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Back to active CVEs
Medium ยท CVSS 6.2CVE-2023-6915

Kernel: null pointer dereference vulnerability in ida_free in lib/idr.cCVE-2023-6915

Answer in brief

CVE-2023-6915 records a Medium severity (CVSS 6.2) vulnerability in Kernel: null pointer dereference vulnerability in ida_free in lib/idr.c. The current sources do not mark it as known exploited. The current feed maps Red Hat/kernel-rt (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jan 15, 2024Updated Nov 5, 2026Source checked Nov 5, 2026First seen by HOL Oct 28, 2026Material review Nov 5, 2026
Upstream Advisory

Key facts

Risk
Medium ยท CVSS 6.2
Exploitation
Not marked as known exploited
Affected software
76 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/kernel-rt (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:redhat:codeready_linux_builder:8.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder:9.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder:9.0:*:*:*:*:*:aarch64:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_arm64:8.0_aarch64:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_eus:9.4:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_eus:9.4:*:*:*:*:*:x64:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_eus:9.6:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_eus:9.6:*:*:*:*:*:x64:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_eus:9.8:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_eus:9.8:*:*:*:*:*:x64:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_ibm_z_systems:9.0_s390x:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_ibm_z_systems_eus:9.4_s390x:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_ibm_z_systems_eus:9.6_s390x:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_ibm_z_systems_eus:9.8_s390x:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_power_little_endian:8.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_power_little_endian:9.0_ppc64le:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_power_little_endian_els:8.10:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_power_little_endian_eus:9.4_ppc64le:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_power_little_endian_eus:9.6_ppc64le:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:a:redhat:codeready_linux_builder_for_power_little_endian_eus:9.8_ppc64le:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:x86:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:x86:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:9.4:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:9.6:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux:9.8:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_eus:9.4:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_eus:9.4:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_eus:9.6:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_eus:9.6:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_eus:9.8:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_eus:9.8:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_els:8.10:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_els:8.10:*:*:*:*:*:x64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_els:9.4:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_els:9.4:*:*:*:*:*:x64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_els:9.6:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_els:9.6:*:*:*:*:*:x64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_els:9.8:*:*:*:*:*:arm64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_els:9.8:*:*:*:*:*:x64:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:9.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:9.4_s390x:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:9.6_s390x:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:9.8_s390x:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_els:8.10:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_els:9.4:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_els:9.6:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_els:9.8:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:9.4_s390x:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:9.6_s390x:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:9.8_s390x:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:9.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_els:9.4:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_els:9.6:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_els:9.8:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.4_ppc64le:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.6_ppc64le:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.8:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_real_time:8.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_for_real_time_for_nfv:8.0:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_server_aus:9.4:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_server_aus:9.6:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:9.4_ppc64le:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:9.6_ppc64le:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:9.8:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_update_services_for_sap_solutions:9.4:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_update_services_for_sap_solutions:9.6:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:redhat:enterprise_linux_update_services_for_sap_solutions:9.8:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/kernel-rtgeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/kernel-rt.
  2. 2Review the reported fix. Source-reported workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Evidence timeline and material changes

  1. Published upstream

    Jan 15, 2024

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 28, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
  • GitHub security advisorygithub.com
  • Source referencelists.debian.org
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-476
Source
CVE List V5
Source checked
Nov 5, 2026
References
7 linked sources
Open source record