CVE-2026-74717Network attack vector

Host denial of service via error-pointer dereference

Published Aug 22, 2026 · Updated Aug 25, 2026

Denial of service in the Linux kernel mlx5 driver allows remote attackers to panic affected hosts via crafted network or RDMA traffic. mlx5_fw_tracer_create stores an ERR_PTR after tracer creation fails, while mlx5_fw_tracer_trigger_core_dump_general checks only for NULL and dereferences the encoded error pointer. Reachability requires an affected kernel on a host with an mlx5 physical-function NIC where crafted traffic induces a firmware syndrome and invokes the health-reporter dump path.

CVSS severity7.5
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in the Linux kernel mlx5 driver allows remote attackers to panic affected hosts via crafted network or RDMA traffic. mlx5_fw_tracer_create stores an ERR_PTR after tracer creation fails, while mlx5_fw_tracer_trigger_core_dump_general checks only for NULL and dereferences the encoded error pointer. Reachability requires an affected kernel on a host with an mlx5 physical-function NIC where crafted traffic induces a firmware syndrome and invokes the health-reporter dump path.

The record

CVE
CVE-2026-74717
Published
Aug 22, 2026
Updated
Aug 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 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=5.3
  2. Affected versionversion=fd1483fe1f9fd45fe312adffb0faffa57446690d <04599570c3a18f9ae7aad36825eb46f3dcd2c4e3
  3. Affected versionversion=fd1483fe1f9fd45fe312adffb0faffa57446690d <47fe0d2571e5b446a0f0b0c1d6b99f55e51f5cc0
  4. Affected versionversion=fd1483fe1f9fd45fe312adffb0faffa57446690d <4aafa600d93e9551c1f24e785d57cbd4adf021d5
  5. Affected versionversion=fd1483fe1f9fd45fe312adffb0faffa57446690d <80094352bd40ba54a33731f9c22872493983ed6d
  6. Affected versionversion=fd1483fe1f9fd45fe312adffb0faffa57446690d <9a416f000285a94c1b723877547981dec8132434
  7. Affected versionversion=fd1483fe1f9fd45fe312adffb0faffa57446690d <af39eb111ce6b5eba9c08513b62c4868eb7e7fd5
  8. Affected versionversion=fd1483fe1f9fd45fe312adffb0faffa57446690d <b1d6375b9a63c9dc7e5e780d3ea9b126fe30d6cb
  9. Affected versionversion=fd1483fe1f9fd45fe312adffb0faffa57446690d <ee41ea49c4ab0e4015919f52ad23ec251d3b39d3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.3; version=fd1483fe1f9fd45fe312adffb0faffa57446690d <04599570c3a18f9ae7aad36825eb46f3dcd2c4e3; version=fd1483fe1f9fd45fe312adffb0faffa57446690d <47fe0d2571e5b446a0f0b0c1d6b99f55e51f5cc0; version=fd1483fe1f9fd45fe312adffb0faffa57446690d <4aafa600d93e9551c1f24e785d57cbd4adf021d5; version=fd1483fe1f9fd45fe312adffb0faffa57446690d <80094352bd40ba54a33731f9c22872493983ed6d; version=fd1483fe1f9fd45fe312adffb0faffa57446690d <9a416f000285a94c1b723877547981dec8132434; version=fd1483fe1f9fd45fe312adffb0faffa57446690d <af39eb111ce6b5eba9c08513b62c4868eb7e7fd5; version=fd1483fe1f9fd45fe312adffb0faffa57446690d <b1d6375b9a63c9dc7e5e780d3ea9b126fe30d6cb; version=fd1483fe1f9fd45fe312adffb0faffa57446690d <ee41ea49c4ab0e4015919f52ad23ec251d3b39d3

Published CVSS scores

4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5UbuntuCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5Linux kernel CVE teamCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5Red HatCVSS: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

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

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo