CVE-2022-49358

Local service interruption via leaked flow rules

Published Feb 26, 2025 · Updated May 11, 2026

Memory leak in the Linux kernel nf_tables hardware-offload path allows local users to exhaust memory through rule transactions. The commit and commit-release paths destroy a transaction without destroying its flow-rule object when hardware offload is set. Low-privilege local access and an offloaded nftables chain are required; repeated transactions consume kernel memory and can interrupt service.

CVSS severity5.5
Medium
EPSS probability0.28%
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 nf_tables hardware-offload path allows local users to exhaust memory through rule transactions. The commit and commit-release paths destroy a transaction without destroying its flow-rule object when hardware offload is set. Low-privilege local access and an offloaded nftables chain are required; repeated transactions consume kernel memory and can interrupt service.

The record

CVE
CVE-2022-49358
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.003
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=5.3
  2. Affected versionversion=c9626a2cbdb20e26587b3fad99960520a023432b <330c0c6cd2150a2d7f47af16aa590078b0d2f736
  3. Affected versionversion=c9626a2cbdb20e26587b3fad99960520a023432b <5b8d63489c3b701eb2a76f848ec94d8cbc9373b9
  4. Affected versionversion=c9626a2cbdb20e26587b3fad99960520a023432b <80de9ea1f5b808a6601e91111fae601df2b26369
  5. Affected versionversion=c9626a2cbdb20e26587b3fad99960520a023432b <9dd732e0bdf538b1b76dc7c157e2b5e560ff30d3
  6. Affected versionversion=c9626a2cbdb20e26587b3fad99960520a023432b <ab9f34a30c23f656e76f4c5b83125a4e7b53c86e
  7. Affected versionversion=c9626a2cbdb20e26587b3fad99960520a023432b <e33d9bd563e71f6c6528b96008d65524a459c4dc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.3; version=c9626a2cbdb20e26587b3fad99960520a023432b <330c0c6cd2150a2d7f47af16aa590078b0d2f736; version=c9626a2cbdb20e26587b3fad99960520a023432b <5b8d63489c3b701eb2a76f848ec94d8cbc9373b9; version=c9626a2cbdb20e26587b3fad99960520a023432b <80de9ea1f5b808a6601e91111fae601df2b26369; version=c9626a2cbdb20e26587b3fad99960520a023432b <9dd732e0bdf538b1b76dc7c157e2b5e560ff30d3; version=c9626a2cbdb20e26587b3fad99960520a023432b <ab9f34a30c23f656e76f4c5b83125a4e7b53c86e; version=c9626a2cbdb20e26587b3fad99960520a023432b <e33d9bd563e71f6c6528b96008d65524a459c4dc

Published CVSS scores

5.5SUSECVSS: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
6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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

CWE-401Missing Release of Memory after Effective Lifetime
T1499.003Application Exhaustion Flood

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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