A flaw was found in the Linux kernel, specifically within the `iommu/amd` component responsible for managing memory access. This vulnerability arises from an issue in how commands are processed during concurrent memory invalidations, causing them to be queued out of sequence. This can lead to system instability and timeouts, potentially allowing an attacker to trigger a Denial of Service (DoS) condition, rendering the system unavailable.

Red Hat Enterprise Linux 10 Not affected kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Not affected kernel Red Hat Enterprise Linux 8 Not affected kernel-rt Red Hat Enterprise Linux 9 Not affected kernel Red Hat Enterprise Linux 9 Not affected kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-43220 https://nvd.nist.gov/vuln/detail/CVE-2026-43220 https://lore.kernel.org/linux-cve-announce/2026050652-CVE-2026-43220-cf2b@gregkh/T