Bug 2383482 (CVE-2025-38466) - CVE-2025-38466 kernel: perf: Revert to requiring CAP_SYS_ADMIN for uprobes
Summary: CVE-2025-38466 kernel: perf: Revert to requiring CAP_SYS_ADMIN for uprobes
Keywords:
Status: NEW
Alias: CVE-2025-38466
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-07-25 16:01 UTC by OSIDB Bzimport
Modified: 2025-07-27 17:41 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2025-07-25 16:01:40 UTC
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.


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