{"id":"CVE-2026-31606","state":"PUBLISHED","title":"usb: gadget: f_hid: don't call cdev_init while cdev in use","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_hid: don't call cdev_init while cdev in use\n\nWhen calling unbind, then bind again, cdev_init reinitialized the cdev,\neven though there may still be references to it. That's the case when\nthe /dev/hidg* device is still opened. This obviously unsafe behavior\nlike oopes.\n\nThis fixes this by using cdev_alloc to put the cdev on the heap. That\nway, we can simply allocate a new one in hidg_bind.","publishedAt":"2026-04-24T14:42:28.792Z","updatedAt":"2026-10-30T12:24:27.746Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cb382536052fcc7713988869b54a81137069e5a9","status":"affected","lessThan":"92f23ab86d9524bc51dae25ed916d0e69dce5992","versionType":"git"},{"version":"cb382536052fcc7713988869b54a81137069e5a9","status":"affected","lessThan":"3aa77f5da0ecb00895411f4246d8a3e4db0343c2","versionType":"git"},{"version":"cb382536052fcc7713988869b54a81137069e5a9","status":"affected","lessThan":"c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43","versionType":"git"},{"version":"cb382536052fcc7713988869b54a81137069e5a9","status":"affected","lessThan":"eb6ef6185f2054a341ec70d7e2165f5381744215","versionType":"git"},{"version":"cb382536052fcc7713988869b54a81137069e5a9","status":"affected","lessThan":"5a229016ca3ac551294ec59770be9da94ec4bf63","versionType":"git"},{"version":"cb382536052fcc7713988869b54a81137069e5a9","status":"affected","lessThan":"75ecc46828ec377dd5692c677168ef6d64fd7123","versionType":"git"},{"version":"cb382536052fcc7713988869b54a81137069e5a9","status":"affected","lessThan":"81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/f_hid.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.19","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0.1","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","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/function/f_hid.c"]}],"references":["https://git.kernel.org/stable/c/92f23ab86d9524bc51dae25ed916d0e69dce5992","https://git.kernel.org/stable/c/3aa77f5da0ecb00895411f4246d8a3e4db0343c2","https://git.kernel.org/stable/c/c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43","https://git.kernel.org/stable/c/eb6ef6185f2054a341ec70d7e2165f5381744215","https://git.kernel.org/stable/c/5a229016ca3ac551294ec59770be9da94ec4bf63","https://git.kernel.org/stable/c/75ecc46828ec377dd5692c677168ef6d64fd7123","https://git.kernel.org/stable/c/81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d"],"weaknesses":[],"ingestedAt":"2026-10-30T12:42:04.495Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/31xxx/CVE-2026-31606.json","commit":"db8103c5921aac81d5d90efcf3745980dafabf49","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31606","state":"PUBLISHED","datePublished":"2026-04-24T14:42:28.792Z","dateUpdated":"2026-10-30T12:24:27.746Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-03-09T15:48:24.122Z"},"containers":{"cna":{"title":"usb: gadget: f_hid: don't call cdev_init while cdev in use","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_hid: don't call cdev_init while cdev in use\n\nWhen calling unbind, then bind again, cdev_init reinitialized the cdev,\neven though there may still be references to it. That's the case when\nthe /dev/hidg* device is still opened. This obviously unsafe behavior\nlike oopes.\n\nThis fixes this by using cdev_alloc to put the cdev on the heap. That\nway, we can simply allocate a new one in hidg_bind."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cb382536052fcc7713988869b54a81137069e5a9","status":"affected","lessThan":"92f23ab86d9524bc51dae25ed916d0e69dce5992","versionType":"git"},{"version":"cb382536052fcc7713988869b54a81137069e5a9","status":"affected","lessThan":"3aa77f5da0ecb00895411f4246d8a3e4db0343c2","versionType":"git"},{"version":"cb382536052fcc7713988869b54a81137069e5a9","status":"affected","lessThan":"c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43","versionType":"git"},{"version":"cb382536052fcc7713988869b54a81137069e5a9","status":"affected","lessThan":"eb6ef6185f2054a341ec70d7e2165f5381744215","versionType":"git"},{"version":"cb382536052fcc7713988869b54a81137069e5a9","status":"affected","lessThan":"5a229016ca3ac551294ec59770be9da94ec4bf63","versionType":"git"},{"version":"cb382536052fcc7713988869b54a81137069e5a9","status":"affected","lessThan":"75ecc46828ec377dd5692c677168ef6d64fd7123","versionType":"git"},{"version":"cb382536052fcc7713988869b54a81137069e5a9","status":"affected","lessThan":"81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/f_hid.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.19","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0.1","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","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/function/f_hid.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/92f23ab86d9524bc51dae25ed916d0e69dce5992"},{"url":"https://git.kernel.org/stable/c/3aa77f5da0ecb00895411f4246d8a3e4db0343c2"},{"url":"https://git.kernel.org/stable/c/c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43"},{"url":"https://git.kernel.org/stable/c/eb6ef6185f2054a341ec70d7e2165f5381744215"},{"url":"https://git.kernel.org/stable/c/5a229016ca3ac551294ec59770be9da94ec4bf63"},{"url":"https://git.kernel.org/stable/c/75ecc46828ec377dd5692c677168ef6d64fd7123"},{"url":"https://git.kernel.org/stable/c/81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:24:27.746Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"6.12.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"6.19.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"7.0.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}