CVE-2024-43897

Kernel crash via unchecked GSO checksum offsets

Published Aug 26, 2024 · Updated Aug 5, 2026

Improper input validation in the Linux kernel allows local users to crash the system via crafted GSO checksum metadata. The virtio_net_hdr_to_skb path accepts csum_start and csum_offset values that remain invalid after TSO or USO segmentation, causing skb_checksum_help to process an offset beyond the segment's linear buffer. Reachability requires local access to AF_PACKET, TUN/TAP, or vhost-net; the demonstrated warning can panic kernels configured to panic on warnings.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in the Linux kernel allows local users to crash the system via crafted GSO checksum metadata. The virtio_net_hdr_to_skb path accepts csum_start and csum_offset values that remain invalid after TSO or USO segmentation, causing skb_checksum_help to process an offset beyond the segment's linear buffer. Reachability requires local access to AF_PACKET, TUN/TAP, or vhost-net; the demonstrated warning can panic kernels configured to panic on warnings.

The record

CVE
CVE-2024-43897
Published
Aug 26, 2024
Updated
Aug 5, 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. 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=27874ca77bd2b05a3779c7b3a5c75d8dd7f0b40f <413e785a89f8bde0d4156a54b8ac2fa003c06756
  2. Affected versionversion=5.15.165 <5.15.167
  3. Affected versionversion=5b1997487a3f3373b0f580c8a20b56c1b64b0775 <f01c5e335fbb7fb612d40f14a3c02e2612a43d3b
  4. Affected versionversion=6.10.3 <6.10.5
  5. Affected versionversion=6.1.103 <6.1.107
  6. Affected versionversion=6.6.44 <6.6.46
  7. Affected versionversion=90d41ebe0cd4635f6410471efc1dd71b33e894cf <6772c4868a8e7ad5305957cdb834ce881793acb7
  8. Affected versionversion=e269d79c7d35aa3808b1f3c1737d63dab504ddc8 <89add40066f9ed9abe5f7f886fe5789ff7e0c50e
  9. Affected versionversion=e9164903b8b303c34723177b02fe91e49e3c4cd7 <2edbb3e8838c672cd7e247e47989df9d03fc6668

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=27874ca77bd2b05a3779c7b3a5c75d8dd7f0b40f <413e785a89f8bde0d4156a54b8ac2fa003c06756; version=5.15.165 <5.15.167; version=5b1997487a3f3373b0f580c8a20b56c1b64b0775 <f01c5e335fbb7fb612d40f14a3c02e2612a43d3b; version=6.10.3 <6.10.5; version=6.1.103 <6.1.107; version=6.6.44 <6.6.46; version=90d41ebe0cd4635f6410471efc1dd71b33e894cf <6772c4868a8e7ad5305957cdb834ce881793acb7; version=e269d79c7d35aa3808b1f3c1737d63dab504ddc8 <89add40066f9ed9abe5f7f886fe5789ff7e0c50e; version=e9164903b8b303c34723177b02fe91e49e3c4cd7 <2edbb3e8838c672cd7e247e47989df9d03fc6668

Published CVSS scores

5.5NVDCVSS: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

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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