CVE-2025-1673— Out of bounds read when calling crc16_ansi and strlen in dns_validate_msg
Quick assessment
Affected
zephyrproject-rtos Zephyr
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Zephyr是Zephyr开源的一个可扩展的实时操作系统 (RTOS)。 Zephyr 4.0及之前版本存在缓冲区错误漏洞，该漏洞源于恶意或畸形数据包可能导致越界读取，导致崩溃或错误计算。
Possible ATT&CK Techniques 2 AI
T1190 · Exploit Public-Facing Application T1499 · Endpoint Denial of Service
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2025-1673
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Out of bounds read when calling crc16_ansi and strlen in dns_validate_msg
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Zephyr 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zephyr是Zephyr开源的一个可扩展的实时操作系统 (RTOS)。 Zephyr 4.0及之前版本存在缓冲区错误漏洞，该漏洞源于恶意或畸形数据包可能导致越界读取，导致崩溃或错误计算。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| zephyrproject-rtos | Zephyr | * ~ 4.0 | - |
|
II. Public POCs for CVE-2025-1673
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2025-1673
请登录查看更多情报信息。
Vendor Advisories for CVE-2025-1673 (1)
Same Patch Batch · zephyrproject-rtos · 2025-02-25 · 3 CVEs total
| CVE-2025-1675 | 8.2 HIGH | Out of bounds read in dns_copy_qname |
| CVE-2025-1674 | 8.2 HIGH | Out of bounds read when unpacking DNS answers |
IV. Related Vulnerabilities
Same product: Zephyr
-
CVE-2026-18747
Integer underflow of net_buf length in the MCUmgr serial (SM -
CVE-2026-18746
NULL pointer dereference in Zephyr LwM2M client when the CoA -
CVE-2026-18417
Wild pointer dereference in Zephyr BSD sockets when a TCP li -
CVE-2026-18416
Out-of-bounds read in CoAP well-known-core Uri-Query href ma -
CVE-2026-18415
Out-of-bounds write in the IEEE 802.15.4 L2 transmit path fo
Same vendor: zephyrproject-rtos
-
CVE-2026-13351
net: Maliciously fragmented IPv6 packets can prevent receivi -
CVE-2026-5068
bt: l2cap le coc: remote oob write via seg counter stored in -
CVE-2026-5067
Out-of-bounds read/write in HTTP WebSocket upgrade via non-n -
CVE-2026-5066
net: sockets: tls: Potential out-of-bounds write/read in soc -
CVE-2026-5589
Out-of-bounds write caused by an integer underflow in the Bl
Same weakness: CWE-125
-
CVE-2026-18747
Integer underflow of net_buf length in the MCUmgr serial (SM -
CVE-2026-101205
FastStone Image Viewer PCX Decoder out-of-bounds -
CVE-2026-101204
FastStone Image Viewer TGA Image FSViewer.exe out-of-bounds -
CVE-2026-18416
Out-of-bounds read in CoAP well-known-core Uri-Query href ma -
CVE-2026-94285
Out-of-bounds read in libX11's byte-oriented codeset parser
V. Comments for CVE-2025-1673
No comments yet