{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-46904", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-25T13:45:52.716Z", "datePublished": "2024-02-25T14:03:40.319Z", "dateUpdated": "2026-05-11T13:44:09.016Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:44:09.016Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hso: fix null-ptr-deref during tty device unregistration\n\nMultiple ttys try to claim the same the minor number causing a double\nunregistration of the same device. The first unregistration succeeds\nbut the next one results in a null-ptr-deref.\n\nThe get_free_serial_index() function returns an available minor number\nbut doesn't assign it immediately. The assignment is done by the caller\nlater. But before this assignment, calls to get_free_serial_index()\nwould return the same minor number.\n\nFix this by modifying get_free_serial_index to assign the minor number\nimmediately after one is found to be and rename it to obtain_minor()\nto better reflect what it does. Similary, rename set_serial_by_index()\nto release_minor() and modify it to free up the minor number of the\ngiven hso_serial. Every obtain_minor() should have corresponding\nrelease_minor() call." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/usb/hso.c" ], "versions": [ { "version": "72dc1c096c7051a48ab1dbb12f71976656b55eb5", "lessThan": "a462067d7c8e6953a733bf5ade8db947b1bb5449", "status": "affected", "versionType": "git" }, { "version": "72dc1c096c7051a48ab1dbb12f71976656b55eb5", "lessThan": "145c89c441d27696961752bf51b323f347601bee", "status": "affected", "versionType": "git" }, { "version": "72dc1c096c7051a48ab1dbb12f71976656b55eb5", "lessThan": "caf5ac93b3b5d5fac032fc11fbea680e115421b4", "status": "affected", "versionType": "git" }, { "version": "72dc1c096c7051a48ab1dbb12f71976656b55eb5", "lessThan": "92028d7a31e55d53e41cff679156b9432cffcb36", "status": "affected", "versionType": "git" }, { "version": "72dc1c096c7051a48ab1dbb12f71976656b55eb5", "lessThan": "4a2933c88399c0ebc738db39bbce3ae89786d723", "status": "affected", "versionType": "git" }, { "version": "72dc1c096c7051a48ab1dbb12f71976656b55eb5", "lessThan": "dc195928d7e4ec7b5cfc6cd10dc4c8d87a7c72ac", "status": "affected", "versionType": "git" }, { "version": "72dc1c096c7051a48ab1dbb12f71976656b55eb5", "lessThan": "388d05f70f1ee0cac4a2068fd295072f1a44152a", "status": "affected", "versionType": "git" }, { "version": "72dc1c096c7051a48ab1dbb12f71976656b55eb5", "lessThan": "8a12f8836145ffe37e9c8733dce18c22fb668b66", "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/net/usb/hso.c" ], "versions": [ { "version": "2.6.27", "status": "affected" }, { "version": "0", "lessThan": "2.6.27", "status": "unaffected", "versionType": "semver" }, { "version": "4.4.268", "lessThanOrEqual": "4.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.268", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.232", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.187", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.112", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.30", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.11.14", "lessThanOrEqual": "5.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.12", "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": "2.6.27", "versionEndExcluding": "4.4.268" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "4.9.268" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "4.14.232" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "4.19.187" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "5.4.112" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "5.10.30" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "5.11.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "5.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/a462067d7c8e6953a733bf5ade8db947b1bb5449" }, { "url": "https://git.kernel.org/stable/c/145c89c441d27696961752bf51b323f347601bee" }, { "url": "https://git.kernel.org/stable/c/caf5ac93b3b5d5fac032fc11fbea680e115421b4" }, { "url": "https://git.kernel.org/stable/c/92028d7a31e55d53e41cff679156b9432cffcb36" }, { "url": "https://git.kernel.org/stable/c/4a2933c88399c0ebc738db39bbce3ae89786d723" }, { "url": "https://git.kernel.org/stable/c/dc195928d7e4ec7b5cfc6cd10dc4c8d87a7c72ac" }, { "url": "https://git.kernel.org/stable/c/388d05f70f1ee0cac4a2068fd295072f1a44152a" }, { "url": "https://git.kernel.org/stable/c/8a12f8836145ffe37e9c8733dce18c22fb668b66" } ], "title": "net: hso: fix null-ptr-deref during tty device unregistration", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-07-25T17:47:17.588165Z", "id": "CVE-2021-46904", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-25T17:47:30.417Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:17:42.846Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/a462067d7c8e6953a733bf5ade8db947b1bb5449", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/145c89c441d27696961752bf51b323f347601bee", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/caf5ac93b3b5d5fac032fc11fbea680e115421b4", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/92028d7a31e55d53e41cff679156b9432cffcb36", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/4a2933c88399c0ebc738db39bbce3ae89786d723", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/dc195928d7e4ec7b5cfc6cd10dc4c8d87a7c72ac", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/388d05f70f1ee0cac4a2068fd295072f1a44152a", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/8a12f8836145ffe37e9c8733dce18c22fb668b66", "tags": [ "x_transferred" ] } ] } ] } }