CVE-2022-48853

Local information disclosure via uninitialized swiotlb bounce buffer

Published Jul 16, 2024 · Updated May 11, 2026

Information disclosure in Linux 2.6.12 through 5.17 allows local users to read prior I/O data through a crafted SG_IO request. For a DMA_FROM_DEVICE mapping that the device does not overwrite, swiotlb copies stale bounce-buffer contents back instead of preserving the initialized input. Reachability requires access to an SG_IO device using swiotlb bounce buffering, as in a protected virtio-scsi guest; exposure is limited to residual I/O data.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Linux 2.6.12 through 5.17 allows local users to read prior I/O data through a crafted SG_IO request. For a DMA_FROM_DEVICE mapping that the device does not overwrite, swiotlb copies stale bounce-buffer contents back instead of preserving the initialized input. Reachability requires access to an SG_IO device using swiotlb bounce buffering, as in a protected virtio-scsi guest; exposure is limited to residual I/O data.

The record

CVE
CVE-2022-48853
Published
Jul 16, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1005
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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <06cb238b0f7ac1669cb06390704c61794724c191
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7007c894631cf43041dcfa0da7142bbaa7eb673c
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <901c7280ca0d5e2b4a8929fbe0bfb007ac2a6544
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <aaf166f37eb6bb55d81c3e40a2a460c8875c8813
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b2f140a9f980806f572d672e1780acea66b9a25c
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dcead36b19d999d687cd9c99b7f37520d9102b57
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f2141881b530738777c28bb51c62175895c8178b
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f3f2247ac31cb71d1f05f56536df5946c6652f4a
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fd97de9c7b973f46a6103f4170c5efc7b8ef8797
  10. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <06cb238b0f7ac1669cb06390704c61794724c191; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7007c894631cf43041dcfa0da7142bbaa7eb673c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <901c7280ca0d5e2b4a8929fbe0bfb007ac2a6544; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <aaf166f37eb6bb55d81c3e40a2a460c8875c8813; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b2f140a9f980806f572d672e1780acea66b9a25c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dcead36b19d999d687cd9c99b7f37520d9102b57; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f2141881b530738777c28bb51c62175895c8178b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f3f2247ac31cb71d1f05f56536df5946c6652f4a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fd97de9c7b973f46a6103f4170c5efc7b8ef8797; version=2.6.12

Published CVSS scores

5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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

T1005Data from Local System

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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