CVE-2023-54285

Incorrect filesystem range handling via offset overflow

Published Dec 30, 2025 · Updated Dec 30, 2025

Integer overflow in affected Linux kernel releases allows local users to trigger incorrect filesystem range handling on 32-bit systems. In iomap_write_delalloc_scan, shifting the unsigned-long result of folio_next_index() by PAGE_SHIFT truncates the next-folio byte position. The wrong value can set an incorrect delayed-allocation punch offset; affected ranges are 6.1.92 through 6.1.161 and 6.2 through 6.5.4.

CVSS severity7.1
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in affected Linux kernel releases allows local users to trigger incorrect filesystem range handling on 32-bit systems. In iomap_write_delalloc_scan, shifting the unsigned-long result of folio_next_index() by PAGE_SHIFT truncates the next-folio byte position. The wrong value can set an incorrect delayed-allocation punch offset; affected ranges are 6.1.92 through 6.1.161 and 6.2 through 6.5.4.

The record

CVE
CVE-2023-54285
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5c281b0c5d18c8eeb1cfd5023f4adb153e6d1240
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <eee2d2e6ea5550118170dbd5bb1316ceb38455fb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5c281b0c5d18c8eeb1cfd5023f4adb153e6d1240; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <eee2d2e6ea5550118170dbd5bb1316ceb38455fb

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.1Linux kernel CVE teamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/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

CWE-787Out-of-bounds Write
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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