CVE-2022-49212

Service interruption via DMA-channel reference leak

Published Feb 26, 2025 · Updated May 11, 2026

Reference-count leak in the Atmel raw-NAND controller in Linux allows local users to interrupt service during failed DMA setup. The atmel_nand_controller_init error paths return without releasing nc->dmac after dma_request_channel increments its reference count. Reachability requires the Atmel raw-NAND driver, compatible hardware, and a DMA-channel request failure during controller initialization; repeated failures exhaust resources and disrupt availability.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reference-count leak in the Atmel raw-NAND controller in Linux allows local users to interrupt service during failed DMA setup. The atmel_nand_controller_init error paths return without releasing nc->dmac after dma_request_channel increments its reference count. Reachability requires the Atmel raw-NAND driver, compatible hardware, and a DMA-channel request failure during controller initialization; repeated failures exhaust resources and disrupt availability.

The record

CVE
CVE-2022-49212
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE 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=4.12
  2. Affected versionversion=f88fc122cc34c2545dec9562eaab121494e401ef <0856bf27057561f42b37df111603cf5a0d040294
  3. Affected versionversion=f88fc122cc34c2545dec9562eaab121494e401ef <8baea2b96fa90af8d0f937caf4cf2105ee094d93
  4. Affected versionversion=f88fc122cc34c2545dec9562eaab121494e401ef <9843c9c98f26c6ad843260b19bfdaa2598f2ae1e
  5. Affected versionversion=f88fc122cc34c2545dec9562eaab121494e401ef <9b08d211db4c447eb1a07df65e45e0aa772e0fa6
  6. Affected versionversion=f88fc122cc34c2545dec9562eaab121494e401ef <a3587259ae553e41d1ce8c7435351a5d6b299a11
  7. Affected versionversion=f88fc122cc34c2545dec9562eaab121494e401ef <f1694169f3674cdf7553aed06864254635679878
  8. Affected versionversion=f88fc122cc34c2545dec9562eaab121494e401ef <fe0e2ce5c87e9c0b9485ff566362030aa55972cf
  9. Affected versionversion=f88fc122cc34c2545dec9562eaab121494e401ef <fecbd4a317c95d73c849648c406bcf1b6a0ec1cf

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.12; version=f88fc122cc34c2545dec9562eaab121494e401ef <0856bf27057561f42b37df111603cf5a0d040294; version=f88fc122cc34c2545dec9562eaab121494e401ef <8baea2b96fa90af8d0f937caf4cf2105ee094d93; version=f88fc122cc34c2545dec9562eaab121494e401ef <9843c9c98f26c6ad843260b19bfdaa2598f2ae1e; version=f88fc122cc34c2545dec9562eaab121494e401ef <9b08d211db4c447eb1a07df65e45e0aa772e0fa6; version=f88fc122cc34c2545dec9562eaab121494e401ef <a3587259ae553e41d1ce8c7435351a5d6b299a11; version=f88fc122cc34c2545dec9562eaab121494e401ef <f1694169f3674cdf7553aed06864254635679878; version=f88fc122cc34c2545dec9562eaab121494e401ef <fe0e2ce5c87e9c0b9485ff566362030aa55972cf; version=f88fc122cc34c2545dec9562eaab121494e401ef <fecbd4a317c95d73c849648c406bcf1b6a0ec1cf

Published CVSS scores

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 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

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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