{"id":"CVE-2026-31755","state":"PUBLISHED","title":"usb: cdns3: gadget: fix NULL pointer dereference in ep_queue","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: cdns3: gadget: fix NULL pointer dereference in ep_queue\n\nWhen the gadget endpoint is disabled or not yet configured, the ep->desc\npointer can be NULL. This leads to a NULL pointer dereference when\n__cdns3_gadget_ep_queue() is called, causing a kernel crash.\n\nAdd a check to return -ESHUTDOWN if ep->desc is NULL, which is the\nstandard return code for unconfigured endpoints.\n\nThis prevents potential crashes when ep_queue is called on endpoints\nthat are not ready.","publishedAt":"2026-05-01T14:14:46.288Z","updatedAt":"2026-07-04T11:50:33.684Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7733f6c32e36ff9d7adadf40001039bf219b1cbe","status":"affected","lessThan":"3cf0580a09d417eab41ce914a11f9cde3a121871","versionType":"git"},{"version":"7733f6c32e36ff9d7adadf40001039bf219b1cbe","status":"affected","lessThan":"3d1433fe34b224b90259e207e5389e95b504ef04","versionType":"git"},{"version":"7733f6c32e36ff9d7adadf40001039bf219b1cbe","status":"affected","lessThan":"fb2ad0c1334a3eccfe4ed203f9eef5a4879226f6","versionType":"git"},{"version":"7733f6c32e36ff9d7adadf40001039bf219b1cbe","status":"affected","lessThan":"9ab9b0e5fcdac325f950fc8b6caa08a9e22a0db9","versionType":"git"},{"version":"7733f6c32e36ff9d7adadf40001039bf219b1cbe","status":"affected","lessThan":"d61446dfc9d387775bb1b95b081953201b9222af","versionType":"git"},{"version":"7733f6c32e36ff9d7adadf40001039bf219b1cbe","status":"affected","lessThan":"390536cc6af4ca5566bc3bf1f8b704700380cd2c","versionType":"git"},{"version":"7733f6c32e36ff9d7adadf40001039bf219b1cbe","status":"affected","lessThan":"14bf08ab2cdfcdfd3f13e799d06692a1b3e0745f","versionType":"git"},{"version":"7733f6c32e36ff9d7adadf40001039bf219b1cbe","status":"affected","lessThan":"7f6f127b9bc34bed35f56faf7ecb1561d6b39000","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/cdns3/cdns3-gadget.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.4","versionType":"semver"},{"version":"5.10.260","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.203","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.168","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.134","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.81","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.22","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.12","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/cdns3/cdns3-gadget.c"]}],"references":["https://git.kernel.org/stable/c/3cf0580a09d417eab41ce914a11f9cde3a121871","https://git.kernel.org/stable/c/3d1433fe34b224b90259e207e5389e95b504ef04","https://git.kernel.org/stable/c/fb2ad0c1334a3eccfe4ed203f9eef5a4879226f6","https://git.kernel.org/stable/c/9ab9b0e5fcdac325f950fc8b6caa08a9e22a0db9","https://git.kernel.org/stable/c/d61446dfc9d387775bb1b95b081953201b9222af","https://git.kernel.org/stable/c/390536cc6af4ca5566bc3bf1f8b704700380cd2c","https://git.kernel.org/stable/c/14bf08ab2cdfcdfd3f13e799d06692a1b3e0745f","https://git.kernel.org/stable/c/7f6f127b9bc34bed35f56faf7ecb1561d6b39000"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/31xxx/CVE-2026-31755.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31755","state":"PUBLISHED","datePublished":"2026-05-01T14:14:46.288Z","dateUpdated":"2026-07-04T11:50:33.684Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-03-09T15:48:24.139Z"},"containers":{"cna":{"title":"usb: cdns3: gadget: fix NULL pointer dereference in ep_queue","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: cdns3: gadget: fix NULL pointer dereference in ep_queue\n\nWhen the gadget endpoint is disabled or not yet configured, the ep->desc\npointer can be NULL. This leads to a NULL pointer dereference when\n__cdns3_gadget_ep_queue() is called, causing a kernel crash.\n\nAdd a check to return -ESHUTDOWN if ep->desc is NULL, which is the\nstandard return code for unconfigured endpoints.\n\nThis prevents potential crashes when ep_queue is called on endpoints\nthat are not ready."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7733f6c32e36ff9d7adadf40001039bf219b1cbe","status":"affected","lessThan":"3cf0580a09d417eab41ce914a11f9cde3a121871","versionType":"git"},{"version":"7733f6c32e36ff9d7adadf40001039bf219b1cbe","status":"affected","lessThan":"3d1433fe34b224b90259e207e5389e95b504ef04","versionType":"git"},{"version":"7733f6c32e36ff9d7adadf40001039bf219b1cbe","status":"affected","lessThan":"fb2ad0c1334a3eccfe4ed203f9eef5a4879226f6","versionType":"git"},{"version":"7733f6c32e36ff9d7adadf40001039bf219b1cbe","status":"affected","lessThan":"9ab9b0e5fcdac325f950fc8b6caa08a9e22a0db9","versionType":"git"},{"version":"7733f6c32e36ff9d7adadf40001039bf219b1cbe","status":"affected","lessThan":"d61446dfc9d387775bb1b95b081953201b9222af","versionType":"git"},{"version":"7733f6c32e36ff9d7adadf40001039bf219b1cbe","status":"affected","lessThan":"390536cc6af4ca5566bc3bf1f8b704700380cd2c","versionType":"git"},{"version":"7733f6c32e36ff9d7adadf40001039bf219b1cbe","status":"affected","lessThan":"14bf08ab2cdfcdfd3f13e799d06692a1b3e0745f","versionType":"git"},{"version":"7733f6c32e36ff9d7adadf40001039bf219b1cbe","status":"affected","lessThan":"7f6f127b9bc34bed35f56faf7ecb1561d6b39000","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/cdns3/cdns3-gadget.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.4","versionType":"semver"},{"version":"5.10.260","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.203","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.168","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.134","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.81","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.22","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.12","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/cdns3/cdns3-gadget.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/3cf0580a09d417eab41ce914a11f9cde3a121871"},{"url":"https://git.kernel.org/stable/c/3d1433fe34b224b90259e207e5389e95b504ef04"},{"url":"https://git.kernel.org/stable/c/fb2ad0c1334a3eccfe4ed203f9eef5a4879226f6"},{"url":"https://git.kernel.org/stable/c/9ab9b0e5fcdac325f950fc8b6caa08a9e22a0db9"},{"url":"https://git.kernel.org/stable/c/d61446dfc9d387775bb1b95b081953201b9222af"},{"url":"https://git.kernel.org/stable/c/390536cc6af4ca5566bc3bf1f8b704700380cd2c"},{"url":"https://git.kernel.org/stable/c/14bf08ab2cdfcdfd3f13e799d06692a1b3e0745f"},{"url":"https://git.kernel.org/stable/c/7f6f127b9bc34bed35f56faf7ecb1561d6b39000"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-07-04T11:50:33.684Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.10.260"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.1.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.6.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.12.81"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.18.22"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.19.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}