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Vulnerabilities

Vulnerability · CVE-2023-53266

In the Linux kernel, the following vulnerability has been resolved: arm64: acpi: Fix possible memory leak of ffh_ctxt Allocated 'ffh_ctxt' memory leak is possible if the SMCCC vers

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

Check this week

CVE-2023-53266 is not in CISA KEV. FIRST estimates a 14.00% chance of exploitation in the next 30 days. Check whether you run Linux Linux.

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
14.00%
Remediation
Version ranges on file
Affected products
vendor Linux Linux 1d280ce099db396e092cac1aa9bf2ea8beee6d76 <1b561d3949f8478c5403c9752b5533211a757226

In the Linux kernel, the following vulnerability has been resolved: arm64: acpi: Fix possible memory leak of ffh_ctxt Allocated 'ffh_ctxt' memory leak is possible if the SMCCC version and conduit checks fail and -EOPNOTSUPP is returned without freeing the allocated memory. Fix the same by moving the allocation after the SMCCC version and conduit checks.

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 1d280ce099db396e092cac1aa9bf2ea8beee6d76 <1b561d3949f8478c5403c9752b5533211a7572261d280ce099db396e092cac1aa9bf2ea8beee6d76 <1b561d3949f8478c5403c9752b5533211a757226

How to fix CVE-2023-53266

What to do

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

Should you patch?

CVE-2023-53266 is not in CISA KEV. FIRST estimates a 14.00% chance of exploitation in the next 30 days. Check whether you run Linux Linux.

Which versions are affected?

Compare what you have installed with Linux Linux 1d280ce099db396e092cac1aa9bf2ea8beee6d76 <1b561d3949f8478c5403c9752b5533211a757226 1d280ce099db396e092cac1aa9bf2ea8beee6d76 <1b561d3949f8478c5403c9752b5533211a757226. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 14.00%. 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: arm64: acpi: Fix possible memory leak of ffh_ctxt Allocated 'ffh_ctxt' memory leak is possible if the SMCCC version and conduit checks fail and -EOPNOTSUPP is returned without freeing the allocated memory. Fix the same by moving the allocation after the SMCCC version and conduit checks.

  2. May 11, 2026 · EUVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: arm64: acpi: Fix possible memory leak of ffh_ctxt Allocated 'ffh_ctxt' memory leak is possible if the SMCCC version and conduit checks fail and -EOPNOTSUPP is returned without freeing the allocated memory. Fix the same by moving the allocation after the SMCCC version and conduit checks.

Sources

  • CVE.orgVulnerability recordCVE-2023-53266

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2023-59923

    In the Linux kernel, the following vulnerability has been resolved: arm64: acpi: Fix possible memory leak of ffh_ctxt Allocated 'ffh_ctxt' memory leak is possible if the SMCCC version and conduit checks fail and -EOPNOTSUPP is returned without freeing the allocated memory. Fix th

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog May 11, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.