CVE-2022-48890

I/O denial via leaked swiotlb bounce buffers

Published Aug 21, 2024 · Updated May 11, 2026

Memory leak in the StorVSC SCSI driver in Linux 5.17 through 6.1.6 allows local users to interrupt guest I/O under heavy load. storvsc_queuecommand() maps a scatter/gather list with scsi_dma_map(), but an error from storvsc_do_io() returns without scsi_dma_unmap(), leaving swiotlb bounce buffers allocated across retries. The failure requires a confidential VM, or swiotlb=force in a conventional VM, and repeated submission errors can exhaust bounce-buffer memory until the guest cannot perform I/O.

CVSS severity5.5
Medium
EPSS probability0.21%
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 the StorVSC SCSI driver in Linux 5.17 through 6.1.6 allows local users to interrupt guest I/O under heavy load. storvsc_queuecommand() maps a scatter/gather list with scsi_dma_map(), but an error from storvsc_do_io() returns without scsi_dma_unmap(), leaving swiotlb bounce buffers allocated across retries. The failure requires a confidential VM, or swiotlb=force in a conventional VM, and repeated submission errors can exhaust bounce-buffer memory until the guest cannot perform I/O.

The record

CVE
CVE-2022-48890
Published
Aug 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. Aug 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=5.17
  2. Affected versionversion=743b237c3a7b0f5b44aa704aae8a1058877b6322 <67ff3d0a49f3d445c3922e30a54e03c161da561e
  3. Affected versionversion=743b237c3a7b0f5b44aa704aae8a1058877b6322 <87c71e88f6a6619ffb1ff88f84dff48ef6d57adb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.17; version=743b237c3a7b0f5b44aa704aae8a1058877b6322 <67ff3d0a49f3d445c3922e30a54e03c161da561e; version=743b237c3a7b0f5b44aa704aae8a1058877b6322 <87c71e88f6a6619ffb1ff88f84dff48ef6d57adb

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.

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-401Missing Release of Memory after Effective Lifetime
T1499.004Application or System Exploitation

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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