CVE-2026-43083

A flaw was found in the Linux kernel's ioam6 network module. A remote attacker could potentially trigger an out-of-bounds access in the skb_get_tx_queue function by sending specially crafted network packets. This occurs when an ingress device has more receive queues than the egress device has transmit queues, which can lead to a system crash, resulting in a Denial of Service (DoS). Furthermore, a missing lock around the qdisc_qstats_qlen_backlog function introduces a race condition, potentially causing data corruption or system instability.

Red Hat acknowledges the upstream Linux kernel correction for «net» as described in COMMENT_ZERO. Fixes are delivered through standard kernel errata for supported products. Operational exposure depends on whether this subsystem or driver is active in your configuration.

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.