SB20260916102 - Out-of-bounds write in Linux kernel scsi megaraid driver

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds write (CVE-ID: CVE-2026-90008)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to execute arbitrary code, escalate privileges, disclose sensitive information, or cause a denial of service.

The vulnerability exists due to an out-of-bounds write in the megaraid_sas NVMe PRP-list construction routine, megasas_make_prp_nvme(), when processing oversized NVMe transfer requests. A local user can submit an oversized NVMe transfer request to overwrite memory beyond the PRP chain frame and to execute arbitrary code, escalate privileges, disclose sensitive information, or cause a denial of service.

The overflow can corrupt the PRP list of another in-flight command when the adjacent memory is mapped.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/4bb34769ef44ab3770b89e4055de6af4a458bec9
• https://git.kernel.org/stable/c/4dd118d06dec9efe5065ac7897bdc18f404a3af4
• https://git.kernel.org/stable/c/af8c27375733fb6a6df9fa484cda77cc3dd0cb80