SB2026062981 - Improper Check for Unusual or Exceptional Conditions in Linux kernel iommu amd driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2026-53282)

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

CVSSv4: 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/E:U/U:Clear

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper handling of a missing return address in x86 kexec purgatory code when processing a non-kjump kexec. A local user can trigger a non-kjump kexec to cause a denial of service.

The issue can cause purgatory to crash by attempting to access a return address above the top of its stack.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/786a45757dcdf8f2beb9d4a6db605db16c18b2b4
• https://git.kernel.org/stable/c/7dba9631faa2ee0785e8c2bf0e3d90a05f26dd8c
• https://git.kernel.org/stable/c/b0bd7a850e1f082560959707dbf57b0402071646