Bluetooth: mgmt: fix race in read_unconf_index_list()
Summary
| CVE | CVE-2026-98456 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-18 16:16:56 UTC |
| Updated | 2026-10-24 14:16:42 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: Bluetooth: mgmt: fix race in read_unconf_index_list() read_unconf_index_list() counts unconfigured controllers before allocating its response, then checks the device flags again while filling it. hci_dev_list_lock stabilizes list membership, but it does not serialize the per-device flags. During asynchronous controller setup, the worker can set HCI_UNCONFIGURED and clear HCI_SETUP between the two passes. A controller omitted from the allocation count can then become eligible for the fill pass, causing an out-of-bounds write to rp->index[]. Allocate space for every device on hci_dev_list. Since list membership cannot change while hci_dev_list_lock is held, the response remains large enough regardless of flag transitions. The reported count and response length still include only eligible unconfigured controllers. |
Risk And Classification
Primary CVSS: v3.1 7 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 7 | HIGH | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 7 | HIGH | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
HighPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 524e0450dd9a396f99a81b045219b0e2ea0dab57 git | Not specified |
| CNA | Linux | Linux | affected 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 8ddf962c76432a10a6cb80042875cbc48a9c056b git | Not specified |
| CNA | Linux | Linux | affected 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 416546cd6a54e9b68f2b91bc680b1ee17dcd77a1 git | Not specified |
| CNA | Linux | Linux | affected 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 2e8bba0360d1379bfa8da47c8f5dadbb10a3fba1 git | Not specified |
| CNA | Linux | Linux | affected 73d1df2a7a1036a1f000e5f0ece6ade3e082b854 b5dbb41b212c50c095a4dbee3017a84fe94f033b git | Not specified |
| CNA | Linux | Linux | affected 3.17 | Not specified |
| CNA | Linux | Linux | unaffected 3.17 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.158 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.112 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.55 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.9 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/2e8bba0360d1379bfa8da47c8f5dadbb10a3fba1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b5dbb41b212c50c095a4dbee3017a84fe94f033b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/416546cd6a54e9b68f2b91bc680b1ee17dcd77a1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/8ddf962c76432a10a6cb80042875cbc48a9c056b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/524e0450dd9a396f99a81b045219b0e2ea0dab57 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.