CVE-2022-50055

Service interruption via leaked VF mailbox DMA buffers

Published Jun 18, 2025 · Updated May 11, 2026

Memory leak in the Linux kernel iavf driver allows local users to exhaust DMA memory through failed VF mailbox setup and interface unload. The ASQ and ARQ allocation helpers leave dma_alloc_coherent buffers allocated when admin-queue register configuration fails. Triggering the flaw requires an iavf virtual function and a configuration failure before interface unload; repeated failures can reduce system availability.

CVSS severity5.5
Medium
EPSS probability0.18%
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 Linux kernel iavf driver allows local users to exhaust DMA memory through failed VF mailbox setup and interface unload. The ASQ and ARQ allocation helpers leave dma_alloc_coherent buffers allocated when admin-queue register configuration fails. Triggering the flaw requires an iavf virtual function and a configuration failure before interface unload; repeated failures can reduce system availability.

The record

CVE
CVE-2022-50055
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.14
  2. Affected versionversion=d358aa9a7a2d5f91b1d33d5d4e27c2e46638d123 <35c63581fdefdcbaeae8cded18908523252353ad
  3. Affected versionversion=d358aa9a7a2d5f91b1d33d5d4e27c2e46638d123 <419831617ed349992c84344dbd9e627f9e68f842
  4. Affected versionversion=d358aa9a7a2d5f91b1d33d5d4e27c2e46638d123 <4fe80492d53971d9a49f39f3c86d2d67c6f3638a
  5. Affected versionversion=d358aa9a7a2d5f91b1d33d5d4e27c2e46638d123 <dab6b551f5ba4c79a0dd4970dd8533c37a7b100f
  6. Affected versionversion=d358aa9a7a2d5f91b1d33d5d4e27c2e46638d123 <ff289f2be5899efd0e897d2b434a78e36df2c69b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.14; version=d358aa9a7a2d5f91b1d33d5d4e27c2e46638d123 <35c63581fdefdcbaeae8cded18908523252353ad; version=d358aa9a7a2d5f91b1d33d5d4e27c2e46638d123 <419831617ed349992c84344dbd9e627f9e68f842; version=d358aa9a7a2d5f91b1d33d5d4e27c2e46638d123 <4fe80492d53971d9a49f39f3c86d2d67c6f3638a; version=d358aa9a7a2d5f91b1d33d5d4e27c2e46638d123 <dab6b551f5ba4c79a0dd4970dd8533c37a7b100f; version=d358aa9a7a2d5f91b1d33d5d4e27c2e46638d123 <ff289f2be5899efd0e897d2b434a78e36df2c69b

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/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

T1499Endpoint Denial of Service

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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