CVE-2022-49279

Service interruption via XDR array length overflow

Published Feb 26, 2025 · Updated Aug 5, 2026

Integer overflow in NFSD in affected 32-bit Linux kernels allows local users to interrupt kernel service through a crafted XDR array. xdr_stream_decode_uint32_array multiplies an untrusted element count by four before xdr_inline_decode without rejecting a wrapped size. Exploitation requires low-privileged local access to a 32-bit kernel; public sources do not identify whether interruption occurs through a crash, hang, or another failure.

CVSS severity5.5
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in NFSD in affected 32-bit Linux kernels allows local users to interrupt kernel service through a crafted XDR array. xdr_stream_decode_uint32_array multiplies an untrusted element count by four before xdr_inline_decode without rejecting a wrapped size. Exploitation requires low-privileged local access to a 32-bit kernel; public sources do not identify whether interruption occurs through a crash, hang, or another failure.

The record

CVE
CVE-2022-49279
Published
Feb 26, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-190, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE 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=37c88763def8474bc0972fbd1adb0d21670104b7 <23a9dbbe0faf124fc4c139615633b9d12a3a89ef
  2. Affected versionversion=37c88763def8474bc0972fbd1adb0d21670104b7 <303cd6173dce0a28d26526c77814eb90a41bd898
  3. Affected versionversion=37c88763def8474bc0972fbd1adb0d21670104b7 <3a2789e8ccb4a3e2a631f6817a2d3bb98b8c4fd8
  4. Affected versionversion=37c88763def8474bc0972fbd1adb0d21670104b7 <79b1c54fc6ce09ee0d5fe088bb3de26ae2150e3c
  5. Affected versionversion=37c88763def8474bc0972fbd1adb0d21670104b7 <7af164fa2f1abc577d357d22d83a2f3490875d7e
  6. Affected versionversion=37c88763def8474bc0972fbd1adb0d21670104b7 <ce1aa09cc14ed625104acc2d487bd92b9a88efe2
  7. Affected versionversion=37c88763def8474bc0972fbd1adb0d21670104b7 <e4195d27306ea468a6dc3a27af6f586709951229
  8. Affected versionversion=4.17

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=37c88763def8474bc0972fbd1adb0d21670104b7 <23a9dbbe0faf124fc4c139615633b9d12a3a89ef; version=37c88763def8474bc0972fbd1adb0d21670104b7 <303cd6173dce0a28d26526c77814eb90a41bd898; version=37c88763def8474bc0972fbd1adb0d21670104b7 <3a2789e8ccb4a3e2a631f6817a2d3bb98b8c4fd8; version=37c88763def8474bc0972fbd1adb0d21670104b7 <79b1c54fc6ce09ee0d5fe088bb3de26ae2150e3c; version=37c88763def8474bc0972fbd1adb0d21670104b7 <7af164fa2f1abc577d357d22d83a2f3490875d7e; version=37c88763def8474bc0972fbd1adb0d21670104b7 <ce1aa09cc14ed625104acc2d487bd92b9a88efe2; version=37c88763def8474bc0972fbd1adb0d21670104b7 <e4195d27306ea468a6dc3a27af6f586709951229; version=4.17

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS: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

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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

CWE-190Integer Overflow or Wraparound
T1499Endpoint Denial of Service

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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