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CVE-2024-43887

16
FAUCET Score

CVE-2024-43887 is a Linux kernel vulnerability affecting the TCP-AO (TCP Authentication Option) static key mechanism. It arises when the RCU grace period for tcp_ao_info is delayed, leading to a race condition where the static key can be disabled while still being accessed, causing a kernel bug. This vulnerability has a Medium severity rating (CVSS 4.7) with a local attack vector and high impact on availability, potentially leading to a denial of service. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 6.7, < 6.10.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
6.11CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*
6.11CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.7MEDIUM

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.0
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.19%
Probability of exploitation in next 30 days
EPSS Percentile
8.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0019 is in the 47th percentile among its peer group of 1,297 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.4 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

codesyspatch availablevia llm_extracted
View patch
esphomepatch availablevia llm_extracted
View patch

Vendor Advisories (3)

codesysllm-codesys-fe85e88fbae25bb9CRITICAL

HP ThinPro 8.1 SP7 Security Updates

Jun 3, 2025
esphomellm-esphome-ed450ce9fd6a7380CRITICAL

HP ThinPro 8.1 SP7 Security Updates

Jun 3, 2025
redhatCVE-2024-43887Low

kernel: net/tcp: Disable TCP-AO static key after RCU grace period

Aug 26, 2024

References

git.kernel.org / stable/c/14ab4792ee120c022f276a7e4768f4dcb08f0cdd
Patch
git.kernel.org / stable/c/954d55a59b2501f4a9bd693b40ce45a1c46cb2b3
Patch