CVE-2026-43208

A flaw was found in the Linux kernel's networking component. An incorrect assumption about the size and immutability of the Receive Packet Steering (RPS) table could lead to an out-of-bounds memory access. This vulnerability, occurring during the computation of flow_id in the set_rps_cpu() function, could result in system crashes or other unpredictable behavior, potentially leading to a Denial of Service (DoS).

A stale RPS/RFS flow_id computed for one receive-queue flow table could be reused against another table in set_rps_cpu(), causing out-of-bounds access in the network receive path. Practical impact appears to be primarily remote-triggerable DoS under specific RPS/RFS conditions, with no demonstrated privilege-escalation primitive. The Red Hat Enterprise Linux not affected, because the bug not introduced yet (means that Fixes patch not applied yet, so not actual where the Fixes patch ID is 48aa30443e52c9666d5cd5e67532e475f212337e).

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.