CVE-2024-43887

Kernel crash via TCP-AO static-key teardown race

Published Aug 26, 2024 · Updated May 11, 2026

Race condition in Linux 6.7 through 6.10.4 and 6.11-rc1 through 6.11-rc2 allows local users to crash the kernel through TCP-AO. TCP-AO socket teardown defers disabling tcp_ao_needed while tcp_ao_info expires after an RCU grace period, allowing static_key_fast_inc_not_disabled() to race with jump_label_update(). A low-privileged local user must exercise TCP-AO during the timing window; the invalid jump-label patch triggers a kernel BUG and service interruption.

CVSS severity4.7
Medium
EPSS probability0.19%
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

Race condition in Linux 6.7 through 6.10.4 and 6.11-rc1 through 6.11-rc2 allows local users to crash the kernel through TCP-AO. TCP-AO socket teardown defers disabling tcp_ao_needed while tcp_ao_info expires after an RCU grace period, allowing static_key_fast_inc_not_disabled() to race with jump_label_update(). A low-privileged local user must exercise TCP-AO during the timing window; the invalid jump-label patch triggers a kernel BUG and service interruption.

The record

CVE
CVE-2024-43887
Published
Aug 26, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 26, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.7
  2. Affected versionversion=67fa83f7c86a86913ab9cd5a13b4bebd8d2ebb43 <14ab4792ee120c022f276a7e4768f4dcb08f0cdd
  3. Affected versionversion=67fa83f7c86a86913ab9cd5a13b4bebd8d2ebb43 <954d55a59b2501f4a9bd693b40ce45a1c46cb2b3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.7; version=67fa83f7c86a86913ab9cd5a13b4bebd8d2ebb43 <14ab4792ee120c022f276a7e4768f4dcb08f0cdd; version=67fa83f7c86a86913ab9cd5a13b4bebd8d2ebb43 <954d55a59b2501f4a9bd693b40ce45a1c46cb2b3

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/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 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

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