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Back to active CVEs
High · CVSS 7.1CVE-2023-54285

iomap: Fix possible overflow condition in iomap_write_delalloc_scanCVE-2023-54285

Answer in brief

CVE-2023-54285 records a High severity (CVSS 7.1) vulnerability in iomap: Fix possible overflow condition in iomap_write_delalloc_scan. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Dec 30, 2025Updated Oct 15, 2026Source checked Nov 3, 2026First seen by HOL Aug 5, 2026Material review Oct 15, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.1
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=38be53c3fd7f4f4bd5de319a323d72f9f6beb16d <0c6cf409093f307ee05114f834516730c0da5b21 || >=f43dc4dc3eff028b5ddddd99f3a66c5a6bdd4e78 <5c281b0c5d18c8eeb1cfd5023f4adb153e6d1240 || >=f43dc4dc3eff028b5ddddd99f3a66c5a6bdd4e78 <eee2d2e6ea5550118170dbd5bb1316ceb38455fb || >=6.1.92 <6.1.1620c6cf409093f307ee05114f834516730c0da5b21, 5c281b0c5d18c8eeb1cfd5023f4adb153e6d1240, eee2d2e6ea5550118170dbd5bb1316ceb38455fb, 6.1.162
Linux/Linuxgeneric6.2Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 0c6cf409093f307ee05114f834516730c0da5b21 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Dec 30, 2025

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 5, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: iomap: Fix possible overflow condition in iomap_write_delalloc_scan folio_next_index() returns an unsigned long value which left shifted by PAGE_SHIFT could possibly cause an overflow on 32-bit system. Instead use folio_pos(folio) + folio_size(folio), which does this correctly.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Monitoring Plugins check_icmp: -H argument count overflow leads in setuid-root binaryAlso CWE-787

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-787
Source
CVE List V5
Source checked
Nov 3, 2026
References
3 linked sources
Open source record