Out-of-Bounds Write Vulnerability in Semtech's LR11xx Transceiver Firmware
CVE-2026-6232

5.2MEDIUM

Key Information:

Vendor

Semtech

Status
Lr1110 Transceiver
Lr1110 Modem-e
Lr1120 Transceiver
Lr1121 Transceiver
Vendor
CVE Published:
12 October 2026

What is CVE-2026-6232?

An out-of-bounds write vulnerability exists in the SPI host command interface of Semtech's LR11xx transceiver firmware. This flaw arises when a specially crafted SPI host command with an oversized length field is processed, potentially allowing the firmware to write up to 254 bytes beyond the confines of an internal, non-persistent memory buffer. Successful exploitation of this vulnerability necessitates physical access to the device and logical access to the SPI bus, presenting significant security risks.

Affected Version(s)

LR1110 Modem-e 0 < 2.1.1

LR1110 Transceiver 0 < 0x0403

LR1120 Transceiver 0 < 0x0203

References

https://www.semtech.com/company/security/security-bulleti...

CVSS V4

Score:
5.2
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
High
Attack Vector:
Physical
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Egor (radioegor146) Koleda, https://github.com/radioegor146
.