CVE-2022-48773

Local denial of service via stale error pointers

Published Jul 16, 2024 · Updated May 11, 2026

NULL-pointer dereference in affected Linux kernels allows local users to trigger a kernel Oops and interrupt service through XPRT-RDMA. Error exits in rpcrdma_ep_create leave non-NULL endpoint resource pointers holding error values, and rpcrdma_ep_destroy later treats them as valid objects and frees them. The path requires local low-privilege access and an XPRT-RDMA endpoint-creation failure; the resulting Oops disrupts availability.

CVSS severity5.5
Medium
EPSS probability0.25%
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 affected Linux kernels allows local users to trigger a kernel Oops and interrupt service through XPRT-RDMA. Error exits in rpcrdma_ep_create leave non-NULL endpoint resource pointers holding error values, and rpcrdma_ep_destroy later treats them as valid objects and frees them. The path requires local low-privilege access and an XPRT-RDMA endpoint-creation failure; the resulting Oops disrupts availability.

The record

CVE
CVE-2022-48773
Published
Jul 16, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 16, 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=5.7
  2. Affected versionversion=85cd8e2b78eea7374927750ffec60bf047f8f90b <1e7433fb95ccc01629a5edaa4ced0cd8c98d0ae0
  3. Affected versionversion=85cd8e2b78eea7374927750ffec60bf047f8f90b <2526d4d8b209dc5ac1fbeb468149774888b2a141
  4. Affected versionversion=85cd8e2b78eea7374927750ffec60bf047f8f90b <9921c866dc369577c3ebb9adf2383b01b58c18de
  5. Affected versionversion=85cd8e2b78eea7374927750ffec60bf047f8f90b <a9c10b5b3b67b3750a10c8b089b2e05f5e176e33

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.7; version=85cd8e2b78eea7374927750ffec60bf047f8f90b <1e7433fb95ccc01629a5edaa4ced0cd8c98d0ae0; version=85cd8e2b78eea7374927750ffec60bf047f8f90b <2526d4d8b209dc5ac1fbeb468149774888b2a141; version=85cd8e2b78eea7374927750ffec60bf047f8f90b <9921c866dc369577c3ebb9adf2383b01b58c18de; version=85cd8e2b78eea7374927750ffec60bf047f8f90b <a9c10b5b3b67b3750a10c8b089b2e05f5e176e33

Published CVSS scores

5.5Amazon LinuxCVSS: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
5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS: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

CWE-476NULL Pointer Dereference
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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