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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-97966

octeontx2-pf: reset HTB scheduler topology before freeing queues

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 5e6808b4c68d7882971514ab3279926eb07c8b2d to < 16c5c8ea5017952ff14c87626a45359d195dda6faffected
  • 5e6808b4c68d7882971514ab3279926eb07c8b2d to < 0aa2dd6eaa347c7aab448df0eec0afcfe7489885affected
  • 5e6808b4c68d7882971514ab3279926eb07c8b2d to < 621c99be42e3f5cb68a6af9480a255218a761c4eaffected
  • 5e6808b4c68d7882971514ab3279926eb07c8b2d to < 2df186418e17b30b319cf9ff81aad137692ab107affected
  • 5e6808b4c68d7882971514ab3279926eb07c8b2d to < ef39fca8508597fa565cf2be72a884a712fb98afaffected

Linux Linux

Default version status: affected

  • 6.5affected
  • 0 to < 6.5unaffected
  • 6.6.158 to ≤ 6.6.*unaffected
  • 6.12.111 to ≤ 6.12.*unaffected
  • 6.18.53 to ≤ 6.18.*unaffected
  • 7.2.7 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References