CVE-2026-43230Network attack vector

Persistent connection failure via uncleared reconnect flag

Published May 6, 2026 · Updated May 6, 2026

Logic error in the Linux Kernel RDS subsystem allows remote attackers to permanently prevent an affected connection from reconnecting. In rds_conn_shutdown(), cancel_delayed_work_sync() can stop the worker before it clears RDS_RECONNECT_PENDING, leaving the flag set indefinitely. The RDS subsystem must be in use and the reconnect worker must be canceled before it runs; the affected connection then cannot reconnect.

CVSS severity7.5
High
EPSS probability0.52%
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

Logic error in the Linux Kernel RDS subsystem allows remote attackers to permanently prevent an affected connection from reconnecting. In rds_conn_shutdown(), cancel_delayed_work_sync() can stop the worker before it clears RDS_RECONNECT_PENDING, leaving the flag set indefinitely. The RDS subsystem must be in use and the reconnect worker must be canceled before it runs; the affected connection then cannot reconnect.

The record

CVE
CVE-2026-43230
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <14eae5564053ac3973b9369dc674638f22f4765e
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <391200c274e90c34071b909ba12e3390b81b767f
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3cf001aff71b1db1b4732a5381b012a114720664
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <597c46a42930c963f448720aaf5001dd4ed98af4
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <60b347333ec259ac7352f62cbbc365b04c065ff8
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b89fc7c2523b2b0750d91840f4e52521270d70ed
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ba2e3472022f44baddf000621fed150d7a599ea3
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bcf034fa5f66b6a3e787f765a917934a2045cf7a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <14eae5564053ac3973b9369dc674638f22f4765e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <391200c274e90c34071b909ba12e3390b81b767f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3cf001aff71b1db1b4732a5381b012a114720664; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <597c46a42930c963f448720aaf5001dd4ed98af4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <60b347333ec259ac7352f62cbbc365b04c065ff8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b89fc7c2523b2b0750d91840f4e52521270d70ed; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ba2e3472022f44baddf000621fed150d7a599ea3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bcf034fa5f66b6a3e787f765a917934a2045cf7a

Published CVSS scores

7.5kernel.orgCVSS:3.1/AV:N/AC:L/PR:N/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 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

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