{"id":"CVE-2026-98456","title":"Bluetooth: mgmt: fix race in read_unconf_index_list()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: mgmt: fix race in read_unconf_index_list()\n\nread_unconf_index_list() counts unconfigured controllers before allocating\nits response, then checks the device f…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 < 524e0450dd9a396f99a81b045219b0e2ea0dab57","Linux >= 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 < 8ddf962c76432a10a6cb80042875cbc48a9c056b","Linux >= 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 < 416546cd6a54e9b68f2b91bc680b1ee17dcd77a1","Linux >= 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 < 2e8bba0360d1379bfa8da47c8f5dadbb10a3fba1","Linux >= 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 < b5dbb41b212c50c095a4dbee3017a84fe94f033b","Linux 3.17"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:15:05.909Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98456","references":[{"url":"https://git.kernel.org/stable/c/524e0450dd9a396f99a81b045219b0e2ea0dab57"},{"url":"https://git.kernel.org/stable/c/8ddf962c76432a10a6cb80042875cbc48a9c056b"},{"url":"https://git.kernel.org/stable/c/416546cd6a54e9b68f2b91bc680b1ee17dcd77a1"},{"url":"https://git.kernel.org/stable/c/2e8bba0360d1379bfa8da47c8f5dadbb10a3fba1"},{"url":"https://git.kernel.org/stable/c/b5dbb41b212c50c095a4dbee3017a84fe94f033b"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.303Z","slug":"CVE-2026-98456","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: mgmt: fix race in read_unconf_index_list()\n\nread_unconf_index_list() counts unconfigured controllers before allocating\nits response, then checks the device flags again while filling it.\n\nhci_dev_list_lock stabilizes list membership, but it does not serialize the\nper-device flags. During asynchronous controller setup, the worker can set\nHCI_UNCONFIGURED and clear HCI_SETUP between the two passes. A controller\nomitted from the allocation count can then become eligible for the fill\npass, causing an out-of-bounds write to rp->index[].\n\nAllocate space for every device on hci_dev_list. Since list membership\ncannot change while hci_dev_list_lock is held, the response remains large\nenough regardless of flag transitions. The reported count and response\nlength still include only eligible unconfigured controllers.\n\n## Affected\n\n- `Linux >= 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 < 524e0450dd9a396f99a81b045219b0e2ea0dab57`\n- `Linux >= 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 < 8ddf962c76432a10a6cb80042875cbc48a9c056b`\n- `Linux >= 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 < 416546cd6a54e9b68f2b91bc680b1ee17dcd77a1`\n- `Linux >= 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 < 2e8bba0360d1379bfa8da47c8f5dadbb10a3fba1`\n- `Linux >= 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 < b5dbb41b212c50c095a4dbee3017a84fe94f033b`\n- `Linux 3.17`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}