CVE-2022-50816

A flaw was found in the Linux kernel’s IPv6 networking code affecting the handling of IPv6 GRE tunnels. Under certain conditions, an IPv6 tunnel configuration could result in an invalid MTU (Maximum Transmission Unit) value being written to a network device without sanitization. Because the MTU value was not validated before being published to device state, concurrent or lockless readers in the IPv6 multicast code path could observe malformed MTU values, potentially leading to a kernel BUG or panic and resulting in loss of network connectivity or system instability. A local user with privileges to create or configure IPv6 GRE tunnels may trigger this condition

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.

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.