CVE-2026-97413Network attack vectorHinoki check available

Out-of-bounds access via RDMA length underflow

Published Sep 24, 2026 · Updated Sep 24, 2026

Integer underflow in the Linux kernel RTRS server allows remote attackers to trigger out-of-bounds memory access with a crafted RDMA request. process_read and process_write subtract peer-controlled usr_len from off without first ensuring that usr_len is no greater, so data_len wraps to a huge size_t. Reachability requires an RDMA peer connected to an RTRS/RNBD server; the wrapped length reaches rdma_ev and can access memory beyond the request chunk.

CVSS severityUnavailable
Unscored
EPSS probability0.50%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Integer underflow in the Linux kernel RTRS server allows remote attackers to trigger out-of-bounds memory access with a crafted RDMA request. process_read and process_write subtract peer-controlled usr_len from off without first ensuring that usr_len is no greater, so data_len wraps to a huge size_t. Reachability requires an RDMA peer connected to an RTRS/RNBD server; the wrapped length reaches rdma_ev and can access memory beyond the request chunk.

The record

CVE
CVE-2026-97413
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1210
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 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=0 <6.12.111
  2. Affected versionversion=0 <6.18.53
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <24ad03bfeda05fca04c56677e57fd3d6bc3e9978
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c76e9123ab91a903396d26e6ab1b5caae5c6b149

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=0 <6.12.111; version=0 <6.18.53; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <24ad03bfeda05fca04c56677e57fd3d6bc3e9978; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c76e9123ab91a903396d26e6ab1b5caae5c6b149

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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