CVE-2022-50348

Service interruption via NFSD error-path memory leak

Published Sep 16, 2025 · Updated Sep 16, 2025

Memory leak in Linux kernel NFSD allows local users to interrupt service through kernel-memory exhaustion after a failed allocation. The __cld_pipe_inprogress_downcall function returns after the princhash memdup_user failure without freeing the previously allocated name.data buffer. Repeatedly reaching this local error path can drain kernel memory and interrupt availability; no data disclosure or modification is reported.

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

What happened

Memory leak in Linux kernel NFSD allows local users to interrupt service through kernel-memory exhaustion after a failed allocation. The __cld_pipe_inprogress_downcall function returns after the princhash memdup_user failure without freeing the previously allocated name.data buffer. Repeatedly reaching this local error path can drain kernel memory and interrupt availability; no data disclosure or modification is reported.

The record

CVE
CVE-2022-50348
Published
Sep 16, 2025
Updated
Sep 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2025Record 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=5.4
  2. Affected versionversion=6ee95d1c899186c0798cafd25998d436bcdb9618 <733dd17158f96aaa25408dc39bbb2738fda9300e
  3. Affected versionversion=6ee95d1c899186c0798cafd25998d436bcdb9618 <acc393aecda05bf64ed13b732931462e07a1bf08
  4. Affected versionversion=6ee95d1c899186c0798cafd25998d436bcdb9618 <aed8816305575b38dcc77feb6f1bc1d0ed32f5b8
  5. Affected versionversion=6ee95d1c899186c0798cafd25998d436bcdb9618 <cc3bca2110ac85cd964da997ef83d84cab0d49fb
  6. Affected versionversion=6ee95d1c899186c0798cafd25998d436bcdb9618 <e060c4b9f33c1fca74df26d57a98e784295327e6
  7. Affected versionversion=6ee95d1c899186c0798cafd25998d436bcdb9618 <fd1ef88049de09bc70d60b549992524cfc0e66ff

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.4; version=6ee95d1c899186c0798cafd25998d436bcdb9618 <733dd17158f96aaa25408dc39bbb2738fda9300e; version=6ee95d1c899186c0798cafd25998d436bcdb9618 <acc393aecda05bf64ed13b732931462e07a1bf08; version=6ee95d1c899186c0798cafd25998d436bcdb9618 <aed8816305575b38dcc77feb6f1bc1d0ed32f5b8; version=6ee95d1c899186c0798cafd25998d436bcdb9618 <cc3bca2110ac85cd964da997ef83d84cab0d49fb; version=6ee95d1c899186c0798cafd25998d436bcdb9618 <e060c4b9f33c1fca74df26d57a98e784295327e6; version=6ee95d1c899186c0798cafd25998d436bcdb9618 <fd1ef88049de09bc70d60b549992524cfc0e66ff

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.

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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-401Missing Release of Memory after Effective Lifetime
T1499.001OS Exhaustion Flood

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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