Answer in brief
CVE-2026-43134 records a High severity (CVSS 8.1) vulnerability in Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ. 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 8.1. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d <335071c0c3637064ec250481f589075db44fe4e6 || >=27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d <fa6ad76fa8623c0a50d529cd5726fa5d819a3be4 || >=27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d <9118601ff90b79e8df3c0c98f48ae00c1b02ecef || >=27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d <481ea39b342c347b6ac029f3d418486280be4e45 || >=27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d <ec91078e132179b04e0c3906b599816c056ceaad || >=27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d <96581749c7c14fbec32c35728520867929600041 || >=27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d <8dd43f9a9323f9c01bc8246da8d81a4c783c9e97 || >=27e2d4c8d28be1d1b4ecfbffab572d7dbd35254d <138d7eca445ef37a0333425d269ee59900ca1104 | 335071c0c3637064ec250481f589075db44fe4e6, fa6ad76fa8623c0a50d529cd5726fa5d819a3be4, 9118601ff90b79e8df3c0c98f48ae00c1b02ecef, 481ea39b342c347b6ac029f3d418486280be4e45, ec91078e132179b04e0c3906b599816c056ceaad, 96581749c7c14fbec32c35728520867929600041, 8dd43f9a9323f9c01bc8246da8d81a4c783c9e97, 138d7eca445ef37a0333425d269ee59900ca1104 |
| Linux/Linuxgeneric | 3.14 | Not reported |
Published upstream
May 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix missing key size check for L2CAP_LE_CONN_REQ This adds a check for encryption key size upon receiving L2CAP_LE_CONN_REQ which is required by L2CAP/LE/CFC/BV-15-C which expects L2CAP_CR_LE_BAD_KEY_SIZE.
Quoted source text, attributed separately from HOL analysis.