CVE-2022-49808

Service interruption via leaked DSA tagger storage

Published May 1, 2025 · Updated May 11, 2026

A memory leak in Linux 5.17 through 6.0.9 and 6.1-rc1 through 6.1-rc5 allows local users to exhaust kernel memory. The normal dsa_switch_teardown path fails to call tag_ops->disconnect for each switch, leaving tagger-owned private or shared storage allocated after teardown. Triggering requires local access and control of an affected DSA switch driver's unbind path; repeated teardown can deplete memory and interrupt service.

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

What happened

A memory leak in Linux 5.17 through 6.0.9 and 6.1-rc1 through 6.1-rc5 allows local users to exhaust kernel memory. The normal dsa_switch_teardown path fails to call tag_ops->disconnect for each switch, leaving tagger-owned private or shared storage allocated after teardown. Triggering requires local access and control of an affected DSA switch driver's unbind path; repeated teardown can deplete memory and interrupt service.

The record

CVE
CVE-2022-49808
Published
May 1, 2025
Updated
May 11, 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 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=5.17
  2. Affected versionversion=7f2973149c22e7a6fee4c0c9fa6b8e4108e9c208 <4e0c19fcb8b5323716140fa82b79aa9f60e60407
  3. Affected versionversion=7f2973149c22e7a6fee4c0c9fa6b8e4108e9c208 <5809fb03942dbac25144db5bebea84fa003ecaca

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.17; version=7f2973149c22e7a6fee4c0c9fa6b8e4108e9c208 <4e0c19fcb8b5323716140fa82b79aa9f60e60407; version=7f2973149c22e7a6fee4c0c9fa6b8e4108e9c208 <5809fb03942dbac25144db5bebea84fa003ecaca

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

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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