CVE-2025-21663
10.0 · CRITICALOverview
CVE-2025-21663 is a critical-severity vulnerability affecting linux linux_kernel. It was published on January 21, 2025 and has a CVSS 3.1 base score of 10.0 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
In the Linux kernel, the following vulnerability has been resolved:
net: stmmac: dwmac-tegra: Read iommu stream id from device tree
Nvidia's Tegra MGBE controllers require the IOMMU "Stream ID" (SID) to be
written to the MGBE_WRAP_AXI_ASID0_CTRL register.
The current driver is hard coded to use MGBE0's SID for all controllers.
This causes softirq time outs and kernel panics when using controllers
other than MGBE0.
Example dmesg errors when an ethernet cable is connected to MGBE1:
[ 116.133290] tegra-mgbe 6910000.ethernet eth1: Link is Up - 1Gbps/Full - flow control rx/tx
[ 121.851283] tegra-mgbe 6910000.ethernet eth1: NETDEV WATCHDOG: CPU: 5: transmit queue 0 timed out 5690 ms
[ 121.851782] tegra-mgbe 6910000.ethernet eth1: Reset adapter.
[ 121.892464] tegra-mgbe 6910000.ethernet eth1: Register MEM_TYPE_PAGE_POOL RxQ-0
[ 121.905920] tegra-mgbe 6910000.ethernet eth1: PHY [stmmac-1:00] driver [Aquantia AQR113] (irq=171)
[ 121.907356] tegra-mgbe 6910000.ethernet eth1: Enabling
Remediation
Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| linux | linux_kernel | >= 6.2, < 6.6.72 | Affected |
Frequently Asked Questions
What is CVE-2025-21663?
CVE-2025-21663 is a critical-severity vulnerability affecting linux linux_kernel. It was published on January 21, 2025 and has a CVSS 3.1 base score of 10.0 (CRITICAL).
How severe is CVE-2025-21663?
This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-21663?
Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-21663?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-21663 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
Related CRITICAL CVEs from 2025
View all →Huang Yaoshi Pharmaceutical Management Software through 16.0 allows arbitrary file upload via a .asp
Unrestricted Upload of File with Dangerous Type vulnerability in themeglow JobBoard Job listing job-
An issue was discovered in Aviatrix Controller before 7.1.4191 and 7.2.x before 7.2.4996. Due to the
Unrestricted Upload of File with Dangerous Type vulnerability in jumpdemand 4ECPS Web Forms 4ecps-we
An os command injection vulnerability exists in the touchlist_sync.cgi touchlistsync() functionality
A stack-based buffer overflow vulnerability exists in the touchlist_sync.cgi touchlistsync() functio
A buffer overflow vulnerability exists in the login.cgi Goto_chidx() functionality of Wavlink AC3000
A firmware update vulnerability exists in the login.cgi functionality of Wavlink AC3000 M33A8.V5030.
A static login vulnerability exists in the wctrls functionality of Wavlink AC3000 M33A8.V5030.210505
Multiple OS command injection vulnerabilities exist in the login.cgi set_sys_init() functionality of
Multiple OS command injection vulnerabilities exist in the login.cgi set_sys_init() functionality of
Multiple OS command injection vulnerabilities exist in the login.cgi set_sys_init() functionality of