Linux Kernel up to 6.8.1 nvme ns_update_nuse double free

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.8.1. The affected element is the function ns_update_nuse of the component nvme. The manipulation leads to double free. This vulnerability is uniquely identified as CVE-2024-27392. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.8.1 and classified as critical. This issue affects the function ns_update_nuse of the component nvme. The manipulation with an unknown input leads to a double free vulnerability. Using CWE to declare the problem leads to CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: nvme: host: fix double-free of struct nvme_id_ns in ns_update_nuse() When nvme_identify_ns() fails, it frees the pointer to the struct nvme_id_ns before it returns. However, ns_update_nuse() calls kfree() for the pointer even when nvme_identify_ns() fails. This results in KASAN double-free, which was observed with blktests nvme/045 with proposed patches [1] on the kernel v6.8-rc7. Fix the double-free by skipping kfree() when nvme_identify_ns() fails.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2024-27392 since 02/25/2024. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/07/2026).

The vulnerability scanner Nessus provides a plugin with the ID 243909 (Linux Distros Unpatched Vulnerability : CVE-2024-27392), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.8.2 or 6.9-rc1 eliminates this vulnerability. Applying the patch 534f9dc7fe49/8d0d2447394b is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (243909) and CERT Bund (WID-SEC-2024-1008). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• Oracle VM
• EMC Avamar
• IBM QRadar SIEM
• Dell NetWorker
• IBM Security Guardium
• RESF Rocky Linux
• Broadcom Brocade SANnav
• Open Source Linux Kernel
• IBM Business Automation Workflow
• IBM Spectrum Protect Plus
• Dell Avamar
• Juniper Junos Space
• IBM DataPower Gateway
• IBM Storage Scale System
• SolarWinds Security Event Manager
• Dell PowerProtect Data Domain
• Dell PowerScale OneFS

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.8.0
• 6.8.1

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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