CVE-2022-48654

Kernel stack disclosure via false OSF match

Published Apr 28, 2024 · Updated Aug 5, 2026

Information disclosure in Linux nfnetlink_osf allows local users to read stale kernel stack data through a crafted nftables OSF rule. On a fingerprint mismatch, nf_osf_find returns true and leaves genre and version data uninitialized, which nft_osf then copies into a userspace-visible register. A local user who can configure the nftables expression and evaluate it with a TCP SYN can disclose kernel memory or interrupt the host.

CVSS severity7.1
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Linux nfnetlink_osf allows local users to read stale kernel stack data through a crafted nftables OSF rule. On a fingerprint mismatch, nf_osf_find returns true and leaves genre and version data uninitialized, which nft_osf then copies into a userspace-visible register. A local user who can configure the nftables expression and evaluate it with a TCP SYN can disclose kernel memory or interrupt the host.

The record

CVE
CVE-2022-48654
Published
Apr 28, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=22c7652cdaa8cd33ce78bacceb4e826a3f795873 <559c36c5a8d730c49ef805a72b213d3bba155cc8
  2. Affected versionversion=22c7652cdaa8cd33ce78bacceb4e826a3f795873 <5d75fef3e61e797fab5c3fbba88caa74ab92ad47
  3. Affected versionversion=22c7652cdaa8cd33ce78bacceb4e826a3f795873 <633c81c0449663f57d4138326d036dc6cfad674e
  4. Affected versionversion=22c7652cdaa8cd33ce78bacceb4e826a3f795873 <721ea8ac063d70c2078c4e762212705de6151764
  5. Affected versionversion=22c7652cdaa8cd33ce78bacceb4e826a3f795873 <816eab147e5c6f6621922b8515ad9010ceb1735e
  6. Affected versionversion=5.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=22c7652cdaa8cd33ce78bacceb4e826a3f795873 <559c36c5a8d730c49ef805a72b213d3bba155cc8; version=22c7652cdaa8cd33ce78bacceb4e826a3f795873 <5d75fef3e61e797fab5c3fbba88caa74ab92ad47; version=22c7652cdaa8cd33ce78bacceb4e826a3f795873 <633c81c0449663f57d4138326d036dc6cfad674e; version=22c7652cdaa8cd33ce78bacceb4e826a3f795873 <721ea8ac063d70c2078c4e762212705de6151764; version=22c7652cdaa8cd33ce78bacceb4e826a3f795873 <816eab147e5c6f6621922b8515ad9010ceb1735e; version=5.2

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.3CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
7.1kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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

CWE-908Use of Uninitialized Resource

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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