CVE-2026-97966octeontx2-pf: reset HTB scheduler topology before freeing queues
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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().
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 5e6808b4c68d7882971514ab3279926eb07c8b2d before 16c5c8ea5017952ff14c87626a45359d195dda6f; 5e6808b4c68d7882971514ab3279926eb07c8b2d builds before 0aa2dd6eaa347c7aab448df0eec0afcfe7489885; from 5e6808b4c68d7882971514ab3279926eb07c8b2d before 621c99be42e3f5cb68a6af9480a255218a761c4e; 5e6808b4c68d7882971514ab3279926eb07c8b2d builds before 2df186418e17b30b319cf9ff81aad137692ab107; from 5e6808b4c68d7882971514ab3279926eb07c8b2d before ef39fca8508597fa565cf2be72a884a712fb98af | CNA record |
References
- https://git.kernel.org/stable/c/16c5c8ea5017952ff14c87626a45359d195dda6f
- https://git.kernel.org/stable/c/0aa2dd6eaa347c7aab448df0eec0afcfe7489885
- https://git.kernel.org/stable/c/621c99be42e3f5cb68a6af9480a255218a761c4e
- https://git.kernel.org/stable/c/2df186418e17b30b319cf9ff81aad137692ab107
- https://git.kernel.org/stable/c/ef39fca8508597fa565cf2be72a884a712fb98af
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.