CVE-2026-97966

Summary

In the Linux kernel, the following vulnerability has been resolved:

octeontx2-pf: reset HTB scheduler topology before freeing queues

HTB offload programs NIX_AF_TLxX_TOPOLOGY on QoS-allocated scheduler queues via otx2_qos_txschq_set_parent_topology(), but teardown freed those queues without clearing TOPOLOGY. The AF only restores PARENT and SCHEDULE on free, so PRIO_ANCHOR/RR_PRIO settings can survive in the shared scheduler pool and affect later allocations.

Add otx2_qos_reset_schq_topology() and otx2_qos_free_hw_schq() to zero TL4 through TL2 TOPOLOGY before each schq is returned to the AF during hierarchy teardown and cfg rollback. Skip the aggregation level (TL1): it is a per-tx-link queue shared by the PF, default Tx hierarchy and VFs, and is not freed back to the AF by nix_txschq_free_one().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux5e6808b4c68d7882971514ab3279926eb07c8b2d < 0aa2dd6eaa347c7aab448df0eec0afcfe7489885affected
LinuxLinux5e6808b4c68d7882971514ab3279926eb07c8b2d < 621c99be42e3f5cb68a6af9480a255218a761c4eaffected
LinuxLinux5e6808b4c68d7882971514ab3279926eb07c8b2d < 2df186418e17b30b319cf9ff81aad137692ab107affected
LinuxLinux5e6808b4c68d7882971514ab3279926eb07c8b2d < ef39fca8508597fa565cf2be72a884a712fb98afaffected
LinuxLinux6.5affected
LinuxLinux0 < 6.5unaffected
LinuxLinux6.12.111 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2.7 <= 7.2.*unaffected
LinuxLinux7.3-rc3 <= *unaffected

Weaknesses

References