SB20260928344 - NULL pointer dereference in Linux kernel iommu driver
Published: September 28, 2026 Updated: September 30, 2026
Security Bulletin ID
SB20260928344
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-97593)
CWE-ID: CWE-476 - NULL Pointer Dereference
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 cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in get_rto_from_iova() when processing an unmapped IOVA using a 5-level translation table. A local user can invoke iova_to_phys() with an unmapped IOVA to cause a denial of service.
Remediation
Install update from vendor's website.