CVE-2022-49020

Local service interruption via leaked 9P sockets

Published Oct 21, 2024 · Updated May 11, 2026

Resource leak in the 9P transport of affected Linux kernel branches allows local users to interrupt service by exhausting sockets. If p9_trans_fd creation fails after p9_socket_open succeeds, p9_fd_create_tcp and p9_fd_create_unix return without releasing the opened socket. Local low-privileged access and a p9_trans_fd allocation failure are required; repeated triggering consumes socket resources and interrupts availability.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leak in the 9P transport of affected Linux kernel branches allows local users to interrupt service by exhausting sockets. If p9_trans_fd creation fails after p9_socket_open succeeds, p9_fd_create_tcp and p9_fd_create_unix return without releasing the opened socket. Local low-privileged access and a p9_trans_fd allocation failure are required; repeated triggering consumes socket resources and interrupts availability.

The record

CVE
CVE-2022-49020
Published
Oct 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE 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=2.6.33
  2. Affected versionversion=6b18662e239a032f908b7f6e164bdf7e2e0a32c9 <0396227f4daf4792a6a8aaa3b7771dc25c4cd443
  3. Affected versionversion=6b18662e239a032f908b7f6e164bdf7e2e0a32c9 <2d24d91b9f44620824fc37b766f7cae00ca32748
  4. Affected versionversion=6b18662e239a032f908b7f6e164bdf7e2e0a32c9 <8782b32ef867de7981bbe9e86ecb90e92e8780bd
  5. Affected versionversion=6b18662e239a032f908b7f6e164bdf7e2e0a32c9 <8b14bd0b500aec1458b51cb621c8e5fab3304260
  6. Affected versionversion=6b18662e239a032f908b7f6e164bdf7e2e0a32c9 <aa08323fe18cb7cf95317ffa2d54ca1de8e74ebd
  7. Affected versionversion=6b18662e239a032f908b7f6e164bdf7e2e0a32c9 <dcc14cfd7debe11b825cb077e75d91d2575b4cb8
  8. Affected versionversion=6b18662e239a032f908b7f6e164bdf7e2e0a32c9 <ded893965b895b2dccd3d1436d8d3daffa23ea64
  9. Affected versionversion=6b18662e239a032f908b7f6e164bdf7e2e0a32c9 <e01c1542379fb395e7da53706df598f38905dfbf

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.33; version=6b18662e239a032f908b7f6e164bdf7e2e0a32c9 <0396227f4daf4792a6a8aaa3b7771dc25c4cd443; version=6b18662e239a032f908b7f6e164bdf7e2e0a32c9 <2d24d91b9f44620824fc37b766f7cae00ca32748; version=6b18662e239a032f908b7f6e164bdf7e2e0a32c9 <8782b32ef867de7981bbe9e86ecb90e92e8780bd; version=6b18662e239a032f908b7f6e164bdf7e2e0a32c9 <8b14bd0b500aec1458b51cb621c8e5fab3304260; version=6b18662e239a032f908b7f6e164bdf7e2e0a32c9 <aa08323fe18cb7cf95317ffa2d54ca1de8e74ebd; version=6b18662e239a032f908b7f6e164bdf7e2e0a32c9 <dcc14cfd7debe11b825cb077e75d91d2575b4cb8; version=6b18662e239a032f908b7f6e164bdf7e2e0a32c9 <ded893965b895b2dccd3d1436d8d3daffa23ea64; version=6b18662e239a032f908b7f6e164bdf7e2e0a32c9 <e01c1542379fb395e7da53706df598f38905dfbf

Published CVSS scores

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

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 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

CWE-401Missing Release of Memory after Effective Lifetime
T1499.004Application 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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