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Vulnerabilities

Vulnerability · CVE-2023-53306

In the Linux kernel, the following vulnerability has been resolved: fsdax: force clear dirty mark if CoW XFS allows CoW on non-shared extents to combat fragmentation[1].

Published Sep 16, 2025 · catalog updated May 11, 2026 · Linux Linux

Check if you run it

No confirmed exploitation is on record for CVE-2023-53306. EPSS is 0.14%. 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.
Severity
Medium5.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.14%
Remediation
Version ranges on file
Affected products
vendor Linux Linux f80e1668888f34c0764822e74953c997daf2ccdb <fac05f800abb63dc4d7cc48fe7edf16e0520dc1f

In the Linux kernel, the following vulnerability has been resolved: fsdax: force clear dirty mark if CoW XFS allows CoW on non-shared extents to combat fragmentation[1]. The old non-shared extent could be mwrited before, its dax entry is marked dirty. This results in a WARNing: [ 28.512349] ------------[ cut here ]------------ [ 28.512622] WARNING: CPU: 2 PID: 5255 at fs/dax.c:390 dax_insert_entry+0x342/0x390 [ 28.513050] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 nfs lockd grace fscache netfs nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv

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 f80e1668888f34c0764822e74953c997daf2ccdb <fac05f800abb63dc4d7cc48fe7edf16e0520dc1ff80e1668888f34c0764822e74953c997daf2ccdb <fac05f800abb63dc4d7cc48fe7edf16e0520dc1f

How to fix CVE-2023-53306

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-2023-53306. EPSS is 0.14%. Act only if a listed version of Linux Linux is installed.

Which versions are affected?

Compare what you have installed with Linux Linux f80e1668888f34c0764822e74953c997daf2ccdb <fac05f800abb63dc4d7cc48fe7edf16e0520dc1f f80e1668888f34c0764822e74953c997daf2ccdb <fac05f800abb63dc4d7cc48fe7edf16e0520dc1f. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.14%. 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. Sep 16, 2025 · EUVD

    Detected

    In the Linux kernel, the following vulnerability has been resolved: fsdax: force clear dirty mark if CoW XFS allows CoW on non-shared extents to combat fragmentation[1]. The old non-shared extent could be mwrited before, its dax entry is marked dirty. This results in a WARNing: [ 28.512349] ------------[ cut here ]------------ [ 28.512622] WARNING: CPU: 2 PID: 5255 at fs/dax.c:390 dax_insert_entry

  2. May 11, 2026 · EUVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: fsdax: force clear dirty mark if CoW XFS allows CoW on non-shared extents to combat fragmentation[1]. The old non-shared extent could be mwrited before, its dax entry is marked dirty. This results in a WARNing: [ 28.512349] ------------[ cut here ]------------ [ 28.512622] WARNING: CPU: 2 PID: 5255 at fs/dax.c:390 dax_insert_entry

Sources

  • CVE.orgVulnerability recordCVE-2023-53306

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-53306

    30-day exploitation probability 0.14%

    first.org
  • EUVDVulnerability recordEUVD-2023-59955

    In the Linux kernel, the following vulnerability has been resolved: fsdax: force clear dirty mark if CoW XFS allows CoW on non-shared extents to combat fragmentation[1]. The old non-shared extent could be mwrited before, its dax entry is marked dirty. This results in a WARNing: [

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.