CVE-2026-98365Network attack vector

Remote kernel oops via wrapped RDMA range

Published Oct 6, 2026 · Updated Oct 6, 2026

Integer overflow in the Linux kernel's RDMA/rxe memory-range check allows remote attackers to trigger a kernel oops via crafted RDMA reads or writes. The mr_check_range() function adds an attacker-supplied IOVA and length without overflow protection, allowing a wrapped end address to pass validation before rxe_mr_copy_xarray() indexes beyond mr->page_info. Exploitation requires an active Soft RoCE responder with a reachable registered memory region; the documented outcome is a kernel oops, not demonstrated code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.38%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in the Linux kernel's RDMA/rxe memory-range check allows remote attackers to trigger a kernel oops via crafted RDMA reads or writes. The mr_check_range() function adds an attacker-supplied IOVA and length without overflow protection, allowing a wrapped end address to pass validation before rxe_mr_copy_xarray() indexes beyond mr->page_info. Exploitation requires an active Soft RoCE responder with a reachable registered memory region; the documented outcome is a kernel oops, not demonstrated code execution.

The record

CVE
CVE-2026-98365
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.8
  2. Affected versionversion=8700e3e7c4857d28ebaa824509934556da0b3e76 <2f3b705144e3a3c14184fec6e354680081fe91ec
  3. Affected versionversion=8700e3e7c4857d28ebaa824509934556da0b3e76 <3431f525718f6b07da308cda6d44f8cb548bbd37
  4. Affected versionversion=8700e3e7c4857d28ebaa824509934556da0b3e76 <5d9426a74fc8cb8f375fcdc19b465a030f9b8cab
  5. Affected versionversion=8700e3e7c4857d28ebaa824509934556da0b3e76 <b7d2118660545a00b21e83010ded1a231c6fb8c5
  6. Affected versionversion=8700e3e7c4857d28ebaa824509934556da0b3e76 <d10e2a08799e858d3e71ea4169bcd018f216d444

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=8700e3e7c4857d28ebaa824509934556da0b3e76 <2f3b705144e3a3c14184fec6e354680081fe91ec; version=8700e3e7c4857d28ebaa824509934556da0b3e76 <3431f525718f6b07da308cda6d44f8cb548bbd37; version=8700e3e7c4857d28ebaa824509934556da0b3e76 <5d9426a74fc8cb8f375fcdc19b465a030f9b8cab; version=8700e3e7c4857d28ebaa824509934556da0b3e76 <b7d2118660545a00b21e83010ded1a231c6fb8c5; version=8700e3e7c4857d28ebaa824509934556da0b3e76 <d10e2a08799e858d3e71ea4169bcd018f216d444

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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