CVE-2022-48723

DMA reference leakage via SPI probe errors

Published Jun 20, 2024 · Updated May 11, 2026

A reference-count leak in the UniPhier SPI driver in Linux 5.6 through 5.16.7 leaves DMA channel references unreleased. The uniphier_spi_probe() error paths for failed dma_get_slave_caps() or devm_spi_register_master() calls omit dma_release_channel() for both dma_rx and dma_tx. The flaw occurs during UniPhier SPI device probing when either operation fails; public records establish no attacker-controlled trigger beyond those failures.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A reference-count leak in the UniPhier SPI driver in Linux 5.6 through 5.16.7 leaves DMA channel references unreleased. The uniphier_spi_probe() error paths for failed dma_get_slave_caps() or devm_spi_register_master() calls omit dma_release_channel() for both dma_rx and dma_tx. The flaw occurs during UniPhier SPI device probing when either operation fails; public records establish no attacker-controlled trigger beyond those failures.

The record

CVE
CVE-2022-48723
Published
Jun 20, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 20, 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=28d1dddc59f6b7fc085093e7c1e978b33f0caf4c <37c2c83ca4f1ef4b6908181ac98e18360af89b42
  2. Affected versionversion=28d1dddc59f6b7fc085093e7c1e978b33f0caf4c <447c3d4046d7b54052d07d8b27e15e6edea5662c
  3. Affected versionversion=28d1dddc59f6b7fc085093e7c1e978b33f0caf4c <dd00b4f8f768d81c3788a8ac88fdb3d745e55ea3
  4. Affected versionversion=28d1dddc59f6b7fc085093e7c1e978b33f0caf4c <e895e067d73e154b1ebc84a124e00831e311d9b0
  5. Affected versionversion=5.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=28d1dddc59f6b7fc085093e7c1e978b33f0caf4c <37c2c83ca4f1ef4b6908181ac98e18360af89b42; version=28d1dddc59f6b7fc085093e7c1e978b33f0caf4c <447c3d4046d7b54052d07d8b27e15e6edea5662c; version=28d1dddc59f6b7fc085093e7c1e978b33f0caf4c <dd00b4f8f768d81c3788a8ac88fdb3d745e55ea3; version=28d1dddc59f6b7fc085093e7c1e978b33f0caf4c <e895e067d73e154b1ebc84a124e00831e311d9b0; version=5.6

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

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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

No sourced classifications are available.

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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