CVE-2026-23063
📋 TL;DR
This Linux kernel vulnerability in the uacce subsystem allows race conditions during queue release operations, potentially leading to use-after-free conditions or NULL pointer dereferences. It affects systems using hardware accelerators via the uacce framework, particularly in virtualization environments where concurrent operations can trigger the issue.
💻 Affected Systems
- Linux kernel with uacce subsystem
📦 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 →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 or system crash leading to denial of service, potentially allowing privilege escalation if combined with other vulnerabilities.
Likely Case
System instability or crash when using hardware accelerators during power management operations in virtualized environments.
If Mitigated
No impact if uacce subsystem is not used or if proper state management prevents concurrent operations.
🎯 Exploit Status
Requires local access and specific timing conditions during power management operations with active hardware accelerators.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patches available in stable kernel trees (commits: 26c08dabe5475d99a13f353d8dd70e518de45663, 43f233eb6e7b9d88536881a9bc43726d0e34800d, 47634d70073890c9c37e39ab4ff93d4b585b028a, 92e4f11e29b98ef424ff72d6371acac03e5d973c)
Vendor Advisory: https://git.kernel.org/stable/c/26c08dabe5475d99a13f353d8dd70e518de45663
Restart Required: Yes
Instructions:
1. Update to a patched kernel version from your distribution's repositories. 2. Reboot the system to load the new kernel. 3. Verify the fix by checking kernel version.
🔧 Temporary Workarounds
Disable uacce subsystem
linuxPrevent use of the vulnerable subsystem by disabling it at kernel level
Add 'uacce.disable=1' to kernel boot parameters
Avoid concurrent operations
linuxEnsure hardware accelerators are not active during power management operations
🧯 If You Can't Patch
- Disable hardware accelerator usage in virtualized environments
- Implement strict access controls to prevent unauthorized local access to affected systems
🔍 How to Verify
Check if Vulnerable:
Check if uacce subsystem is enabled and if kernel version contains the vulnerable code. Use: 'lsmod | grep uacce' and 'uname -r'Check Version:
uname -rVerify Fix Applied:
Verify kernel version is updated to include the patch commits. Check kernel changelog or verify with distribution-specific update verification tools.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- NULL pointer dereference errors in kernel logs
- Hardware accelerator failure messages
Network Indicators:
- None - local vulnerability only
SIEM Query:
Search for kernel panic events or hardware accelerator errors in system logs🔗 References
- https://git.kernel.org/stable/c/26c08dabe5475d99a13f353d8dd70e518de45663
- https://git.kernel.org/stable/c/336fb41a186e7c0415ae94fec9e23d1f04b87483
- https://git.kernel.org/stable/c/43f233eb6e7b9d88536881a9bc43726d0e34800d
- https://git.kernel.org/stable/c/47634d70073890c9c37e39ab4ff93d4b585b028a
- https://git.kernel.org/stable/c/8b57bf1d3b1db692f34bce694a03e41be79f6016
- https://git.kernel.org/stable/c/92e4f11e29b98ef424ff72d6371acac03e5d973c
- https://git.kernel.org/stable/c/b457abeb5d962db88aaf60e249402fd3073dbfab
