Out-of-bounds write in Linux kernel - CVE-2026-90008

Vulnerability details

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.

Affected software

How to mitigate CVE-2026-90008

External References

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

Related Security Bulletins

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