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Vulnerabilities

Vulnerability · CVE-2023-6915

A Null pointer dereference problem was found in ida_free in lib/idr.c in the Linux Kernel.

Published Jan 15, 2024 · catalog updated Oct 23, 2026 · debian linux

Open the advisory

Exploitation likelihood is not on this record for CVE-2023-6915. A missing EPSS score is not a low risk. Compare debian linux with the linked advisory before you change production.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Medium5.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Not in the current FIRST EPSS dataset
Remediation
Advisory link
Affected products
cpe debian/debian linux · cpe redhat/codeready linux builder · cpe redhat/codeready linux builder for arm64 · cpe redhat/codeready linux builder for power little endian · cpe redhat/codeready linux builder for power little endian els · cpe redhat/enterprise linux

A Null pointer dereference problem was found in ida_free in lib/idr.c in the Linux Kernel. This issue may allow an attacker using this library to cause a denial of service problem due to a missing check at a function return.

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.

  • cpe debian/debian linux10.0
  • cpe redhat/codeready linux builder8.0
  • cpe redhat/codeready linux builder for arm648.0_aarch64
  • cpe redhat/codeready linux builder for power little endian8.0
  • cpe redhat/codeready linux builder for power little endian els8.10
  • cpe redhat/enterprise linux8.0
  • cpe redhat/enterprise linux for els8.10

How to fix CVE-2023-6915

What to do

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

Should you patch?

Exploitation likelihood is not on this record for CVE-2023-6915. A missing EPSS score is not a low risk. Compare debian linux with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with debian/debian linux 10.0; redhat/codeready linux builder 8.0; redhat/codeready linux builder for arm64 8.0_aarch64; redhat/codeready linux builder for power little endian 8.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-476: NULL Pointer Dereference. EPSS is absent from the current FIRST dataset. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

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

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 15, 2024 · NIST NVD

    Detected

    A Null pointer dereference problem was found in ida_free in lib/idr.c in the Linux Kernel. This issue may allow an attacker using this library to cause a denial of service problem due to a missing check at a function return.

  2. Oct 23, 2026 · NIST NVD

    Updated

    A Null pointer dereference problem was found in ida_free in lib/idr.c in the Linux Kernel. This issue may allow an attacker using this library to cause a denial of service problem due to a missing check at a function return.

Sources

  • CVE.orgVulnerability recordCVE-2023-6915

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2023-6915

    A Null pointer dereference problem was found in ida_free in lib/idr.c in the Linux Kernel. This issue may allow an attacker using this library to cause a denial of service problem due to a missing check at a function return.

    nvd.nist.gov

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.

CVE-2023-6915: debian linux — A Null pointer dereference problem wa… · ZeroDay Findings