CVE-2025-22046 uprobes/x86: Harden uretprobe syscall trampoline check
Attackers could bypass uretprobe syscall checks by targeting low memory addresses, potentially circumventing security controls in the Linux kernel.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-22046?
CVE-2025-22046 is a medium-severity vulnerability in Linux kernel, published on 16 Apr 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
uprobes/x86: Harden uretprobe syscall trampoline check
Jann reported a possible issue when trampoline_check_ip returns address near the bottom of the address space that is allowed to call into the syscall if uretprobes are not set up:
https://lore.kernel.org/bpf/202502081235.5A6F352985@keescook/T/#m9d416df341b8fbc11737dacbcd29f0054413cbbf
Though the mmap minimum address restrictions will typically prevent creating mappings there, let's make sure uretprobe syscall checks for that.
Which versions are affected by CVE-2025-22046?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-22046?
Apply the vendor's patch.
Is CVE-2025-22046 being exploited?
There is no known exploitation of CVE-2025-22046 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-22046, DEBIAN-CVE-2025-22046, GHSA-wqf7-x4xg-j697, UBUNTU-CVE-2025-22046.