CVE-2024-43878Network attack vector

Kernel panic via stale XFRM state pointer

Published Aug 21, 2024 · Updated Aug 5, 2026

Out-of-bounds read in Linux 6.10 allows remote attackers to crash the host with a crafted IPsec packet under a misconfigured XFRM state. On a state-direction mismatch, xfrm_input releases the XFRM state but leaves the packet security path and state pointer intact for receive callbacks to dereference. The host must have a matching misconfigured XFRM security association; no credentials or user interaction are required for a matching packet to panic the kernel.

CVSS severity8.1
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Linux 6.10 allows remote attackers to crash the host with a crafted IPsec packet under a misconfigured XFRM state. On a state-direction mismatch, xfrm_input releases the XFRM state but leaves the packet security path and state pointer intact for receive callbacks to dereference. The host must have a matching misconfigured XFRM security association; no credentials or user interaction are required for a matching packet to panic the kernel.

The record

CVE
CVE-2024-43878
Published
Aug 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=304b44f0d5a4c2f91f82f7c31538d00485fb484c <54fcc6189dfb822eea984fa2b3e477a02447279d
  2. Affected versionversion=304b44f0d5a4c2f91f82f7c31538d00485fb484c <a4c10813bc394ff2b5c61f913971be216f8f8834
  3. Affected versionversion=6.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=304b44f0d5a4c2f91f82f7c31538d00485fb484c <54fcc6189dfb822eea984fa2b3e477a02447279d; version=304b44f0d5a4c2f91f82f7c31538d00485fb484c <a4c10813bc394ff2b5c61f913971be216f8f8834; version=6.10

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
8.1kernel.orgCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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

CWE-125Out-of-bounds Read
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

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Your stack

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