{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64347","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-19T15:36:31.782Z","datePublished":"2026-07-25T08:50:08.338Z","dateUpdated":"2026-08-17T04:53:52.339Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-17T04:53:52.339Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: composite: fix dead empty check in the USB_DT_OTG handler\n\nThe OTG branch of composite_setup() falls back to the first\nconfiguration when none is selected:\n\n\tif (cdev->config)\n\t\tconfig = cdev->config;\n\telse\n\t\tconfig = list_first_entry(&cdev->configs,\n\t\t\t\t\t  struct usb_configuration, list);\n\tif (!config)\n\t\tgoto done;\n\t...\n\tmemcpy(req->buf, config->descriptors[0], value);\n\nlist_first_entry() never returns NULL. On an empty list it returns\ncontainer_of() of the list head. So the \"if (!config)\" check is dead.\n\nWhen cdev->configs is empty, config points at the head inside struct\nusb_composite_dev. config->descriptors[0] reads whatever sits at that\noffset. The memcpy copies up to w_length bytes of it into the response\nbuffer.\n\ncdev->configs can be empty in two cases. One is a teardown race on\ngadget unbind with a control transfer in flight. The other is a driver\nthat sets is_otg before it adds a config. A reproducer that holds\ncdev->configs empty triggers a KASAN fault in this branch.\n\nUse list_first_entry_or_null() so the existing check does its job."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/composite.c"],"versions":[{"version":"53e6242db8d60da0587d36951cc9434d1a1c21dd","lessThan":"2454264b2ab4cf0055c0bfd39e79f830452bd0db","status":"affected","versionType":"git"},{"version":"53e6242db8d60da0587d36951cc9434d1a1c21dd","lessThan":"d3e72cfef2e38bd588055739a8100d14f9773b17","status":"affected","versionType":"git"},{"version":"53e6242db8d60da0587d36951cc9434d1a1c21dd","lessThan":"8ac463fe6c0f85bdb1ce8c30e8c9e060802e4483","status":"affected","versionType":"git"},{"version":"53e6242db8d60da0587d36951cc9434d1a1c21dd","lessThan":"56add2b9b2e89ec61c0761165d758f73004fdfdf","status":"affected","versionType":"git"},{"version":"53e6242db8d60da0587d36951cc9434d1a1c21dd","lessThan":"91b3ecd34b60f950c50c560974945b6596a6f207","status":"affected","versionType":"git"},{"version":"53e6242db8d60da0587d36951cc9434d1a1c21dd","lessThan":"01feaf024f29618d5ffa7ab0fd858e0579dcbf7b","status":"affected","versionType":"git"},{"version":"53e6242db8d60da0587d36951cc9434d1a1c21dd","lessThan":"fcb21bf747640c9d6bd1eda9da85420f076d59c1","status":"affected","versionType":"git"},{"version":"53e6242db8d60da0587d36951cc9434d1a1c21dd","lessThan":"f8f680609c2b3ab795ffcd6f21585b6dfc46d395","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/composite.c"],"versions":[{"version":"4.3","status":"affected"},{"version":"0","lessThan":"4.3","status":"unaffected","versionType":"semver"},{"version":"5.10.261","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.212","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.178","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.96","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.39","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.4","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"6.12.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/2454264b2ab4cf0055c0bfd39e79f830452bd0db"},{"url":"https://git.kernel.org/stable/c/d3e72cfef2e38bd588055739a8100d14f9773b17"},{"url":"https://git.kernel.org/stable/c/8ac463fe6c0f85bdb1ce8c30e8c9e060802e4483"},{"url":"https://git.kernel.org/stable/c/56add2b9b2e89ec61c0761165d758f73004fdfdf"},{"url":"https://git.kernel.org/stable/c/91b3ecd34b60f950c50c560974945b6596a6f207"},{"url":"https://git.kernel.org/stable/c/01feaf024f29618d5ffa7ab0fd858e0579dcbf7b"},{"url":"https://git.kernel.org/stable/c/fcb21bf747640c9d6bd1eda9da85420f076d59c1"},{"url":"https://git.kernel.org/stable/c/f8f680609c2b3ab795ffcd6f21585b6dfc46d395"}],"title":"usb: gadget: composite: fix dead empty check in the USB_DT_OTG handler","x_generator":{"engine":"bippy-1.2.0"}}}}