Golioth Pouch version 0.1.0, prior to commit 1b2219a1, contains a heap-based buffer overflow in BLE GATT server certificate handling. The vulnerability arises when the function server_cert_write() allocates a heap buffer of size CONFIG_POUCH_SERVER_CERT_MAX_LEN when receiving the first fragment, then appends subsequent fragments using memcpy() without verifying that sufficient capacity remains. An adjacent BLE client can send unauthenticated fragments whose combined size exceeds the allocated buffer, causing a heap overflow and crash; integrity impact is also possible due to memory corruption.
The CVSS score for this vulnerability is 7.2, indicating a high severity level. This means that organizations need to take this threat seriously, as the potential for exploitation could lead to significant impact.
Risk to organizations includes compromised integrity and availability due to the memory corruption that may occur as a result of this overflow. Given the nature of the vulnerability, organizations should prioritize patching immediately.
As of now, there is no known public exploit or proof of concept available for CVE-2026-23750. However, the underlying issues indicate that this vulnerability could be leveraged by attackers if not addressed in a timely manner.
Organizations running affected versions of Golioth Pouch should take immediate action to assess their exposure and deploy patches to mitigate risks associated with this vulnerability.
Vulnerability Details
The heap-based buffer overflow vulnerability allows attackers to exploit the system via adjacent BLE clients. The official CVE description states: This vulnerability allows for an attacker to send unauthenticated fragments that exceed the allocated buffer size.
The CVSS score of 7.2 signifies a high severity level, indicating that this vulnerability poses a considerable risk to the integrity and availability of the affected systems.
The vulnerability is classified under CWE-122, which pertains to heap-based buffer overflows. Organizations must assess their systems for this flaw and implement necessary patches.
Technical Analysis
The root cause of this vulnerability lies in the improper handling of memory allocation in the server_cert_write() function. When the first fragment is received, the function allocates a buffer of a specified size but does not check if subsequent fragments fit within that size.
The attack vector for this vulnerability is classified as adjacent, meaning an attacker must be on the same network to exploit it. The attack complexity is low, and no privileges or user interaction are required for exploitation.
The potential impacts are significant, with both integrity and availability being affected due to the possibility of memory corruption. Organizations need to closely monitor their systems for any signs of exploitation as part of their defensive strategies.
Risk & Impact Analysis
The real-world deployment risk of CVE-2026-23750 is substantial. Given the vulnerability's ability to cause memory corruption and potential system crashes, organizations operating Golioth Pouch should consider the consequences of a successful exploitation.
Organizations should assess the urgency of this vulnerability within their patch management cycles. The high CVSS score (7.2) suggests that this issue should be addressed promptly to prevent any adverse effects on service availability.
The blast radius of this vulnerability could extend to connected BLE devices and services, making it critical for organizations to implement comprehensive security measures and continuous monitoring.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch are affected. Specific impacted versions include Golioth Pouch version 0.1.0.
Mitigation & Remediation
Organizations should seek to implement the available patches from Golioth to remediate this vulnerability. If a patch is not available, they should consider implementing configuration hardening to limit the exposure of BLE services.
For continuous security, organizations may also want to engage in continuous security testing as part of their risk management strategy to uncover additional vulnerabilities.
Detection Guidance
Systems administrators should monitor for anomalous behavior in BLE communications, specifically looking for unexpected fragment sizes or patterns that may indicate a buffer overflow attempt.
Logging should include details of operations involving BLE GATT server certificate handling, as well as any integrity violations that may arise from buffer overflows.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2026-23750 lies in the growing trend of vulnerabilities related to memory management in IoT devices. As organizations increasingly deploy BLE technology, the importance of robust memory handling cannot be overstated.
This vulnerability represents a pattern of weaknesses that can lead to severe consequences if left unaddressed. Security teams must prioritize memory safety in their development processes.
Lessons learned from CVE-2026-23750 indicate that proactive measures, such as undergoing regular security assessments and engaging in vulnerability management programs, are crucial for safeguarding systems against similar vulnerabilities in the future.
In conclusion, organizations must remain vigilant in their security practices and continuously monitor for vulnerabilities like CVE-2026-23750 to protect their systems effectively.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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