SB20261023209 - Access of Uninitialized Pointer in Linux kernel nvme target driver

Description

This security bulletin contains information about 1 vulnerability.

1) Access of Uninitialized Pointer (CVE-ID: CVE-2026-98964)

CWE-ID: CWE-824 - Access of Uninitialized Pointer

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to potentially cause a denial of service through invalid pointer access in the Linux kernel.

The vulnerability exists due to use of a device pointer before initialization in nvmet_req_alloc_p2pmem_sgls() when the data scatter-gather list allocation succeeds but the metadata allocation fails. A local user can trigger request processing that reaches this failure path to potentially cause a kernel crash, as cleanup passes req->p2p_dev to pci_p2pmem_free_sgl() before the device pointer has been assigned.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/32f21607911a1f69c8f0f93a6c28fe6f8490aa98
• https://git.kernel.org/stable/c/3c231142c4f4bb96836469eb276026ec55940093
• https://git.kernel.org/stable/c/4aa9c0f377a4de5e8fddce76b34ee4529639a1ff
• https://git.kernel.org/stable/c/73bf0f9579633b531098a475e6e55c9316763aed
• https://git.kernel.org/stable/c/ce79a6c5cc1b8054ec8d3eba16adda4a36113438