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CVE-2026-74307VulnerabilityPublished Updated

EXT4_IOC_MOVE_EXT · ext4: validate donor file superblock early

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-74307· Medium

Not known to be exploited · fixed in fb52013cad9e9b7d3a6a14ea1bcd841e41da7c6c : update Microsoft when convenient.

Data as of 7 Nov 2026, 12:32 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in fb52013cad9e9b7d3a6a14ea1bcd841e41da7c6c, c143957520c6c9b5cd72e0de8b52b814f0c576fe, 74796e886ca39fcb0d3fd36ea6a39c62784ab6fb +3

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 15 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 7 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ fcf6b1b729bcd23f2b49a84fb33ffbb44712ee6a, < fb52013cad9e9b7d3a6a14ea1bcd841e41da7c6c
Fixed in
  • fb52013cad9e9b7d3a6a14ea1bcd841e41da7c6c
LinuxLinuxAffected
  • ≥ fcf6b1b729bcd23f2b49a84fb33ffbb44712ee6a, < c143957520c6c9b5cd72e0de8b52b814f0c576fe
Fixed in
  • c143957520c6c9b5cd72e0de8b52b814f0c576fe
LinuxLinuxAffected
  • ≥ fcf6b1b729bcd23f2b49a84fb33ffbb44712ee6a, < 74796e886ca39fcb0d3fd36ea6a39c62784ab6fb
Fixed in
  • 74796e886ca39fcb0d3fd36ea6a39c62784ab6fb
LinuxLinuxAffected
  • ≥ fcf6b1b729bcd23f2b49a84fb33ffbb44712ee6a, < 23380fc1bf5d3b75dcbd51eb72be4eb0a3300370
Fixed in
  • 23380fc1bf5d3b75dcbd51eb72be4eb0a3300370
LinuxLinuxAffected
  • ≥ fcf6b1b729bcd23f2b49a84fb33ffbb44712ee6a, < 663f184b51492093d408e518efc95ee13b5b4440
Fixed in
  • 663f184b51492093d408e518efc95ee13b5b4440
LinuxLinuxAffected
  • ≥ fcf6b1b729bcd23f2b49a84fb33ffbb44712ee6a, < 29e07ec352f0ad06c833a18bf47d82c81f55544f
Fixed in
  • 29e07ec352f0ad06c833a18bf47d82c81f55544f

Description

This vulnerability involves the ext4 filesystem where the donor file superblock is not validated early enough in the EXT4_IOC_MOVE_EXT ioctl operation. The issue could potentially lead to improper handling of filesystem metadata during extent moves. The affected version is ext4 version 3.0. No CVSS score or detailed impact information is provided.

References

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