CVE-2023-52900

Local denial of service via corrupt b-tree metadata

Published Aug 21, 2024 · Updated May 11, 2026

Denial of service in Linux kernel nilfs2 allows local users to crash the system by writing through a corrupted filesystem image. The __nilfs_btree_get_block() function returns -ENOENT for an invalid virtual block address, so nilfs_btree_insert() treats incomplete lookup data as a successful missing-block result and dereferences an invalid path. Exploitation requires local access to mount or use a crafted NILFS2 image and perform a write that reaches the faulty insertion path; the bounded consequence is a kernel crash.

CVSS severity5.5
Medium
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

Denial of service in Linux kernel nilfs2 allows local users to crash the system by writing through a corrupted filesystem image. The __nilfs_btree_get_block() function returns -ENOENT for an invalid virtual block address, so nilfs_btree_insert() treats incomplete lookup data as a successful missing-block result and dereferences an invalid path. Exploitation requires local access to mount or use a crafted NILFS2 image and perform a write that reaches the faulty insertion path; the bounded consequence is a kernel crash.

The record

CVE
CVE-2023-52900
Published
Aug 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 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=2.6.30
  2. Affected versionversion=a60be987d45dd510aeb54389526f9957cfab106c <0bf463939c09e5b2c35c71ed74a5fd60a74d6a04
  3. Affected versionversion=a60be987d45dd510aeb54389526f9957cfab106c <3c2a2ff67d46106715c2132021b98bd057c27545
  4. Affected versionversion=a60be987d45dd510aeb54389526f9957cfab106c <45627a1a6450662e1e0f8174ef07b05710a20062
  5. Affected versionversion=a60be987d45dd510aeb54389526f9957cfab106c <712bd74eccb9d3626a0a236641962eca8e11a243
  6. Affected versionversion=a60be987d45dd510aeb54389526f9957cfab106c <7633355e5c7f29c049a9048e461427d1d8ed3051
  7. Affected versionversion=a60be987d45dd510aeb54389526f9957cfab106c <b0ba060d3287108eba17603bee3810e4cf2c272d
  8. Affected versionversion=a60be987d45dd510aeb54389526f9957cfab106c <d9fde9eab1766170ff2ade67d09178d2cfd78749

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.30; version=a60be987d45dd510aeb54389526f9957cfab106c <0bf463939c09e5b2c35c71ed74a5fd60a74d6a04; version=a60be987d45dd510aeb54389526f9957cfab106c <3c2a2ff67d46106715c2132021b98bd057c27545; version=a60be987d45dd510aeb54389526f9957cfab106c <45627a1a6450662e1e0f8174ef07b05710a20062; version=a60be987d45dd510aeb54389526f9957cfab106c <712bd74eccb9d3626a0a236641962eca8e11a243; version=a60be987d45dd510aeb54389526f9957cfab106c <7633355e5c7f29c049a9048e461427d1d8ed3051; version=a60be987d45dd510aeb54389526f9957cfab106c <b0ba060d3287108eba17603bee3810e4cf2c272d; version=a60be987d45dd510aeb54389526f9957cfab106c <d9fde9eab1766170ff2ade67d09178d2cfd78749

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

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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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