CVE-2022-48902

Kernel panic via stale extent-buffer warning

Published Aug 22, 2024 · Updated May 11, 2026

Race condition in Linux btrfs 3.4 through 5.15.26 and 5.16 through 5.16.12 allows local users to trigger a kernel warning. The assert_eb_page_uptodate function warns whenever an extent-buffer page lacks Uptodate, even when a failed write has set PageError and invalidated a buffer already in use. Reaching the race requires local btrfs activity during writeback; the warning floods kernel logs and becomes a kernel panic when panic_on_warn is enabled.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Linux btrfs 3.4 through 5.15.26 and 5.16 through 5.16.12 allows local users to trigger a kernel warning. The assert_eb_page_uptodate function warns whenever an extent-buffer page lacks Uptodate, even when a failed write has set PageError and invalidated a buffer already in use. Reaching the race requires local btrfs activity during writeback; the warning floods kernel logs and becomes a kernel panic when panic_on_warn is enabled.

The record

CVE
CVE-2022-48902
Published
Aug 22, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 22, 2024CVE 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=0b32f4bbb423f02acee6d43cd442f5f0775db7e0 <9efcc83b33b576302147634eca9bece8e3737e34
  2. Affected versionversion=0b32f4bbb423f02acee6d43cd442f5f0775db7e0 <a50e1fcbc9b85fd4e95b89a75c0884cb032a3e06
  3. Affected versionversion=0b32f4bbb423f02acee6d43cd442f5f0775db7e0 <e00077aa439f0e8f416699fa4e9600db6583db70
  4. Affected versionversion=3.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0b32f4bbb423f02acee6d43cd442f5f0775db7e0 <9efcc83b33b576302147634eca9bece8e3737e34; version=0b32f4bbb423f02acee6d43cd442f5f0775db7e0 <a50e1fcbc9b85fd4e95b89a75c0884cb032a3e06; version=0b32f4bbb423f02acee6d43cd442f5f0775db7e0 <e00077aa439f0e8f416699fa4e9600db6583db70; version=3.4

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 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

T1499.004Endpoint Denial of Service: Application or System Exploitation

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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