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CVE-2025-38466 Not scored

perf: Revert to requiring CAP_SYS_ADMIN for uprobes

In the Linux kernel, the following vulnerability has been resolved: perf: Revert to requiring CAP_SYS_ADMIN for uprobes Jann reports that uprobes can be used destructively when used in the middle of an instruction. The kernel only verifies there is a valid instruction at the requested offset, but due to variable instruction length cannot determine if this is an instruction as seen by the intended execution stream. Additionally, Mark Rutland notes that on architectures that mix data in the text segment (like arm64), a similar things can be done if the data word is 'mistaken' for an instruction. As such, require CAP_SYS_ADMIN for uprobes.

Exploit probability 0.2%
Published July 25, 2025
Required by Not available
Last source change July 15, 2026

02 / AFFECTED SOFTWARE

Affected packages

Linux Kernel
Unknown Unknown

03 / CONNECTIONS

Connected vulnerabilities

related OPENSUSE-SU-2025:20081-1
related SUSE-SU-2025:03600-1
related SUSE-SU-2025:03601-1
related SUSE-SU-2025:03602-1
related SUSE-SU-2025:03633-1
related SUSE-SU-2025:03634-1
related SUSE-SU-2025:20851-1
related SUSE-SU-2025:20861-1
related SUSE-SU-2025:20870-1
related SUSE-SU-2025:20898-1
related SUSE-SU-2025:21074-1
related SUSE-SU-2025:21139-1
related SUSE-SU-2025:21179-1
related SUSE-SU-2025:3725-1
related SUSE-SU-2025:3751-1

04 / EVIDENCE

Source records

Open Source Vulnerabilities CVE-2025-38466

In the Linux kernel, the following vulnerability has been resolved: perf: Revert to requiring CAP_SYS_ADMIN for uprobes Jann reports that uprobes can be used destructively when used in the middle of an instruction. The kernel only verifies there is a valid instruction at the requested offset, but due to variable instruction length cannot determine if this is an instruction as seen by the intended execution stream. Additionally, Mark Rutland notes that on architectures that mix data in the text segment (like arm64), a similar things can be done if the data word is 'mistaken' for an instruction. As such, require CAP_SYS_ADMIN for uprobes.

View original source

05 / REFERENCES

Further evidence