CVE-2022-49497

Kernel crash via fatal checksum offset assertions

Published Feb 26, 2025 · Updated May 11, 2026

Improper validation in skb_checksum_help() in affected Linux kernels allows local users to crash the kernel through invalid checksum offsets. The function applies BUG_ON to checksum-start and checksum-field offsets derived from packet-buffer metadata instead of rejecting offsets outside the linear buffer. Local users with low privileges who reach the checksum helper with malformed packet metadata can trigger a kernel BUG and interrupt the host.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper validation in skb_checksum_help() in affected Linux kernels allows local users to crash the kernel through invalid checksum offsets. The function applies BUG_ON to checksum-start and checksum-field offsets derived from packet-buffer metadata instead of rejecting offsets outside the linear buffer. Local users with low privileges who reach the checksum helper with malformed packet metadata can trigger a kernel BUG and interrupt the host.

The record

CVE
CVE-2022-49497
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE 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

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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=2.6.24
  2. Affected versionversion=a030847e9f0eed2a080f6114381c649a7aa43d25 <312c43e98ed190bd8fd7a71a0addf9539d5b8ab1
  3. Affected versionversion=a030847e9f0eed2a080f6114381c649a7aa43d25 <6320ae1b5876c30bf98203b6a5abe8b5c45e6a04
  4. Affected versionversion=a030847e9f0eed2a080f6114381c649a7aa43d25 <b1320c9a4d30ff54b824a8ad6036e0b5fb4c5e73
  5. Affected versionversion=a030847e9f0eed2a080f6114381c649a7aa43d25 <d5281245f3502e960cb6b89348767b935379cee3
  6. Affected versionversion=a030847e9f0eed2a080f6114381c649a7aa43d25 <d7ea0d9df2a6265b2b180d17ebc64b38105968fc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.24; version=a030847e9f0eed2a080f6114381c649a7aa43d25 <312c43e98ed190bd8fd7a71a0addf9539d5b8ab1; version=a030847e9f0eed2a080f6114381c649a7aa43d25 <6320ae1b5876c30bf98203b6a5abe8b5c45e6a04; version=a030847e9f0eed2a080f6114381c649a7aa43d25 <b1320c9a4d30ff54b824a8ad6036e0b5fb4c5e73; version=a030847e9f0eed2a080f6114381c649a7aa43d25 <d5281245f3502e960cb6b89348767b935379cee3; version=a030847e9f0eed2a080f6114381c649a7aa43d25 <d7ea0d9df2a6265b2b180d17ebc64b38105968fc

Published CVSS scores

5.5CISA-ADPCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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