CVE-2024-36476Network attack vector

Remote kernel crash via scoped scatter-gather list

Published Jan 15, 2025 · Updated Aug 5, 2026

NULL pointer dereference in Linux kernel RDMA/RTRS code allows remote attackers to crash affected kernels through crafted RDMA messages. In send_io_resp_imm(), an ib_sge list declared only inside the always_invalidate block is later needed to build the RDMA response work request. The RTRS server is reachable without authentication over routable RDMA transports, and always_invalidate defaults to enabled.

CVSS severity9.8
Critical
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux kernel RDMA/RTRS code allows remote attackers to crash affected kernels through crafted RDMA messages. In send_io_resp_imm(), an ib_sge list declared only inside the always_invalidate block is later needed to build the RDMA response work request. The RTRS server is reachable without authentication over routable RDMA transports, and always_invalidate defaults to enabled.

The record

CVE
CVE-2024-36476
Published
Jan 15, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=5.8
  2. Affected versionversion=9cb837480424e78ed585376f944088246685aec3 <143378075904e78b3b2a810099bcc3b3d82d762f
  3. Affected versionversion=9cb837480424e78ed585376f944088246685aec3 <32e1e748a85bd52b20b3857d80fd166d22fa455a
  4. Affected versionversion=9cb837480424e78ed585376f944088246685aec3 <6ffb5c1885195ae5211a12b4acd2d51843ca41b0
  5. Affected versionversion=9cb837480424e78ed585376f944088246685aec3 <7eaa71f56a6f7ab87957213472dc6d4055862722
  6. Affected versionversion=9cb837480424e78ed585376f944088246685aec3 <b238f61cc394d5fef27b26d7d9aa383ebfddabb0
  7. Affected versionversion=9cb837480424e78ed585376f944088246685aec3 <fb514b31395946022f13a08e06a435f53cf9e8b3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.8; version=9cb837480424e78ed585376f944088246685aec3 <143378075904e78b3b2a810099bcc3b3d82d762f; version=9cb837480424e78ed585376f944088246685aec3 <32e1e748a85bd52b20b3857d80fd166d22fa455a; version=9cb837480424e78ed585376f944088246685aec3 <6ffb5c1885195ae5211a12b4acd2d51843ca41b0; version=9cb837480424e78ed585376f944088246685aec3 <7eaa71f56a6f7ab87957213472dc6d4055862722; version=9cb837480424e78ed585376f944088246685aec3 <b238f61cc394d5fef27b26d7d9aa383ebfddabb0; version=9cb837480424e78ed585376f944088246685aec3 <fb514b31395946022f13a08e06a435f53cf9e8b3

Published CVSS scores

9.8Linux kernel CVE teamCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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