Vulnerability-Lookup

GHSA-XJJJ-2993-4G39

Vulnerability from github – Published: 2026-04-07 21:32 – Updated: 2026-04-07 21:32

Details

An improper access control vulnerability exists in Semtech LoRa LR11xxx transceivers running early versions of firmware where the memory write command accessible via the physical SPI interface fails to enforce write protection on the program call stack. An attacker with physical access to the SPI interface can overwrite stack memory to hijack program control flow and achieve limited arbitrary code execution. However, the impact is limited to the active attack session: the device's secure boot mechanism prevents persistent firmware modification, the crypto engine isolates cryptographic keys from direct firmware access, and all modifications are lost upon device reboot or loss of physical access.

Severity

5.4 (Medium)


                  
                    CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/AU:N/R:A/V:D/RE:M

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  "affected": [],
  "aliases": [
    "CVE-2025-14857"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-123"
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-07T20:16:21Z",
    "severity": "MODERATE"
  },
  "details": "An improper access control vulnerability exists in Semtech LoRa LR11xxx transceivers running early versions of firmware where the memory write command accessible via the physical SPI interface fails to enforce write protection on the program call stack. An attacker with physical access to the SPI interface can overwrite stack memory to hijack program control flow and achieve limited arbitrary code execution. However, the impact is limited to the active attack session: the device\u0027s secure boot mechanism prevents persistent firmware modification, the crypto engine isolates cryptographic keys from direct firmware access, and all modifications are lost upon device reboot or loss of physical access.",
  "id": "GHSA-xjjj-2993-4g39",
  "modified": "2026-04-07T21:32:39Z",
  "published": "2026-04-07T21:32:39Z",
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    {
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    },
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      "type": "WEB",
      "url": "https://www.semtech.com/company/security/security-bulletins/sem-psa-2026-001"
    }
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  "schema_version": "1.4.0",
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      "score": "CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:A/V:D/RE:M/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2025-14857 (GCVE-0-2025-14857)

Vulnerability from cvelistv5 – Published: 2026-04-07 19:56 – Updated: 2026-04-07 20:42

Title

Semtech LR11xx Memory Write Access Control Bypass

Summary

Severity

5.4 (Medium)


                        
                          CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/AU:N/R:A/V:D/RE:M

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-07 20:31 UTC

CWE

CWE-123 - Write-what-where Condition

Assigner

SWI

References

1 reference

URL	Tags
https://www.semtech.com/company/security/security…

Impacted products

3 products

Vendor	Product	Version
Semtech	LR1110	Affected: 0 , < TRX FW 0x0402 (custom) cpe:2.3:a:semtech:lr1110::::::::
Semtech	LR1120	Affected: 0 , < TRX FW 0x0202 (custom) cpe:2.3:a:semtech:lr1120::::::::
Semtech	LR1121	Affected: 0 , < TRX FW 0x0104 (custom) cpe:2.3:a:semtech:lr1121::::::::

Date Public

2026-04-06 18:07

Credits

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

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JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.