SB20261022330 - Out-of-bounds read in Linux kernel nvme target driver

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-98724)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to trigger an out-of-bounds kernel memory read that may cause a denial of service.

The vulnerability exists due to an out-of-bounds read in nvmet_pci_epf_get_sgl_segment() when processing a host-controlled SGL segment with a nonzero length smaller than one descriptor. A local user can supply such a segment to make the descriptor count zero and trigger a read of the type byte of sgls[-1] before the allocated buffer, potentially causing a kernel panic.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2423a05dd0f21330c47ce0ae1cb54a8b0be821e2
• https://git.kernel.org/stable/c/472df1d103dbe3e9d09156f0667e36180e912c46
• https://git.kernel.org/stable/c/5d5fbfbbacd1efb13a9bf91317d4fde859ede4b9