{"id":"CVE-2026-31754","summary":"usb: cdns3: gadget: fix state inconsistency on gadget init failure","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: cdns3: gadget: fix state inconsistency on gadget init failure\n\nWhen cdns3_gadget_start() fails, the DRD hardware is left in gadget mode\nwhile software state remains INACTIVE, creating hardware/software state\ninconsistency.\n\nWhen switching to host mode via sysfs:\n  echo host \u003e /sys/class/usb_role/13180000.usb-role-switch/role\n\nThe role state is not set to CDNS_ROLE_STATE_ACTIVE due to the error,\nso cdns_role_stop() skips cleanup because state is still INACTIVE.\nThis violates the DRD controller design specification (Figure22),\nwhich requires returning to idle state before switching roles.\n\nThis leads to a synchronous external abort in xhci_gen_setup() when\nsetting up the host controller:\n\n[  516.440698] configfs-gadget 13180000.usb: failed to start g1: -19\n[  516.442035] cdns-usb3 13180000.usb: Failed to add gadget\n[  516.443278] cdns-usb3 13180000.usb: set role 2 has failed\n...\n[ 1301.375722] xhci-hcd xhci-hcd.1.auto: xHCI Host Controller\n[ 1301.377716] Internal error: synchronous external abort: 96000010 [#1] PREEMPT SMP\n[ 1301.382485] pc : xhci_gen_setup+0xa4/0x408\n[ 1301.393391] backtrace:\n    ...\n    xhci_gen_setup+0xa4/0x408    \u003c-- CRASH\n    xhci_plat_setup+0x44/0x58\n    usb_add_hcd+0x284/0x678\n    ...\n    cdns_role_set+0x9c/0xbc        \u003c-- Role switch\n\nFix by calling cdns_drd_gadget_off() in the error path to properly\nclean up the DRD gadget state.","modified":"2026-05-18T05:59:54.316873538Z","published":"2026-05-01T14:14:45.628Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31754.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/5a85599ca4d2584d89dc69f4fc49303b75a42338"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9b1d301fbae837bf6979a19030b81d869bb15f7a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b490f0e477d26d29ed51e5dc47e3b9bd31bcb49f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c32f8748d70c8fc77676ad92ed76cede17bf2c48"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c7e475ae3a5593c5db21b3b7dca4ba8bdac9b47f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cfca84f5986afceb63a3adf39d4a98e915aebbc2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fb7110a052467098967284ef14d306810b354937"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31754.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31754"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7733f6c32e36ff9d7adadf40001039bf219b1cbe"},{"fixed":"fb7110a052467098967284ef14d306810b354937"},{"fixed":"9b1d301fbae837bf6979a19030b81d869bb15f7a"},{"fixed":"cfca84f5986afceb63a3adf39d4a98e915aebbc2"},{"fixed":"c7e475ae3a5593c5db21b3b7dca4ba8bdac9b47f"},{"fixed":"5a85599ca4d2584d89dc69f4fc49303b75a42338"},{"fixed":"b490f0e477d26d29ed51e5dc47e3b9bd31bcb49f"},{"fixed":"c32f8748d70c8fc77676ad92ed76cede17bf2c48"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31754.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.4.0"},{"fixed":"5.15.203"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.168"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.134"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.81"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.22"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.12"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31754.json"}}],"schema_version":"1.7.5"}