Zephyr

14 CVEs product

Monthly

CVE-2026-1678 CRITICAL POC Act Now

Buffer overflow in Zephyr RTOS dns_unpack_name() function causing OOB writes. PoC available.

Dns Zephyr
NVD GitHub
CVSS 3.1
9.4
EPSS
0.1%
CVE-2026-20435 MEDIUM This Month

Device unique identifiers in the preloader of Openwrt, Android, Yocto, RDK-B, and Zephyr can be read by attackers with physical access due to a logic error, leading to local information disclosure without requiring additional privileges or user interaction. This vulnerability affects multiple embedded and IoT platforms where the preloader executes before operating system initialization. No patch is currently available for this issue.

Information Disclosure Openwrt Android Yocto Rdk B +2
NVD
CVSS 3.1
4.6
EPSS
0.0%
CVE-2025-20747 MEDIUM This Month

In gnss service, there is a possible out of bounds write due to an incorrect bounds check. Rated medium severity (CVSS 6.7), this vulnerability is low attack complexity. No vendor patch available.

Stack Overflow Buffer Overflow Privilege Escalation Yocto Rdk B +4
NVD
CVSS 3.1
6.7
EPSS
0.0%
CVE-2025-20746 MEDIUM This Month

In gnss service, there is a possible out of bounds write due to an incorrect bounds check. Rated medium severity (CVSS 6.7), this vulnerability is low attack complexity. No vendor patch available.

Stack Overflow Buffer Overflow Privilege Escalation Yocto Rdk B +4
NVD
CVSS 3.1
6.7
EPSS
0.0%
CVE-2025-7403 HIGH PATCH This Month

Unsafe handling in bt_conn_tx_processor causes a use-after-free, resulting in a write-before-zero. Rated high severity (CVSS 7.6), this vulnerability is no authentication required, low attack complexity.

Buffer Overflow Zephyr
NVD GitHub
CVSS 3.1
7.6
EPSS
0.0%
CVE-2025-10458 HIGH This Month

Parameters are not validated or sanitized, and are later used in various internal operations. Rated high severity (CVSS 7.6), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Zephyr
NVD GitHub
CVSS 3.1
7.6
EPSS
0.0%
CVE-2025-10457 MEDIUM POC Monitor

The function responsible for handling BLE connection responses does not verify whether a response is expected-that is, whether the device has initiated a connection request. Rated medium severity (CVSS 4.3), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Information Disclosure Zephyr
NVD GitHub
CVSS 3.1
4.3
EPSS
0.0%
CVE-2025-10456 HIGH PATCH This Month

A vulnerability was identified in the handling of Bluetooth Low Energy (BLE) fixed channels (such as SMP or ATT). Rated high severity (CVSS 7.1), this vulnerability is no authentication required, low attack complexity. This Integer Overflow vulnerability could allow attackers to cause unexpected behavior through arithmetic overflow.

Buffer Overflow Integer Overflow Zephyr
NVD GitHub
CVSS 3.1
7.1
EPSS
0.0%
CVE-2025-20696 MEDIUM This Month

In DA, there is a possible out of bounds write due to a missing bounds check. Rated medium severity (CVSS 6.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

Memory Corruption Buffer Overflow Privilege Escalation Yocto Rdk B +4
NVD
CVSS 3.1
6.8
EPSS
0.0%
CVE-2025-2962 HIGH POC This Week

CVE-2025-2962 is a denial-of-service vulnerability in a DNS implementation that triggers an infinite loop condition, allowing unauthenticated remote attackers to crash DNS services with high availability impact. The vulnerability affects DNS resolver implementations and has a CVSS score of 7.5 (High) with a network-based attack vector requiring no privileges or user interaction. While the CVE ID and basic metadata are provided, specific product names, versions, KEV status, EPSS scores, and public proof-of-concept availability cannot be confirmed from the limited data supplied.

Denial Of Service Dns Zephyr
NVD GitHub
CVSS 3.1
7.5
EPSS
0.0%
CVE-2025-1675 HIGH PATCH This Week

The function dns_copy_qname in dns_pack.c performs performs a memcpy operation with an untrusted field and does not check if the source buffer is large enough to contain the copied data. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Out-of-bounds Read vulnerability could allow attackers to read data from memory outside the intended buffer boundaries.

Information Disclosure Buffer Overflow Zephyr
NVD GitHub
CVSS 3.1
8.2
EPSS
0.3%
CVE-2025-1674 HIGH This Week

A lack of input validation allows for out of bounds reads caused by malicious or malformed packets. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Buffer Overflow Zephyr
NVD GitHub
CVSS 3.1
8.2
EPSS
0.2%
CVE-2025-1673 HIGH This Week

A malicious or malformed DNS packet without a payload can cause an out-of-bounds read, resulting in a crash (denial of service) or an incorrect computation. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Buffer Overflow Denial Of Service Zephyr
NVD GitHub
CVSS 3.1
8.2
EPSS
0.3%
CVE-2024-10395 HIGH PATCH This Month

No proper validation of the length of user input in http_server_get_content_type_from_extension. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

Information Disclosure Zephyr
NVD GitHub
CVSS 3.1
8.6
EPSS
0.3%
CVE-2026-1678
EPSS 0% CVSS 9.4
CRITICAL POC Act Now

Buffer overflow in Zephyr RTOS dns_unpack_name() function causing OOB writes. PoC available.

