octeontx2-pf: reset HTB scheduler topology before freeing queues (CVE-2026-97966) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-97966

octeontx2-pf: reset HTB scheduler topology before freeing queues

Answer in brief

CVE-2026-97966 records a Unknown severity vulnerability in octeontx2-pf: reset HTB scheduler topology before freeing queues. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=5e6808b4c68d7882971514ab3279926eb07c8b2d <0aa2dd6eaa347c7aab448df0eec0afcfe7489885 \|\| >=5e6808b4c68d7882971514ab3279926eb07c8b2d <621c99be42e3f5cb68a6af9480a255218a761c4e \|\| >=5e6808b4c68d7882971514ab3279926eb07c8b2d <2df186418e17b30b319cf9ff81aad137692ab107 \|\| >=5e6808b4c68d7882971514ab3279926eb07c8b2d <ef39fca8508597fa565cf2be72a884a712fb98af	0aa2dd6eaa347c7aab448df0eec0afcfe7489885, 621c99be42e3f5cb68a6af9480a255218a761c4e, 2df186418e17b30b319cf9ff81aad137692ab107, ef39fca8508597fa565cf2be72a884a712fb98af
Linux/Linuxgeneric	6.5	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 0aa2dd6eaa347c7aab448df0eec0afcfe7489885 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source 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().

Quoted source text, attributed separately from HOL analysis.