Description
In the Linux kernel, the following vulnerability has been resolved:

RDMA/rtrs: guard against null kobj name

In the client, if `init_path()` errors, the callee tries to clean up
with `rtrs_clt_close_conns()`. However, this can lead to calling the
event tracing code with `clt_path->kobj->name` being `NULL` and thus
causing a null pointer dereference when trying to copy from it.

This just adds a guard to check that the name is not `NULL` before
copying from it. The server appears to have a similar pattern.
Published: 2026-10-06
Score: 5.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service (kernel crash)
Action: Patch
AI Analysis

Impact

An attacker can exploit a null pointer dereference in the Linux RDMA/rtrs event tracing code. When a client’s initialization fails, the cleanup routine accesses clt_path->kobj->name without checking for NULL, causing a crash when the name pointer is NULL. This results in a kernel panic, disrupting availability without impacting confidentiality or integrity directly.

Affected Systems

The flaw exists in the RDMA/rtrs component of the Linux kernel. All systems running a kernel version that contains the unpatched RDMA/rtrs code are vulnerable, regardless of distribution. No specific version list is supplied, so any installation with the legacy code path is at risk.

Risk and Exploitability

The EPSS score is reported as < 1% and the issue does not appear in CISA’s KEV catalog, indicating low public exploitation activity. Based on the description, it is inferred that the attack requires local privilege or code execution to reach the faulty client path, focusing on system stability through a local denial of service. The CVSS score of 5.5 indicates moderate severity, emphasizing the impact of a kernel crash.

Generated by OpenCVE AI on October 7, 2026 at 14:02 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the kernel patch that introduces a NULL guard in the RDMA/rtrs event‑tracing cleanup routine, as referenced in the provided commit links.
  • Upgrade the kernel to a version that already includes the fix, ensuring the RDMA/rtrs code has been updated.
  • If RDMA/rtrs is not required, disable the RDMA subsystem or the event‑tracing component to eliminate the vulnerability window.
  • Monitor system logs for kernel panics or stack traces that indicate a null‑pointer dereference in the RDMA/rtrs path.

Generated by OpenCVE AI on October 7, 2026 at 14:02 UTC.

Tracking

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Advisories

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History

Wed, 07 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Wed, 07 Oct 2026 04:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-476

Tue, 06 Oct 2026 18:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-476

Tue, 06 Oct 2026 14:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-476

Tue, 06 Oct 2026 09:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: RDMA/rtrs: guard against null kobj name In the client, if `init_path()` errors, the callee tries to clean up with `rtrs_clt_close_conns()`. However, this can lead to calling the event tracing code with `clt_path->kobj->name` being `NULL` and thus causing a null pointer dereference when trying to copy from it. This just adds a guard to check that the name is not `NULL` before copying from it. The server appears to have a similar pattern.
Title RDMA/rtrs: guard against null kobj name
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-10-19T09:18:05.923Z

Reserved: 2026-09-25T10:25:14.344Z

Link: CVE-2026-98355

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-06T09:18:29.040

Modified: 2026-10-19T10:18:38.210

Link: CVE-2026-98355

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-06T00:00:00Z

Links: CVE-2026-98355 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-07T14:15:15Z

Weaknesses