CVE-2022-29582
📋 TL;DR
CVE-2022-29582 is a use-after-free vulnerability in the Linux kernel's io_uring subsystem caused by a race condition in timeout handling. This allows a local attacker to potentially execute arbitrary code or crash the system, though exploitation is difficult due to the race condition nature. Systems running Linux kernel versions before 5.17.3 are affected.
💻 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 →⚠️ Risk & Real-World Impact
Worst Case
Local privilege escalation to root, arbitrary code execution, or kernel panic leading to denial of service.
Likely Case
Kernel crash or denial of service due to the difficulty of reliably triggering the race condition.
If Mitigated
Minimal impact if proper access controls prevent local user execution or if the race condition cannot be triggered.
🎯 Exploit Status
Exploitation requires winning a race condition, making reliable attacks difficult. No public exploit code has been disclosed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.17.3 and later
Vendor Advisory: https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.3
Restart Required: Yes
Instructions:
1. Update Linux kernel to version 5.17.3 or later. 2. For distributions: Use package manager (apt/yum/dnf) to update kernel package. 3. Reboot system to load new kernel.
🔧 Temporary Workarounds
Disable io_uring module
linuxPrevent loading of the vulnerable io_uring kernel module
echo 'blacklist io_uring' >> /etc/modprobe.d/blacklist-io_uring.conf
update-initramfs -u
reboot
Restrict local user access
allLimit which users can execute programs on the system
🧯 If You Can't Patch
- Implement strict access controls to prevent unauthorized local user execution
- Monitor system logs for kernel panic or crash events related to io_uring
🔍 How to Verify
Check if Vulnerable:
Check kernel version with 'uname -r' and compare to 5.17.3. Versions below 5.17.3 are vulnerable.Check Version:
uname -rVerify Fix Applied:
After patching, verify kernel version is 5.17.3 or higher with 'uname -r'📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- System crash/reboot events
- io_uring related error messages in dmesg
SIEM Query:
source="kernel" AND ("panic" OR "Oops" OR "io_uring")🔗 References
- http://www.openwall.com/lists/oss-security/2022/04/22/4
- http://www.openwall.com/lists/oss-security/2022/08/08/3
- http://www.openwall.com/lists/oss-security/2024/04/24/3
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.3
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e677edbcabee849bfdd43f1602bccbecf736a646
- https://github.com/Ruia-ruia/CVE-2022-29582-Exploit
- https://github.com/torvalds/linux/commit/e677edbcabee849bfdd43f1602bccbecf736a646
- https://ruia-ruia.github.io/2022/08/05/CVE-2022-29582-io-uring/
- https://www.debian.org/security/2022/dsa-5127
- https://www.openwall.com/lists/oss-security/2022/04/22/3
- http://www.openwall.com/lists/oss-security/2022/04/22/4
- http://www.openwall.com/lists/oss-security/2022/08/08/3
- http://www.openwall.com/lists/oss-security/2024/04/24/3
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.3
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e677edbcabee849bfdd43f1602bccbecf736a646
- https://github.com/Ruia-ruia/CVE-2022-29582-Exploit
- https://github.com/torvalds/linux/commit/e677edbcabee849bfdd43f1602bccbecf736a646
- https://ruia-ruia.github.io/2022/08/05/CVE-2022-29582-io-uring/
- https://www.debian.org/security/2022/dsa-5127
- https://www.openwall.com/lists/oss-security/2022/04/22/3
