{"id":"CVE-2026-90257","revision":"1d62780834804dc59fc0401e16a3613b","records":[{"revision":"1d62780834804dc59fc0401e16a3613b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90257","aliases":[],"title":"Bluetooth: virtio_bt: avoid OOB read of build info string","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: virtio_bt: avoid OOB read of build info string\n\nThe virtbt_setup_zephyr() sends the Zephyr vendor command 0xfc08 (Read\nBuild Information) and hands the response to bt_dev_info() and\nhci_set_fw_info() as a \"%s\" string starting at skb->data + 1, without\nchecking the length. A backend that answers with status only leaves that\npointer past the end of the received data, so the walk reads adjacent\nslab memory until it meets a NUL. Those bytes reach the kernel log and\nthe firmware-info debugfs file.\n\nTo fix this, print the string with a bounded \"%.*s\" limited to\nskb->len - 1. A short or unterminated response then prints as much as\narrived instead of failing setup.\n\nThis mirrors commit dd068ef04412 (\"Bluetooth: bpa10x: avoid OOB read of\nrevision string in bpa10x_setup()\"), which fixed the identical pattern.","state":0,"publishedAt":"2026-09-17T16:07:56.089+00:00","modifiedAt":"2026-10-19T09:00:33.856+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/bluetooth/virtio_bt.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"afd2daa26c7abd734d78bd274fc6c59a15e61063\",\n                            \"lessThan\": \"fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"afd2daa26c7abd734d78bd274fc6c59a15e61063\",\n                            \"lessThan\": \"d08c99abf06133a7829d46627e77e3315ca974d2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"afd2daa26c7abd734d78bd274fc6c59a15e61063\",\n                            \"lessThan\": \"0e388d805233a883a31271676eae6031dfc9e898\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"afd2daa26c7abd734d78bd274fc6c59a15e61063\",\n                            \"lessThan\": \"54e9387eb7546eaa6f600220599d55740956ffc3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"afd2daa26c7abd734d78bd274fc6c59a15e61063\",\n                            \"lessThan\": \"be1e3df2c49c91b0a052c6563884e8d39bd768b2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"afd2daa26c7abd734d78bd274fc6c59a15e61063\",\n                            \"lessThan\": \"84ea9c99874804f5ca13f35bbc186ba93902f30f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"afd2daa26c7abd734d78bd274fc6c59a15e61063\",\n                            \"lessThan\": \"502adc06ba76dee19c292ae4a07d74d202fe734d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\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/bluetooth/virtio_bt.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.13\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.13\",\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":[],"references":["https://git.kernel.org/stable/c/fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e","https://git.kernel.org/stable/c/d08c99abf06133a7829d46627e77e3315ca974d2","https://git.kernel.org/stable/c/0e388d805233a883a31271676eae6031dfc9e898","https://git.kernel.org/stable/c/54e9387eb7546eaa6f600220599d55740956ffc3","https://git.kernel.org/stable/c/be1e3df2c49c91b0a052c6563884e8d39bd768b2","https://git.kernel.org/stable/c/84ea9c99874804f5ca13f35bbc186ba93902f30f","https://git.kernel.org/stable/c/502adc06ba76dee19c292ae4a07d74d202fe734d"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90257","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90257","identifiers":["CVE-2026-90257"]},"retained":false,"historicalAffected":[]}],"coverage":[]}