Answer in brief
CVE-2026-53252 records a Medium severity (CVSS 5.5) vulnerability in Bluetooth: fix memory leak in error path of hci_alloc_dev(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=90dee0a0ff84fac8accd5be98412b3819f667149 <5b7dfca6f852e6b9d809fd0263b5427cc9fb33fd || >=c56b177efce8b62798e4d96bdb9867106cb7c4a0 <c016118b9e51eeaf5bc93850d4c455a3b583c0aa || >=bc0819a25e04cd68ef3568cfa51b63118fea39a7 <0622e527a31d4b44737fed5c1a2ac1fc2cfb5184 || >=ce23b73f0f27e2dbeb81734a79db710f05aa33c6 <bc2efe73c194a74839d7cf57b63880d97e21d309 || >=1d6123102e9fbedc8d25bf4731da6d513173e49e <ce4b4cac3c5749b6aa75e62e2991ae2263f2f889 || >=1d6123102e9fbedc8d25bf4731da6d513173e49e <f82799407a50af7bcacacf09cc9b279af8fe9b81 || >=1d6123102e9fbedc8d25bf4731da6d513173e49e <37b3009bf5976e8ab77c8b9a9bc3bbd7ff49e37f || dd4becd3fd4102696e1c15e6d260a1712a2d8685 || 0e5c144c557df910ab64d9c25d06399a9a735e65 || >=5.15.209 <5.15.210 || >=6.1.167 <6.1.176 || >=6.6.97 <6.6.143 || >=6.12.36 <6.12.94 || >=5.10.259 <5.11 || >=6.15.5 <6.16 | 5b7dfca6f852e6b9d809fd0263b5427cc9fb33fd, c016118b9e51eeaf5bc93850d4c455a3b583c0aa, 0622e527a31d4b44737fed5c1a2ac1fc2cfb5184, bc2efe73c194a74839d7cf57b63880d97e21d309, ce4b4cac3c5749b6aa75e62e2991ae2263f2f889, f82799407a50af7bcacacf09cc9b279af8fe9b81, 37b3009bf5976e8ab77c8b9a9bc3bbd7ff49e37f, 5.15.210, 6.1.176, 6.6.143, 6.12.94, 5.11, 6.16 |
| Linux/Linuxgeneric | 6.16 | Not reported |
Published upstream
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix memory leak in error path of hci_alloc_dev() Early failures in Bluetooth HCI UART configuration leak SRCU percpu memory. When device initialization fails before hci_register_dev() completes, the HCI_UNREGISTER flag is never set. As a result, when the device reference count reaches zero, bt_host_release() evaluates this flag as false and falls back to a direct kfree(hdev). Because hci_release_dev() is bypassed, the SRCU struct initialized early in hci_alloc_dev() is never cleaned up, resulting in a leak of percpu memory. Fix the leak by explicitly calling cleanup_srcu_struct() in the fallback (unregistered) branch of bt_host_release() before freeing the device.
Quoted source text, attributed separately from HOL analysis.