Answer in brief
CVE-2026-53255 records a High severity (CVSS 7.1) vulnerability in Bluetooth: MGMT: validate advertising TLV before type checks. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (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 7.1. 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), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=2bb36870e8cb29949ef9acec37129cd8e70f1857 <13ad995071a06570668dd8daab3616c247c72080 || >=2bb36870e8cb29949ef9acec37129cd8e70f1857 <06fcbd79c3c360a50f9be9d370769bbd738d0976 || >=2bb36870e8cb29949ef9acec37129cd8e70f1857 <f7093ac233c1e7f51d125534f46067772a113175 || >=2bb36870e8cb29949ef9acec37129cd8e70f1857 <74c08e4db35a476c3462aeb65846f955be732626 || >=2bb36870e8cb29949ef9acec37129cd8e70f1857 <18fea1cb0c2599752e908c8217490f73ddd33e00 || >=2bb36870e8cb29949ef9acec37129cd8e70f1857 <1a3c8ffbb469859b076445af44bdfa6a711d483e || >=2bb36870e8cb29949ef9acec37129cd8e70f1857 <2a3f3ed9e198ae23c15859ace2f9ca6cfdc35b57 || >=2bb36870e8cb29949ef9acec37129cd8e70f1857 <de23fb62259aa01d294f77238ae3b835eb674413 | 13ad995071a06570668dd8daab3616c247c72080, 06fcbd79c3c360a50f9be9d370769bbd738d0976, f7093ac233c1e7f51d125534f46067772a113175, 74c08e4db35a476c3462aeb65846f955be732626, 18fea1cb0c2599752e908c8217490f73ddd33e00, 1a3c8ffbb469859b076445af44bdfa6a711d483e, 2a3f3ed9e198ae23c15859ace2f9ca6cfdc35b57, de23fb62259aa01d294f77238ae3b835eb674413 |
| Linux/Linuxgeneric | 4.9 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 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: MGMT: validate advertising TLV before type checks tlv_data_is_valid() reads each advertising data field length from data[i], then inspects data[i + 1] for managed EIR types before checking that the current field still fits inside the supplied buffer. A malformed field whose length byte is the last byte of the buffer can therefore make the parser read one byte past the advertising data. KASAN reported the following when a malformed MGMT_OP_ADD_ADVERTISING request reached that path: BUG: KASAN: vmalloc-out-of-bounds in tlv_data_is_valid() Read of size 1 Call trace: tlv_data_is_valid() add_advertising() hci_mgmt_cmd() hci_sock_sendmsg() Move the existing element-length check before any type-octet inspection so each non-empty element is proven to contain its type byte before the parser looks at data[i + 1].
Quoted source text, attributed separately from HOL analysis.