CVE-2026-45849

Local service interruption via missing injection lock

Published May 27, 2026 · Updated May 27, 2026

Improper locking in the Linux Kernel Ocelot driver allows local users to interrupt service through the register-injection path. The ocelot_port_xmit_inj() path calls ocelot_can_inject() and ocelot_port_inject_frame() without holding the required injection-group lock. Exploitation requires local low-privileged access and use of Ocelot register injection; published sources do not identify the exact failure mode, and FDMA is unaffected.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the Linux Kernel Ocelot driver allows local users to interrupt service through the register-injection path. The ocelot_port_xmit_inj() path calls ocelot_can_inject() and ocelot_port_inject_frame() without holding the required injection-group lock. Exploitation requires local low-privileged access and use of Ocelot register injection; published sources do not identify the exact failure mode, and FDMA is unaffected.

The record

CVE
CVE-2026-45849
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-667, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=609cd73bf38bbd48f1e695e01802114b01aa8811
  2. Affected versionversion=6.10.7 <6.11
  3. Affected versionversion=6.11
  4. Affected versionversion=6.1.107 <6.1.165
  5. Affected versionversion=6.6.48 <6.6.128
  6. Affected versionversion=960ec92774e152b677ccd0006abcab7b9dd814c2 <0b217a40156f497e09dd20d3f7baec40c785f386
  7. Affected versionversion=c5e12ac3beb0dd3a718296b2d8af5528e9ab728e <026f6513c5880c2c89e38ad66bbec2868f978605
  8. Affected versionversion=c5e12ac3beb0dd3a718296b2d8af5528e9ab728e <51c32ae7fae14552d79f7139614b77c1bbd57a48
  9. Affected versionversion=c5e12ac3beb0dd3a718296b2d8af5528e9ab728e <63da961381e0d979459dede713001f8452364477
  10. Affected versionversion=c5e12ac3beb0dd3a718296b2d8af5528e9ab728e <7ac58d8832802ec89baa7539e13e6d58a88cce04
  11. Affected versionversion=e83b49ecb569c9c5fa7cc30e55cf2c15f71f9f39 <cc1b179f778f98270bdbbb48d183b4b6427ae198

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=609cd73bf38bbd48f1e695e01802114b01aa8811; version=6.10.7 <6.11; version=6.11; version=6.1.107 <6.1.165; version=6.6.48 <6.6.128; version=960ec92774e152b677ccd0006abcab7b9dd814c2 <0b217a40156f497e09dd20d3f7baec40c785f386; version=c5e12ac3beb0dd3a718296b2d8af5528e9ab728e <026f6513c5880c2c89e38ad66bbec2868f978605; version=c5e12ac3beb0dd3a718296b2d8af5528e9ab728e <51c32ae7fae14552d79f7139614b77c1bbd57a48; version=c5e12ac3beb0dd3a718296b2d8af5528e9ab728e <63da961381e0d979459dede713001f8452364477; version=c5e12ac3beb0dd3a718296b2d8af5528e9ab728e <7ac58d8832802ec89baa7539e13e6d58a88cce04; version=e83b49ecb569c9c5fa7cc30e55cf2c15f71f9f39 <cc1b179f778f98270bdbbb48d183b4b6427ae198

Published CVSS scores

4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS: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.

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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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-667Improper Locking
T1499Endpoint Denial of Service

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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