CVE-2025-39709
📋 TL;DR
A race condition in the Linux kernel's Venus media driver allows a NULL pointer dereference during system boot if an interrupt fires before the interrupt handler is fully initialized. This affects Linux systems using the Venus media driver, potentially causing kernel panics or system crashes during boot on specific hardware like Rb3Gen2.
💻 Affected Systems
- Linux kernel with Venus media driver
📦 What is this software?
Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →⚠️ Risk & Real-World Impact
Worst Case
Kernel panic leading to system crash and denial of service during boot, requiring physical intervention to restart.
Likely Case
System instability or boot failures on affected hardware configurations, particularly during boot sequences.
If Mitigated
No impact if patched or on unaffected hardware configurations.
🎯 Exploit Status
Exploitation requires specific timing during system boot and hardware conditions. More likely to occur as a stability issue than a targeted attack.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions containing commits: 18c2b2bd982b8546312c9a7895515672169f28e0, 3200144a2fa4209dc084a19941b9b203b43580f0, 37cc0ac889b018097c217c5929fd6dc2aed636a1, 639eb587f977c02423f4762467055b23902b4131, 88cf63c2599761c48dec8f618d57dccf8f6f4b53
Vendor Advisory: https://git.kernel.org/stable/c/
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from your distribution vendor. 2. Reboot system to load new kernel. 3. Verify Venus driver loads without errors during boot.
🔧 Temporary Workarounds
Disable Venus media driver
LinuxPrevent loading of vulnerable Venus driver module
echo 'blacklist venus' >> /etc/modprobe.d/blacklist-venus.conf
update-initramfs -u
reboot
🧯 If You Can't Patch
- Avoid using hardware that triggers Venus driver during boot
- Monitor system logs for kernel panic indicators and have recovery procedures ready
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if Venus module is loaded: 'uname -r' and 'lsmod | grep venus'Check Version:
uname -rVerify Fix Applied:
Check kernel version is updated and system boots without Venus-related kernel panics📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages mentioning Venus driver
- NULL pointer dereference errors in dmesg
- System boot failures
Network Indicators:
- None - local vulnerability
SIEM Query:
source="kernel" AND ("venus" OR "NULL pointer dereference")🔗 References
- https://git.kernel.org/stable/c/18c2b2bd982b8546312c9a7895515672169f28e0
- https://git.kernel.org/stable/c/3200144a2fa4209dc084a19941b9b203b43580f0
- https://git.kernel.org/stable/c/37cc0ac889b018097c217c5929fd6dc2aed636a1
- https://git.kernel.org/stable/c/639eb587f977c02423f4762467055b23902b4131
- https://git.kernel.org/stable/c/88cf63c2599761c48dec8f618d57dccf8f6f4b53
- https://git.kernel.org/stable/c/9db6a78bc5e418e0064e2248c8f3b9b9e8418646
- https://git.kernel.org/stable/c/e796028b4835af00d9a38ebbb208ec3a6634702a
- https://git.kernel.org/stable/c/f54be97bc69b1096198b6717c150dec69f2a1b4d
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
