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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-38067 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: rseq: Fix segfault on registration when rseq_cs is non-zero The rseq_cs field is documented as being set to 0 by user-space prior to registration, however this is not currently enforced by the kernel. This can result in a segfault on return to user-space if the value stored in the rseq_cs field doesn't point to a valid struct rseq_cs. The correct solution to this would be to fail the rseq registration when the rseq_cs field is non-zero. However, some older versions of glibc will reuse the rseq area of previous threads without clearing the rseq_cs field and will also terminate the process if the rseq registration fails in a secondary thread. This wasn't caught in testing because in this case the leftover rseq_cs does point to a valid struct rseq_cs. What we can do is clear the rseq_cs field on registration when it's non-zero which will prevent segfaults on registration and won't break the glibc versions that reuse rseq areas on thread creation.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://cert-portal.siemens.com/productcert/html/ssa-082556.html siemens-SADP
https://git.kernel.org/stable/c/2df285dab00fa03a3ef939b6cb0d0d0aeb0791db kernel.org Patch 
https://git.kernel.org/stable/c/3e4028ef31b69286c9d4878cee0330235f53f218 kernel.org Patch 
https://git.kernel.org/stable/c/48900d839a3454050fd5822e34be8d54c4ec9b86 kernel.org Patch 
https://git.kernel.org/stable/c/b2b05d0dc2f4f0646922068af435aed5763d16ba kernel.org Patch 
https://git.kernel.org/stable/c/eaf112069a904b6207b4106ff083e0208232a2eb kernel.org Patch 
https://git.kernel.org/stable/c/f004f58d18a2d3dc761cf973ad27b4a5997bd876 kernel.org Patch 
https://git.kernel.org/stable/c/fd881d0a085fc54354414aed990ccf05f282ba53 kernel.org Patch 
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html CVE Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html CVE Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  

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Change History

7 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-38067
NVD Published Date:
06/18/2025
NVD Last Modified:
06/17/2026
Source:
kernel.org