CVE-2025-22073
📋 TL;DR
This CVE describes a memory leak vulnerability in the Linux kernel's SPUFS (Synergistic Processing Unit File System) when file creation fails. The leak occurs when a negative dentry isn't properly cleaned up during error handling. This affects Linux systems using SPUFS, typically those with Cell Broadband Engine processors.
💻 Affected Systems
- Linux kernel
📦 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 →⚠️ Risk & Real-World Impact
Worst Case
Sustained exploitation could lead to kernel memory exhaustion, causing system instability, denial of service, or potential kernel crashes.
Likely Case
Local attackers could trigger repeated failures to gradually consume kernel memory, leading to performance degradation or system instability over time.
If Mitigated
With proper access controls, impact is limited to denial of service from memory exhaustion rather than privilege escalation.
🎯 Exploit Status
Requires local access and ability to trigger SPUFS operations. Memory leak vulnerabilities are typically harder to weaponize for privilege escalation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Multiple stable kernel versions with commits: 0bd56e4e72c3, 132925bd6772, 35f789ccebd6, 53b189651c33, 90d1b276d1b1
Vendor Advisory: https://git.kernel.org/stable/c/0bd56e4e72c354b65c0a7e5ac1c09eca81949d5b
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version. 2. Check if SPUFS is enabled in your kernel configuration. 3. Reboot system after kernel update.
🔧 Temporary Workarounds
Disable SPUFS module
linuxRemove or blacklist SPUFS module if not needed
echo 'blacklist spufs' >> /etc/modprobe.d/blacklist.conf
rmmod spufs
🧯 If You Can't Patch
- Restrict user access to SPUFS operations and monitor for abnormal memory usage
- Implement kernel memory usage monitoring and alerting for unusual patterns
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if SPUFS is loaded: 'lsmod | grep spufs' and 'uname -r'Check Version:
uname -rVerify Fix Applied:
Verify kernel version includes the fix commits and SPUFS module loads without errors📡 Detection & Monitoring
Log Indicators:
- Kernel oops messages
- Memory allocation failures in kernel logs
- SPUFS-related error messages
Network Indicators:
- None - local vulnerability only
SIEM Query:
Search for kernel panic messages or memory allocation failures in system logs🔗 References
- https://git.kernel.org/stable/c/0bd56e4e72c354b65c0a7e5ac1c09eca81949d5b
- https://git.kernel.org/stable/c/132925bd6772d7614340fb755ac5415462ac8edd
- https://git.kernel.org/stable/c/35f789ccebd69f6f9a1e0a9b85435003b2450065
- https://git.kernel.org/stable/c/53b189651c33b5f1fb3b755e6a37a8206978514e
- https://git.kernel.org/stable/c/90d1b276d1b1379d20ad27d1f6349ba9f44a2e00
- https://git.kernel.org/stable/c/96de7fbdc2dcadeebc17c3cb89e7cdab487bfce0
- https://git.kernel.org/stable/c/b1eef06d10c1a9848e3a762919bbbe315a0a7cb4
- https://git.kernel.org/stable/c/d1ca8698ca1332625d83ea0d753747be66f9906d
- https://git.kernel.org/stable/c/d791985ceeb081155b4e96d314ca54c7605dcbe0
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
