Cloud Vulnerability DB
A community-led vulnerabilities database
Vulnerability DatabaseCVE-2025-39704
CVE-2025-39704:
Linux Debian vulnerability analysis and mitigation
Overview
A stack protector issue was discovered in the Linux kernel's KVM implementation for LoongArch architecture, specifically in the sendipidata() function. The vulnerability was disclosed on September 5, 2025, and affects the buffer handling in the kvmiobus_read() function (NVD).
Technical details
The vulnerability occurs when kvmiobusread() is called in the sendipidata() function, where the buffer size of parameter *val should be at least 8 bytes. The issue arises because emulation functions like loongarchipireadl() and kvmeiointcread() write the buffer *val with 8 bytes signed extension regardless of the parameter length, leading to a buffer overflow when CONFIGSTACKPROTECTOR is enabled (NVD).
Impact
When exploited, this vulnerability results in a kernel panic with stack corruption, as evidenced by the error message: "stack-protector: Kernel stack is corrupted in: sendipidata+0x194/0x1a0 [kvm]" (NVD).
Mitigation and workarounds
The issue has been resolved in the Linux kernel through patches that address the buffer size handling in the sendipidata() function (Kernel.org).
Additional resources
Source: This report was generated using AI
Related Linux Debian vulnerabilities:
Free Vulnerability Assessment
Benchmark your Cloud Security Posture
Evaluate your cloud security practices across 9 security domains to benchmark your risk level and identify gaps in your defenses.
Additional Wiz resources
Get a personalized demo
Ready to see Wiz in action?
"Best User Experience I have ever seen, provides full visibility to cloud workloads."
David EstlickCISO
"Wiz provides a single pane of glass to see what is going on in our cloud environments."
Adam FletcherChief Security Officer
"We know that if Wiz identifies something as critical, it actually is."
Greg PoniatowskiHead of Threat and Vulnerability Management