Dns Zephyr
NVD GitHub
CVE-2026-20435
EPSS 0% CVSS 4.6
MEDIUM This Month

Device unique identifiers in the preloader of Openwrt, Android, Yocto, RDK-B, and Zephyr can be read by attackers with physical access due to a logic error, leading to local information disclosure without requiring additional privileges or user interaction. This vulnerability affects multiple embedded and IoT platforms where the preloader executes before operating system initialization. No patch is currently available for this issue.

Information Disclosure Openwrt Android +4
NVD
CVE-2025-20747
EPSS 0% CVSS 6.7
MEDIUM This Month

In gnss service, there is a possible out of bounds write due to an incorrect bounds check. Rated medium severity (CVSS 6.7), this vulnerability is low attack complexity. No vendor patch available.

Stack Overflow Buffer Overflow Privilege Escalation +6
NVD
CVE-2025-20746
EPSS 0% CVSS 6.7
MEDIUM This Month

In gnss service, there is a possible out of bounds write due to an incorrect bounds check. Rated medium severity (CVSS 6.7), this vulnerability is low attack complexity. No vendor patch available.

Stack Overflow Buffer Overflow Privilege Escalation +6
NVD
CVE-2025-7403
EPSS 0% CVSS 7.6
HIGH PATCH This Month

Unsafe handling in bt_conn_tx_processor causes a use-after-free, resulting in a write-before-zero. Rated high severity (CVSS 7.6), this vulnerability is no authentication required, low attack complexity.

Buffer Overflow Zephyr
NVD GitHub
CVE-2025-10458
EPSS 0% CVSS 7.6
HIGH This Month

Parameters are not validated or sanitized, and are later used in various internal operations. Rated high severity (CVSS 7.6), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Zephyr
NVD GitHub
CVE-2025-10457
EPSS 0% CVSS 4.3
MEDIUM POC Monitor

The function responsible for handling BLE connection responses does not verify whether a response is expected-that is, whether the device has initiated a connection request. Rated medium severity (CVSS 4.3), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Information Disclosure Zephyr
NVD GitHub
CVE-2025-10456
EPSS 0% CVSS 7.1
HIGH PATCH This Month

A vulnerability was identified in the handling of Bluetooth Low Energy (BLE) fixed channels (such as SMP or ATT). Rated high severity (CVSS 7.1), this vulnerability is no authentication required, low attack complexity. This Integer Overflow vulnerability could allow attackers to cause unexpected behavior through arithmetic overflow.

Buffer Overflow Integer Overflow Zephyr
NVD GitHub
CVE-2025-20696
EPSS 0% CVSS 6.8
MEDIUM This Month

In DA, there is a possible out of bounds write due to a missing bounds check. Rated medium severity (CVSS 6.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

Memory Corruption Buffer Overflow Privilege Escalation +6
NVD
CVE-2025-2962
EPSS 0% CVSS 7.5
HIGH POC This Week

CVE-2025-2962 is a denial-of-service vulnerability in a DNS implementation that triggers an infinite loop condition, allowing unauthenticated remote attackers to crash DNS services with high availability impact. The vulnerability affects DNS resolver implementations and has a CVSS score of 7.5 (High) with a network-based attack vector requiring no privileges or user interaction. While the CVE ID and basic metadata are provided, specific product names, versions, KEV status, EPSS scores, and public proof-of-concept availability cannot be confirmed from the limited data supplied.

Denial Of Service Dns Zephyr
NVD GitHub
CVE-2025-1675
EPSS 0% CVSS 8.2
HIGH PATCH This Week

The function dns_copy_qname in dns_pack.c performs performs a memcpy operation with an untrusted field and does not check if the source buffer is large enough to contain the copied data. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Out-of-bounds Read vulnerability could allow attackers to read data from memory outside the intended buffer boundaries.

Information Disclosure Buffer Overflow Zephyr
NVD GitHub
CVE-2025-1674
EPSS 0% CVSS 8.2
HIGH This Week

A lack of input validation allows for out of bounds reads caused by malicious or malformed packets. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Buffer Overflow Zephyr
NVD GitHub
CVE-2025-1673
EPSS 0% CVSS 8.2
HIGH This Week

A malicious or malformed DNS packet without a payload can cause an out-of-bounds read, resulting in a crash (denial of service) or an incorrect computation. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information Disclosure Buffer Overflow Denial Of Service +1
NVD GitHub
CVE-2024-10395
EPSS 0% CVSS 8.6
HIGH PATCH This Month

No proper validation of the length of user input in http_server_get_content_type_from_extension. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

Information Disclosure Zephyr
NVD GitHub

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