nuntil later in try_get_usb_function_instance() after allocating fi in\nuvc_alloc_inst() and thus guranteed to be null in error path. Fix this\nby adding a null check for fi->fd that returns if fd is null.","publishedAt":"2026-09-16T10:33:24.173Z","updatedAt":"2026-10-19T08:56:32.862Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2","status":"affected","lessThan":"0fc54a00954f9f4c3e3d4ffa64a530685d99a39b","versionType":"git"},{"version":"0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2","status":"affected","lessThan":"6e6736c049683380f5e20becde498986e9293ca4","versionType":"git"},{"version":"0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2","status":"affected","lessThan":"3a9691fff79bcce95338435599df6d3ae433cfdc","versionType":"git"},{"version":"0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2","status":"affected","lessThan":"7a4f4ca7ff32ae24807c83e2a06d62b13378d53c","versionType":"git"},{"version":"0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2","status":"affected","lessThan":"6ea3a073ca97716d4a73df49a3bec1c3ccf8e2a0","versionType":"git"},{"version":"0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2","status":"affected","lessThan":"d3a7fa61997db3bf6dadef4c1bd87a4fa782a817","versionType":"git"},{"version":"0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2","status":"affected","lessThan":"5117f236e9e30744338b425395d55913c4500897","versionType":"git"},{"version":"0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2","status":"affected","lessThan":"6e74ac5c596fd246e37eadfc354567179ccbe9aa","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/functions.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.9","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/functions.c"]}],"references":["https://git.kernel.org/stable/c/0fc54a00954f9f4c3e3d4ffa64a530685d99a39b","https://git.kernel.org/stable/c/6e6736c049683380f5e20becde498986e9293ca4","https://git.kernel.org/stable/c/3a9691fff79bcce95338435599df6d3ae433cfdc","https://git.kernel.org/stable/c/7a4f4ca7ff32ae24807c83e2a06d62b13378d53c","https://git.kernel.org/stable/c/6ea3a073ca97716d4a73df49a3bec1c3ccf8e2a0","https://git.kernel.org/stable/c/d3a7fa61997db3bf6dadef4c1bd87a4fa782a817","https://git.kernel.org/stable/c/5117f236e9e30744338b425395d55913c4500897","https://git.kernel.org/stable/c/6e74ac5c596fd246e37eadfc354567179ccbe9aa"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90019.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90019","state":"PUBLISHED","datePublished":"2026-09-16T10:33:24.173Z","dateUpdated":"2026-10-19T08:56:32.862Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.781Z"},"containers":{"cna":{"title":"usb: gadget: fix null pointer dereference in usb_put_function_instance()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: fix null pointer dereference in usb_put_function_instance()\n\nusb_put_function_instance() attempts to dereference fd inside fi struct\nto get mod in uvc_alloc_inst() error path. However, fd is not allocated\nuntil later in try_get_usb_function_instance() after allocating fi in\nuvc_alloc_inst() and thus guranteed to be null in error path. Fix this\nby adding a null check for fi->fd that returns if fd is null."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2","status":"affected","lessThan":"0fc54a00954f9f4c3e3d4ffa64a530685d99a39b","versionType":"git"},{"version":"0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2","status":"affected","lessThan":"6e6736c049683380f5e20becde498986e9293ca4","versionType":"git"},{"version":"0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2","status":"affected","lessThan":"3a9691fff79bcce95338435599df6d3ae433cfdc","versionType":"git"},{"version":"0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2","status":"affected","lessThan":"7a4f4ca7ff32ae24807c83e2a06d62b13378d53c","versionType":"git"},{"version":"0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2","status":"affected","lessThan":"6ea3a073ca97716d4a73df49a3bec1c3ccf8e2a0","versionType":"git"},{"version":"0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2","status":"affected","lessThan":"d3a7fa61997db3bf6dadef4c1bd87a4fa782a817","versionType":"git"},{"version":"0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2","status":"affected","lessThan":"5117f236e9e30744338b425395d55913c4500897","versionType":"git"},{"version":"0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2","status":"affected","lessThan":"6e74ac5c596fd246e37eadfc354567179ccbe9aa","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/functions.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.9","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/functions.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/0fc54a00954f9f4c3e3d4ffa64a530685d99a39b"},{"url":"https://git.kernel.org/stable/c/6e6736c049683380f5e20becde498986e9293ca4"},{"url":"https://git.kernel.org/stable/c/3a9691fff79bcce95338435599df6d3ae433cfdc"},{"url":"https://git.kernel.org/stable/c/7a4f4ca7ff32ae24807c83e2a06d62b13378d53c"},{"url":"https://git.kernel.org/stable/c/6ea3a073ca97716d4a73df49a3bec1c3ccf8e2a0"},{"url":"https://git.kernel.org/stable/c/d3a7fa61997db3bf6dadef4c1bd87a4fa782a817"},{"url":"https://git.kernel.org/stable/c/5117f236e9e30744338b425395d55913c4500897"},{"url":"https://git.kernel.org/stable/c/6e74ac5c596fd246e37eadfc354567179ccbe9aa"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:56:32.862Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.18.51"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"7.2.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}