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Vulnerabilities

Vulnerability · CVE-2025-40265

In the Linux kernel, the following vulnerability has been resolved: vfat: fix missing sb_min_blocksize() return value checks When emulating an nvme device on qemu with both logical

Published Dec 4, 2025 · catalog updated May 11, 2026 · Linux Linux

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-40265. EPSS is 0.21%. Act only if a listed version of Linux Linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
None0.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.21%
Remediation
Version ranges on file
Affected products
vendor Linux Linux a64e5a596067bddba87fcc2ce37e56c3fca831b7 <ee767b99b0045be286cceb8265bd4c9831be671e

In the Linux kernel, the following vulnerability has been resolved: vfat: fix missing sb_min_blocksize() return value checks When emulating an nvme device on qemu with both logical_block_size and physical_block_size set to 8 KiB, but without format, a kernel panic was triggered during the early boot stage while attempting to mount a vfat filesystem. [95553.682035] EXT4-fs (nvme0n1): unable to set blocksize [95553.684326] EXT4-fs (nvme0n1): unable to set blocksize [95553.686501] EXT4-fs (nvme0n1): unable to set blocksize [95553.696448] ISOFS: unsupported/invalid hardware sector size 8192 [95553

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Linux Linux a64e5a596067bddba87fcc2ce37e56c3fca831b7 <ee767b99b0045be286cceb8265bd4c9831be671ea64e5a596067bddba87fcc2ce37e56c3fca831b7 <ee767b99b0045be286cceb8265bd4c9831be671e

How to fix CVE-2025-40265

  • Upgrade

    CVE-2025-40265 lists a fix boundary at ee767b99b0045be286cceb8265bd4c9831be671e. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in a64e5a596067bddba87fcc2ce37e56c3fca831b7 <ee767b99b0045be286cceb8265bd4c9831be671e

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-40265. EPSS is 0.21%. Act only if a listed version of Linux Linux is installed.

Which versions are affected?

Compare what you have installed with Linux Linux a64e5a596067bddba87fcc2ce37e56c3fca831b7 <ee767b99b0045be286cceb8265bd4c9831be671e a64e5a596067bddba87fcc2ce37e56c3fca831b7 <ee767b99b0045be286cceb8265bd4c9831be671e. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.21%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 4, 2025 · EUVD

    Detected

    In the Linux kernel, the following vulnerability has been resolved: vfat: fix missing sb_min_blocksize() return value checks When emulating an nvme device on qemu with both logical_block_size and physical_block_size set to 8 KiB, but without format, a kernel panic was triggered during the early boot stage while attempting to mount a vfat filesystem. [95553.682035] EXT4-fs (nvme0n1): unable to set

  2. May 11, 2026 · EUVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: vfat: fix missing sb_min_blocksize() return value checks When emulating an nvme device on qemu with both logical_block_size and physical_block_size set to 8 KiB, but without format, a kernel panic was triggered during the early boot stage while attempting to mount a vfat filesystem. [95553.682035] EXT4-fs (nvme0n1): unable to set

Sources

  • CVE.orgVulnerability recordCVE-2025-40265

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-40265

    30-day exploitation probability 0.21%

    first.org
  • EUVDVulnerability recordEUVD-2025-201192

    In the Linux kernel, the following vulnerability has been resolved: vfat: fix missing sb_min_blocksize() return value checks When emulating an nvme device on qemu with both logical_block_size and physical_block_size set to 8 KiB, but without format, a kernel panic was triggered d

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 4, 2026
  • CVE.orgOct 26, 2026
  • EUVDOct 26, 2026