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.
Does this matter?
Lower severity and a low EPSS score (0.18%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.18% probability · 8th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel · debian/debian linux
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/183bdb89af1b5193b1d1d9316986053b15ca6fa4Patch
- https://git.kernel.org/stable/c/8e8bf7bc6aa6f583336c2fda280b6cea0aed5612Patch
- https://git.kernel.org/stable/c/a0a8009083e569b5526c64f7d3f2a62baca95164Patch
- https://git.kernel.org/stable/c/ba677dbe77af5ffe6204e0f3f547f3ba059c6302Patch
- https://git.kernel.org/stable/c/c0aec35f861fa746ca45aa816161c74352e6ada8Patch
- https://git.kernel.org/stable/c/d5074256b642cdeb46a70ce2f15193e766edca68Patch
- https://git.kernel.org/stable/c/d7ef1afd5b3f43f4924326164cee5397b66abd9cPatch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.