In the Linux kernel, the following vulnerability has been resolved: net/sched: mqprio: fix stack out-of-bounds write in tc entry parsing TCA_MQPRIO_TC_ENTRY_INDEX is validated using NLA_POLICY_MAX(NLA_U32, TC_QOPT_MAX_QUEUE), which allows the value TC_QOPT_MAX_QUEUE (16). This leads to a 4-byte out-of-bounds stack write in the fp[] array, which only has room for 16 elements (0–15). Fix this by changing the policy to allow only up to TC_QOPT_MAX_QUEUE - 1.
Upstream advisory: https://lore.kernel.org/linux-cve-announce/2025081909-CVE-2025-38568-7cd9@gregkh/T
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:1617 https://access.redhat.com/errata/RHSA-2026:1617
This issue has been addressed in the following products: Red Hat Enterprise Linux 10 Via RHSA-2026:1690 https://access.redhat.com/errata/RHSA-2026:1690
This issue has been addressed in the following products: Red Hat Enterprise Linux 10.0 Extended Update Support Via RHSA-2026:1727 https://access.redhat.com/errata/RHSA-2026:1727
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.6 Extended Update Support Via RHSA-2026:2352 https://access.redhat.com/errata/RHSA-2026:2352
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.4 Extended Update Support Via RHSA-2026:2594 https://access.redhat.com/errata/RHSA-2026:2594