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CVE-2026-97966— octeontx2-pf: reset HTB scheduler topology before freeing queues

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： octeontx2-pf：在释放队列之前重置 HTB 调度器拓扑 HTB（Hierarchical Token Bucket）卸载功能通过 函数，将 NIX_AF_TLxX_TOPOLOGY 配置应用于 QoS 分配给调度器的队列。然而，在系统拆除（teardown）过程中，这些队列被释放时并未清除 TOPOLOGY 设置。由于地址字段（AF）仅在队列释放时恢复 PARENT（父节点）和 SCHEDULE（调度策略）字段，因此 PRIO_ANCHOR（优先级锚点）和 R

AI Predicted 4.3 Difficulty: Hard EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1562.001

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 5e6808b4c68d7882971514ab3279926eb07c8b2d< 16c5c8ea5017952ff14c87626a45359d195dda6f affected
5e6808b4c68d7882971514ab3279926eb07c8b2d< 0aa2dd6eaa347c7aab448df0eec0afcfe7489885 affected
5e6808b4c68d7882971514ab3279926eb07c8b2d< 621c99be42e3f5cb68a6af9480a255218a761c4e affected
5e6808b4c68d7882971514ab3279926eb07c8b2d< 2df186418e17b30b319cf9ff81aad137692ab107 affected
5e6808b4c68d7882971514ab3279926eb07c8b2d< ef39fca8508597fa565cf2be72a884a712fb98af affected
6.5 affected
< 6.5 unaffected
6.6.158≤ 6.6.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-97966

Vulnerability Information
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Vulnerability Title
octeontx2-pf: reset HTB scheduler topology before freeing queues
Source: CVE Program / CVE List V5
Vulnerability 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().
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 5e6808b4c68d7882971514ab3279926eb07c8b2d ~ 16c5c8ea5017952ff14c87626a45359d195dda6f -
Linux Linux 6.5 -

II. Public POCs for CVE-2026-97966

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III. Intelligence Information for CVE-2026-97966

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Patches & Fixes for CVE-2026-97966 (5)

Same Patch Batch · Linux · 2026-09-25 · 372 CVEs total

CVE-2026-100075 9.8 CRITICAL RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters
CVE-2026-97555 8.8 HIGH smb: client: fix heap overflow in DACL owner/group rewrite
CVE-2026-97957 8.8 HIGH net: hinic: fix mailbox segment buffer overflow
CVE-2026-97527 8.8 HIGH scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock
CVE-2026-97528 8.8 HIGH scsi: qla2xxx: Unlink NVMe unsol ctx before freeing on LS reject error
CVE-2026-98115 8.8 HIGH ksmbd: safely drain sessions during logoff
CVE-2026-97525 8.2 HIGH x86/mm/pat: Allocate split page tables as kernel page tables
CVE-2026-98069 8.1 HIGH net/rds: acquire the fastpath locks in rds_conn_shutdown()
CVE-2026-97573 8.1 HIGH bnxt_en: Handle buffer allocation failure in bnxt_rx_ring_reset()
CVE-2026-97570 8.1 HIGH bnxt_en: Bound SW TPA IDs to prevent crashes
CVE-2026-98130 8.1 HIGH sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START
CVE-2026-98070 8.1 HIGH net/rds: acquire RDS_IN_XMIT in rds_tcp_reset_callbacks()
CVE-2026-97941 7.8 HIGH mm/slab: take n->list_lock in __slab_try_return_freelist() to avoid race
CVE-2026-97575 7.8 HIGH media: v4l2-ctrls: validate AV1 tile counts
CVE-2026-97576 7.8 HIGH media: v4l2-ctrls: validate HEVC tile counts
CVE-2026-98002 7.8 HIGH iommu/amd: Fix ineffective error check in nested domain allocation
CVE-2026-98112 7.8 HIGH ksmbd: fix listener task lifetime on netdev events
CVE-2026-97937 7.8 HIGH ftrace: fork: Initialize function graph state before copy_exec_state()
CVE-2026-97580 7.8 HIGH media: rkvdec: bound HEVC tile loops and PPS id to the array capacity
CVE-2026-97940 7.8 HIGH ipv6: fix fib6 walker UAF on seq stop

Showing top 20 of 372 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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