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Vulnerabilities

Vulnerability · CVE-2023-53990

In the Linux kernel, the following vulnerability has been resolved: SMB3: Add missing locks to protect deferred close file list cifs_del_deferred_close function has a critical sect

Published Dec 24, 2025 · catalog updated Aug 5, 2026 · Linux Linux

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2023-53990. EPSS is 0.15%. 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
High7.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.15%
Remediation
Version ranges on file
Affected products
vendor Linux Linux ca08d0eac020d48a3141dbec0a3cf64fbdb17cde <32a046ccaeea6c19965c04a4c521e703f6607924

In the Linux kernel, the following vulnerability has been resolved: SMB3: Add missing locks to protect deferred close file list cifs_del_deferred_close function has a critical section which modifies the deferred close file list. We must acquire deferred_lock before calling cifs_del_deferred_close function.

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 ca08d0eac020d48a3141dbec0a3cf64fbdb17cde <32a046ccaeea6c19965c04a4c521e703f6607924ca08d0eac020d48a3141dbec0a3cf64fbdb17cde <32a046ccaeea6c19965c04a4c521e703f6607924

How to fix CVE-2023-53990

  • Upgrade

    CVE-2023-53990 lists a fix boundary at 32a046ccaeea6c19965c04a4c521e703f6607924. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in ca08d0eac020d48a3141dbec0a3cf64fbdb17cde <32a046ccaeea6c19965c04a4c521e703f6607924

  • 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-2023-53990. EPSS is 0.15%. Act only if a listed version of Linux Linux is installed.

Which versions are affected?

Compare what you have installed with Linux Linux ca08d0eac020d48a3141dbec0a3cf64fbdb17cde <32a046ccaeea6c19965c04a4c521e703f6607924 ca08d0eac020d48a3141dbec0a3cf64fbdb17cde <32a046ccaeea6c19965c04a4c521e703f6607924. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.15%. 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 24, 2025 · EUVD

    Detected

    In the Linux kernel, the following vulnerability has been resolved: SMB3: Add missing locks to protect deferred close file list cifs_del_deferred_close function has a critical section which modifies the deferred close file list. We must acquire deferred_lock before calling cifs_del_deferred_close function.

  2. Aug 5, 2026 · EUVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: SMB3: Add missing locks to protect deferred close file list cifs_del_deferred_close function has a critical section which modifies the deferred close file list. We must acquire deferred_lock before calling cifs_del_deferred_close function.

Sources

  • CVE.orgVulnerability recordCVE-2023-53990

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-53990

    30-day exploitation probability 0.15%

    first.org
  • EUVDVulnerability recordEUVD-2025-205177

    In the Linux kernel, the following vulnerability has been resolved: SMB3: Add missing locks to protect deferred close file list cifs_del_deferred_close function has a critical section which modifies the deferred close file list. We must acquire deferred_lock before calling cifs_d

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 1, 2026
  • CVE.orgOct 29, 2026
  • EUVDOct 29, 2026