CVE-2022-48862Public exploit

Vhost thread hang via zero-size IOTLB mapping

Published Jul 16, 2024 · Updated May 11, 2026

Denial of service in vhost IOTLB handling in affected Linux kernels allows local users to hang a vhost thread via a crafted mapping. vhost_iotlb_add_range_ctx() calculates an inclusive range size that wraps to zero for [0, ULONG_MAX], leaving an erroneous entry that makes iotlb_access_ok() loop indefinitely. A local user able to submit a zero-sized IOTLB mapping through a vhost character device can trigger the hang when a packet is processed.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in vhost IOTLB handling in affected Linux kernels allows local users to hang a vhost thread via a crafted mapping. vhost_iotlb_add_range_ctx() calculates an inclusive range size that wraps to zero for [0, ULONG_MAX], leaving an erroneous entry that makes iotlb_access_ok() loop indefinitely. A local user able to submit a zero-sized IOTLB mapping through a vhost character device can trigger the hang when a packet is processed.

The record

CVE
CVE-2022-48862
Published
Jul 16, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-835, T1499
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

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=0bbe30668d89ec8a309f28ced6d092c90fb23e8c <d9a747e6b6561280bf1791bb24c5e9e082193dad
  2. Affected versionversion=0bbe30668d89ec8a309f28ced6d092c90fb23e8c <e2ae38cf3d91837a493cb2093c87700ff3cbe667
  3. Affected versionversion=0bbe30668d89ec8a309f28ced6d092c90fb23e8c <f8d88e86e90ea1002226d7ac2430152bfea003d1
  4. Affected versionversion=5.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0bbe30668d89ec8a309f28ced6d092c90fb23e8c <d9a747e6b6561280bf1791bb24c5e9e082193dad; version=0bbe30668d89ec8a309f28ced6d092c90fb23e8c <e2ae38cf3d91837a493cb2093c87700ff3cbe667; version=0bbe30668d89ec8a309f28ced6d092c90fb23e8c <f8d88e86e90ea1002226d7ac2430152bfea003d1; version=5.7

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS: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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo