Bluetooth: hci_conn: hold conn reference in abort_conn_sync()
Summary
| CVE | CVE-2026-74531 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-15 13:17:58 UTC |
| Updated | 2026-08-17 06:19:49 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: hold conn reference in abort_conn_sync() There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that. |
Risk And Classification
Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.001680000 probability, percentile 0.064900000 (date 2026-08-16)
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 8.8 | HIGH | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 8.8 | HIGH | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
AdjacentAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 249c88e7fb45b6b705040c5af4bd0d0f2bc9735c 64d1645f26aa49b5a86ba2fccd0bb6749ea725a6 git | Not specified |
| CNA | Linux | Linux | affected 227a0cdf4a028a73dc256d0f5144b4808d718893 963fb4b8e7d1ab07b4ae45bf15d41e667c88caca git | Not specified |
| CNA | Linux | Linux | affected 227a0cdf4a028a73dc256d0f5144b4808d718893 e8f9fef362bab431d95371d3406bc720350290c3 git | Not specified |
| CNA | Linux | Linux | affected 227a0cdf4a028a73dc256d0f5144b4808d718893 fa812cfa81aa3d4a7b6ce8277979af57b3f79712 git | Not specified |
| CNA | Linux | Linux | affected 227a0cdf4a028a73dc256d0f5144b4808d718893 5761d003daa987ac81463f570713ce9c9dd204e5 git | Not specified |
| CNA | Linux | Linux | affected 58afdc9b18871eb1d461c725be9e9f3f44a39aeb git | Not specified |
| CNA | Linux | Linux | affected 6.6.51 6.6.151 semver | Not specified |
| CNA | Linux | Linux | affected 6.10.10 6.11 semver | Not specified |
| CNA | Linux | Linux | affected 6.11 | Not specified |
| CNA | Linux | Linux | unaffected 6.11 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.151 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.103 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.44 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.8 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/fa812cfa81aa3d4a7b6ce8277979af57b3f79712 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/963fb4b8e7d1ab07b4ae45bf15d41e667c88caca | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/64d1645f26aa49b5a86ba2fccd0bb6749ea725a6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/e8f9fef362bab431d95371d3406bc720350290c3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/5761d003daa987ac81463f570713ce9c9dd204e5 | 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.