What’s Vulnerable › Vulnerabilities
CVE-2023-6915: Kernel: null pointer dereference vulnerability in ida_free in lib/idr.c
- Severity: medium (CVSS 5.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2024-01-15 · updated 2026-10-23
- Weakness: CWE-476
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.
Affected products
- Debian Linux: 10.0
- Linux kernel: before 6.6.13 — fixed in 6.6.13
- RedHat Codeready Linux Builder: 8.0, 9.0
- RedHat Codeready Linux Builder For Arm64: 8.0_aarch64
- RedHat Codeready Linux Builder For Eus: 9.4, 9.6, 9.8
- RedHat Codeready Linux Builder For Ibm Z Systems: 9.0_s390x
- RedHat Codeready Linux Builder For Ibm Z Systems Eus: 9.4_s390x, 9.6_s390x, 9.8_s390x
- RedHat Codeready Linux Builder For Power Little Endian: 8.0, 9.0_ppc64le
- RedHat Codeready Linux Builder For Power Little Endian Els: 8.10
- RedHat Codeready Linux Builder For Power Little Endian Eus: 9.4_ppc64le, 9.6_ppc64le, 9.8_ppc64le
- Red Hat Enterprise Linux: 8.0, 9.0, 9.4, 9.6, 9.8
- RedHat Enterprise Linux Eus: 9.4, 9.6, 9.8
- RedHat Enterprise Linux For Els: 8.10, 9.4, 9.6, 9.8
- RedHat Enterprise Linux For Ibm Z Systems: 8.0, 9.0, 9.4_s390x, 9.6_s390x, 9.8_s390x
- RedHat Enterprise Linux For Ibm Z Systems Els: 8.10, 9.4, 9.6, 9.8
- RedHat Enterprise Linux For Ibm Z Systems Eus: 9.4_s390x, 9.6_s390x, 9.8_s390x
- RedHat Enterprise Linux For Power Little Endian: 8.0, 9.0
- RedHat Enterprise Linux For Power Little Endian Els: 9.4, 9.6, 9.8
- RedHat Enterprise Linux For Power Little Endian Eus: 9.4_ppc64le, 9.6_ppc64le, 9.8
- RedHat Enterprise Linux For Real Time: 8.0
- RedHat Enterprise Linux For Real Time For Nfv: 8.0
- RedHat Enterprise Linux Server Aus: 9.4, 9.6
- RedHat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions: 9.4_ppc64le, 9.6_ppc64le, 9.8
- RedHat Enterprise Linux Update Services For Sap Solutions: 9.4, 9.6, 9.8
How to fix
Upgrade to a fixed version: Linux kernel 6.6.13. Check the vendor advisory for mitigations.
References
- https://access.redhat.com/errata/RHSA-2024:2394
- https://access.redhat.com/errata/RHSA-2024:2950
- https://access.redhat.com/errata/RHSA-2024:3138
- https://access.redhat.com/security/cve/CVE-2023-6915
- https://bugzilla.redhat.com/show_bug.cgi?id=2254982
- https://github.com/torvalds/linux/commit/af73483f4e8b6f5c68c9aa63257bdd929a9c194a
- https://access.redhat.com/errata/RHSA-2024:2394
- https://access.redhat.com/errata/RHSA-2024:2950
- https://access.redhat.com/errata/RHSA-2024:3138
- https://access.redhat.com/security/cve/CVE-2023-6915
- https://bugzilla.redhat.com/show_bug.cgi?id=2254982
- https://github.com/torvalds/linux/commit/af73483f4e8b6f5c68c9aa63257bdd929a9c194a
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