CVE-2022-49861

Service interruption via unbalanced DMA clock cleanup

Published May 1, 2025 · Updated May 23, 2026

Resource leakage in the Linux kernel mv_xor_v2 DMA driver allows local users to interrupt service by repeatedly removing the device. The mv_xor_v2_remove() path omits clk_disable_unprepare() after probe enables the clock with clk_prepare_enable(), so device removal leaves the clock resource enabled. Reachability requires local access and removal of a Marvell XOR v2 DMA device; published assessments report availability impact only, not data access or modification.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leakage in the Linux kernel mv_xor_v2 DMA driver allows local users to interrupt service by repeatedly removing the device. The mv_xor_v2_remove() path omits clk_disable_unprepare() after probe enables the clock with clk_prepare_enable(), so device removal leaves the clock resource enabled. Reachability requires local access and removal of a Marvell XOR v2 DMA device; published assessments report availability impact only, not data access or modification.

The record

CVE
CVE-2022-49861
Published
May 1, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2025CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=2299285fb1819ef8459c116fd1eafe1458bb9ca1 <4b6641c3a2ba95ddcfecec263b4a5e572a4b0641
  2. Affected versionversion=3bdcced41936b054470639c6a76ae033df1074e3 <04f2cc56d80a1ac058045a7835c5bfd910f17863
  3. Affected versionversion=3cd2c313f1d618f92d1294addc6c685c17065761 <081195d17a0c4c636da2b869bd5809d42e8cbb13
  4. Affected versionversion=3cd2c313f1d618f92d1294addc6c685c17065761 <0b7ee3d50f32d277bf024b4ddb4de54da43a3025
  5. Affected versionversion=3cd2c313f1d618f92d1294addc6c685c17065761 <1d84887327659c58a6637060ac8c50c3a952a163
  6. Affected versionversion=3cd2c313f1d618f92d1294addc6c685c17065761 <20479886b40c0ed4864a5fc8490a1f6b70cccf1b
  7. Affected versionversion=3cd2c313f1d618f92d1294addc6c685c17065761 <992e966caf57e00855edbd79f19d911809732a69
  8. Affected versionversion=3cd2c313f1d618f92d1294addc6c685c17065761 <a1cb72e20a64a3c83f9b4ee993fbf97e4c1d7714
  9. Affected versionversion=4.14.45 <4.14.300
  10. Affected versionversion=4.16
  11. Affected versionversion=4.9.104 <4.9.334

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2299285fb1819ef8459c116fd1eafe1458bb9ca1 <4b6641c3a2ba95ddcfecec263b4a5e572a4b0641; version=3bdcced41936b054470639c6a76ae033df1074e3 <04f2cc56d80a1ac058045a7835c5bfd910f17863; version=3cd2c313f1d618f92d1294addc6c685c17065761 <081195d17a0c4c636da2b869bd5809d42e8cbb13; version=3cd2c313f1d618f92d1294addc6c685c17065761 <0b7ee3d50f32d277bf024b4ddb4de54da43a3025; version=3cd2c313f1d618f92d1294addc6c685c17065761 <1d84887327659c58a6637060ac8c50c3a952a163; version=3cd2c313f1d618f92d1294addc6c685c17065761 <20479886b40c0ed4864a5fc8490a1f6b70cccf1b; version=3cd2c313f1d618f92d1294addc6c685c17065761 <992e966caf57e00855edbd79f19d911809732a69; version=3cd2c313f1d618f92d1294addc6c685c17065761 <a1cb72e20a64a3c83f9b4ee993fbf97e4c1d7714; version=4.14.45 <4.14.300; version=4.16; version=4.9.104 <4.9.334

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS: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.

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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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