{"id":"CVE-2026-93054","revision":"4e93634c71734c42a0de59fe5f5d32b5","records":[{"revision":"4e93634c71734c42a0de59fe5f5d32b5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93054","aliases":[],"title":"uio: Fix stale info pointer in failed registration path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nuio: Fix stale info pointer in failed registration path\n\nAfter device_add(), the UIO device is visible to userspace and /dev/uioX\ncan be opened. If a later setup step fails, __uio_register_device()\nunwinds the device but leaves idev->info pointing at the caller-owned\nstruct uio_info.\n\nThat is unsafe when an opener races with the failed registration path.\nThe open file keeps a reference to the uio_device, while the caller sees\nregistration failure and may free its struct uio_info. Later file\noperations can then follow idev->info and dereference freed memory.\n\nHandle post-device_add() failures like unregister: remove UIO attributes\nwhile the info pointer is still valid, then clear idev->info under\ninfo_lock and wake existing waiters/async users before removing the\ndevice and minor. This makes already-open file descriptors observe the\nsame \"device gone\" state as normal uio_unregister_device().","state":0,"publishedAt":"2026-09-17T16:10:43.104+00:00","modifiedAt":"2026-10-19T09:04:49.183+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/uio/uio.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"a93e7b331568227500186a465fee3c2cb5dffd1f\",\n                            \"lessThan\": \"63eaa7663335d482a8825c231213e312cacea567\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a93e7b331568227500186a465fee3c2cb5dffd1f\",\n                            \"lessThan\": \"df4faf65194ec6c315a59be4c6749eaeb3009243\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a93e7b331568227500186a465fee3c2cb5dffd1f\",\n                            \"lessThan\": \"506b43dde5f9ac0068b1360e6b5dbee07fda59fb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a93e7b331568227500186a465fee3c2cb5dffd1f\",\n                            \"lessThan\": \"15340b00e665af805523b08515294a1aa1778151\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a93e7b331568227500186a465fee3c2cb5dffd1f\",\n                            \"lessThan\": \"234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a93e7b331568227500186a465fee3c2cb5dffd1f\",\n                            \"lessThan\": \"16695e9059d80ea6661e8399064b0c01f641dd8c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a93e7b331568227500186a465fee3c2cb5dffd1f\",\n                            \"lessThan\": \"ec5bd6731183eb6f619140c9bef2ee11ed818c20\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a93e7b331568227500186a465fee3c2cb5dffd1f\",\n                            \"lessThan\": \"67b6fc084b034a91c3ec7907a3fed89a2450f30b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"085d735c858934e5d5bfaedb1fc98bd9135e6ff1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4.14.100\",\n                            \"lessThan\": \"4.15\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/uio/uio.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.18\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.18\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/63eaa7663335d482a8825c231213e312cacea567","https://git.kernel.org/stable/c/df4faf65194ec6c315a59be4c6749eaeb3009243","https://git.kernel.org/stable/c/506b43dde5f9ac0068b1360e6b5dbee07fda59fb","https://git.kernel.org/stable/c/15340b00e665af805523b08515294a1aa1778151","https://git.kernel.org/stable/c/234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac","https://git.kernel.org/stable/c/16695e9059d80ea6661e8399064b0c01f641dd8c","https://git.kernel.org/stable/c/ec5bd6731183eb6f619140c9bef2ee11ed818c20","https://git.kernel.org/stable/c/67b6fc084b034a91c3ec7907a3fed89a2450f30b"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93054","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93054","identifiers":["CVE-2026-93054"]},"retained":false,"historicalAffected":[]}],"coverage":[]}