{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50704","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-12-24T10:53:15.518Z","datePublished":"2025-12-24T10:55:19.295Z","dateUpdated":"2026-05-11T19:23:52.960Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:23:52.960Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: gadget: Fix use-after-free during usb config switch\n\nIn the process of switching USB config from rndis to other config,\nif the hardware does not support the ->pullup callback, or the\nhardware encounters a low probability fault, both of them may cause\nthe ->pullup callback to fail, which will then cause a system panic\n(use after free).\n\nThe gadget drivers sometimes need to be unloaded regardless of the\nhardware's behavior.\n\nAnalysis as follows:\n=======================================================================\n(1) write /config/usb_gadget/g1/UDC \"none\"\n\ngether_disconnect+0x2c/0x1f8\nrndis_disable+0x4c/0x74\ncomposite_disconnect+0x74/0xb0\nconfigfs_composite_disconnect+0x60/0x7c\nusb_gadget_disconnect+0x70/0x124\nusb_gadget_unregister_driver+0xc8/0x1d8\ngadget_dev_desc_UDC_store+0xec/0x1e4\n\n(2) rm /config/usb_gadget/g1/configs/b.1/f1\n\nrndis_deregister+0x28/0x54\nrndis_free+0x44/0x7c\nusb_put_function+0x14/0x1c\nconfig_usb_cfg_unlink+0xc4/0xe0\nconfigfs_unlink+0x124/0x1c8\nvfs_unlink+0x114/0x1dc\n\n(3) rmdir /config/usb_gadget/g1/functions/rndis.gs4\n\npanic+0x1fc/0x3d0\ndo_page_fault+0xa8/0x46c\ndo_mem_abort+0x3c/0xac\nel1_sync_handler+0x40/0x78\n0xffffff801138f880\nrndis_close+0x28/0x34\neth_stop+0x74/0x110\ndev_close_many+0x48/0x194\nrollback_registered_many+0x118/0x814\nunregister_netdev+0x20/0x30\ngether_cleanup+0x1c/0x38\nrndis_attr_release+0xc/0x14\nkref_put+0x74/0xb8\nconfigfs_rmdir+0x314/0x374\n\nIf gadget->ops->pullup() return an error, function rndis_close() will be\ncalled, then it will causes a use-after-free problem.\n======================================================================="}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/udc/core.c"],"versions":[{"version":"0a55187a1ec8c03d0619e7ce41d10fdc39cff036","lessThan":"30e926aa835ac2e6ad05822e4cb75833feb0d99f","status":"affected","versionType":"git"},{"version":"0a55187a1ec8c03d0619e7ce41d10fdc39cff036","lessThan":"99a58ac42d9b6911834b0224b6782aea0c311346","status":"affected","versionType":"git"},{"version":"0a55187a1ec8c03d0619e7ce41d10fdc39cff036","lessThan":"afdc12887f2b2ecf20d065a7d81ad29824155083","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/udc/core.c"],"versions":[{"version":"4.20","status":"affected"},{"version":"0","lessThan":"4.20","status":"unaffected","versionType":"semver"},{"version":"6.0.16","lessThanOrEqual":"6.0.*","status":"unaffected","versionType":"semver"},{"version":"6.1.2","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2","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":"4.20","versionEndExcluding":"6.0.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.1.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/30e926aa835ac2e6ad05822e4cb75833feb0d99f"},{"url":"https://git.kernel.org/stable/c/99a58ac42d9b6911834b0224b6782aea0c311346"},{"url":"https://git.kernel.org/stable/c/afdc12887f2b2ecf20d065a7d81ad29824155083"}],"title":"USB: gadget: Fix use-after-free during usb config switch","x_generator":{"engine":"bippy-1.2.0"}}}}