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TI-2026-71207 Aliases CVE-2026-6232GHSA-p9mw-jx6h-2wjg

Out-of-bounds write in Semtech LR11xx transceiver firmware

Priority LOW 25CWE-787Published · Updated

Key facts

Attack vector
Physical
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Semtech LR1110, LR1120 and LR1121 transceiver firmware and the LR1110 and LR1121 Modem-e firmware are affected. A crafted SPI host command with an oversized length field can write up to 254 bytes past an internal, non-persistent memory buffer (CWE-787). An attacker needs physical access to the device and logical access to the SPI bus.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

An out-of-bounds write vulnerability in the SPI host command interface of Semtech's LR11xx transceiver firmware where a crafted SPI host command with an oversized length field can cause the firmware to write up to 254 arbitrary bytes past the bounds of an internal, non-persistent memory buffer. Exploitation requires physical access to the device and logical access to the SPI bus.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00167 5th percentileScored 2026-11-07
Fix Fixed LR1110 Transceiver (Semtech): 0x0403, A1_0303LR1110 Modem-e (Semtech): 2.1.1+3 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SemtechLR1110 Transceiverbefore 0x04030x0403, A1_0303Patch availableCNA
SemtechLR1110 Modem-ebefore 2.1.12.1.1Patch availableCNA
SemtechLR1120 Transceiverbefore 0x02030x0203, A2_0101Patch availableCNA
SemtechLR1121 Transceiverbefore 0x01050x0105, A3_0101Patch availableCNA
SemtechLR1121 Modem-ebefore 2.1.12.1.1Patch availableCNA
  • LR1110 Transceiver VendorSemtech Affected before 0x0403 Fixed in 0x0403, A1_0303 Patch available CNA
  • LR1110 Modem-e VendorSemtech Affected before 2.1.1 Fixed in 2.1.1 Patch available CNA
  • LR1120 Transceiver VendorSemtech Affected before 0x0203 Fixed in 0x0203, A2_0101 Patch available CNA
  • LR1121 Transceiver VendorSemtech Affected before 0x0105 Fixed in 0x0105, A3_0101 Patch available CNA
  • LR1121 Modem-e VendorSemtech Affected before 2.1.1 Fixed in 2.1.1 Patch available CNA

Remediation

Update the LR1110 Transceiver to 0x0403 or A1_0303, the LR1120 Transceiver to 0x0203 or A2_0101, and the LR1121 Transceiver to 0x0105 or A3_0101. Update the LR1110 Modem-e and the LR1121 Modem-e to 2.1.1.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA LR1110 Transceiver (Semtech) Fixed in 0x0403, A1_0303
  • Fix · CNA LR1110 Modem-e (Semtech) Fixed in 2.1.1
  • Fix · CNA LR1120 Transceiver (Semtech) Fixed in 0x0203, A2_0101
  • Fix · CNA LR1121 Transceiver (Semtech) Fixed in 0x0105, A3_0101
  • Fix · CNA LR1121 Modem-e (Semtech) Fixed in 2.1.1

Timeline

  1. 2026-10-12 Threatist record created from CVE-2026-6232
  2. 2026-10-12 Alias added: GHSA-p9mw-jx6h-2wjg
  3. 2026-10-16 CISA SSVC decision points changed

References

Other 1

  • TI-2022-18650 Buffer Overflow in `ProcessRadioRxDone` in LoRaMac-node CVSS 3.1CRITICAL 9.8
  • TI-2020-08942 Potential Buffer Overflow in LoRaMac-node CVSS 3.1HIGH 8.8
  • TI-2025-13554 Semtech LR11xx Secure Boot Bypass CVSS 4.0HIGH 7.0
  • TI-2025-13552 Semtech LR11xx Memory Write Access Control Bypass CVSS 4.0MEDIUM 5.4
  • TI-2020-03545 Use After Free in in cups_update_info in LoRa Basics Station CVSS 3.1MEDIUM 5.0
  • TI-2025-13553 Semtech LR11xx Encrypted Firmware Disclosure CVSS 4.0MEDIUM 5.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences