CVE-2022-49928Network attack vector

NFS server crash via null sysfs pointer

Published May 1, 2025 · Updated Aug 5, 2026

NULL pointer dereference in Linux kernel SUNRPC 5.14 through 6.0.7 allows remote attackers to crash an NFS server during client setup. rpc_sysfs_client_setup creates links through a null xps_sysfs object after xprt_switch sysfs allocation fails and can later destroy an uninitialized object. Reachability requires an NFS service and the allocation failure; the resulting kernel oops or panic interrupts the host without reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux kernel SUNRPC 5.14 through 6.0.7 allows remote attackers to crash an NFS server during client setup. rpc_sysfs_client_setup creates links through a null xps_sysfs object after xprt_switch sysfs allocation fails and can later destroy an uninitialized object. Reachability requires an NFS service and the allocation failure; the resulting kernel oops or panic interrupts the host without reported data disclosure or modification.

The record

CVE
CVE-2022-49928
Published
May 1, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 1, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.14
  2. Affected versionversion=baea99445dd4675a834e8a5987d2f368adb62e6c <7b189b0aa8dab14b49c31c65af8a982e96e25b62
  3. Affected versionversion=baea99445dd4675a834e8a5987d2f368adb62e6c <cbdeaee94a415800c65a8c3fa04d9664a8b8fb3a
  4. Affected versionversion=baea99445dd4675a834e8a5987d2f368adb62e6c <d59722d088a9d86ce6d9d39979e5d1d669d249f7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=baea99445dd4675a834e8a5987d2f368adb62e6c <7b189b0aa8dab14b49c31c65af8a982e96e25b62; version=baea99445dd4675a834e8a5987d2f368adb62e6c <cbdeaee94a415800c65a8c3fa04d9664a8b8fb3a; version=baea99445dd4675a834e8a5987d2f368adb62e6c <d59722d088a9d86ce6d9d39979e5d1d669d249f7

Published CVSS scores

7.5Linux CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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