{"api_version":"1","generated_at":"2026-09-25T12:40:15+00:00","cve":"CVE-2026-97966","urls":{"html":"https://cve.report/CVE-2026-97966","api":"https://cve.report/api/cve/CVE-2026-97966.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-97966","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-97966"},"summary":{"title":"octeontx2-pf: reset HTB scheduler topology before freeing queues","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-pf: reset HTB scheduler topology before freeing queues\n\nHTB offload programs NIX_AF_TLxX_TOPOLOGY on QoS-allocated scheduler\nqueues via otx2_qos_txschq_set_parent_topology(), but teardown freed\nthose queues without clearing TOPOLOGY.  The AF only restores PARENT and\nSCHEDULE on free, so PRIO_ANCHOR/RR_PRIO settings can survive in the\nshared scheduler pool and affect later allocations.\n\nAdd otx2_qos_reset_schq_topology() and otx2_qos_free_hw_schq() to zero\nTL4 through TL2 TOPOLOGY before each schq is returned to the AF during\nhierarchy teardown and cfg rollback.  Skip the aggregation level (TL1):\nit is a per-tx-link queue shared by the PF, default Tx hierarchy and VFs,\nand is not freed back to the AF by nix_txschq_free_one().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-25 11:17:24","updated_at":"2026-09-25 11:17:24"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/ef39fca8508597fa565cf2be72a884a712fb98af","name":"https://git.kernel.org/stable/c/ef39fca8508597fa565cf2be72a884a712fb98af","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2df186418e17b30b319cf9ff81aad137692ab107","name":"https://git.kernel.org/stable/c/2df186418e17b30b319cf9ff81aad137692ab107","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/621c99be42e3f5cb68a6af9480a255218a761c4e","name":"https://git.kernel.org/stable/c/621c99be42e3f5cb68a6af9480a255218a761c4e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0aa2dd6eaa347c7aab448df0eec0afcfe7489885","name":"https://git.kernel.org/stable/c/0aa2dd6eaa347c7aab448df0eec0afcfe7489885","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97966","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97966","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5e6808b4c68d7882971514ab3279926eb07c8b2d 0aa2dd6eaa347c7aab448df0eec0afcfe7489885 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5e6808b4c68d7882971514ab3279926eb07c8b2d 621c99be42e3f5cb68a6af9480a255218a761c4e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5e6808b4c68d7882971514ab3279926eb07c8b2d 2df186418e17b30b319cf9ff81aad137692ab107 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5e6808b4c68d7882971514ab3279926eb07c8b2d ef39fca8508597fa565cf2be72a884a712fb98af git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.5","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.111 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.53 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.7 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/ethernet/marvell/octeontx2/nic/qos.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0aa2dd6eaa347c7aab448df0eec0afcfe7489885","status":"affected","version":"5e6808b4c68d7882971514ab3279926eb07c8b2d","versionType":"git"},{"lessThan":"621c99be42e3f5cb68a6af9480a255218a761c4e","status":"affected","version":"5e6808b4c68d7882971514ab3279926eb07c8b2d","versionType":"git"},{"lessThan":"2df186418e17b30b319cf9ff81aad137692ab107","status":"affected","version":"5e6808b4c68d7882971514ab3279926eb07c8b2d","versionType":"git"},{"lessThan":"ef39fca8508597fa565cf2be72a884a712fb98af","status":"affected","version":"5e6808b4c68d7882971514ab3279926eb07c8b2d","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ethernet/marvell/octeontx2/nic/qos.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.5"},{"lessThan":"6.5","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.111","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.53","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.111","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.53","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.7","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc3","versionStartIncluding":"6.5","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-pf: reset HTB scheduler topology before freeing queues\n\nHTB offload programs NIX_AF_TLxX_TOPOLOGY on QoS-allocated scheduler\nqueues via otx2_qos_txschq_set_parent_topology(), but teardown freed\nthose queues without clearing TOPOLOGY.  The AF only restores PARENT and\nSCHEDULE on free, so PRIO_ANCHOR/RR_PRIO settings can survive in the\nshared scheduler pool and affect later allocations.\n\nAdd otx2_qos_reset_schq_topology() and otx2_qos_free_hw_schq() to zero\nTL4 through TL2 TOPOLOGY before each schq is returned to the AF during\nhierarchy teardown and cfg rollback.  Skip the aggregation level (TL1):\nit is a per-tx-link queue shared by the PF, default Tx hierarchy and VFs,\nand is not freed back to the AF by nix_txschq_free_one()."}],"providerMetadata":{"dateUpdated":"2026-09-25T10:23:08.543Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/0aa2dd6eaa347c7aab448df0eec0afcfe7489885"},{"url":"https://git.kernel.org/stable/c/621c99be42e3f5cb68a6af9480a255218a761c4e"},{"url":"https://git.kernel.org/stable/c/2df186418e17b30b319cf9ff81aad137692ab107"},{"url":"https://git.kernel.org/stable/c/ef39fca8508597fa565cf2be72a884a712fb98af"}],"title":"octeontx2-pf: reset HTB scheduler topology before freeing queues","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-97966","datePublished":"2026-09-25T10:23:08.543Z","dateReserved":"2026-09-25T10:18:58.206Z","dateUpdated":"2026-09-25T10:23:08.543Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-25 11:17:24","lastModifiedDate":"2026-09-25 11:17:24","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"97966","Ordinal":"1","Title":"octeontx2-pf: reset HTB scheduler topology before freeing queues","CVE":"CVE-2026-97966","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"97966","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-pf: reset HTB scheduler topology before freeing queues\n\nHTB offload programs NIX_AF_TLxX_TOPOLOGY on QoS-allocated scheduler\nqueues via otx2_qos_txschq_set_parent_topology(), but teardown freed\nthose queues without clearing TOPOLOGY.  The AF only restores PARENT and\nSCHEDULE on free, so PRIO_ANCHOR/RR_PRIO settings can survive in the\nshared scheduler pool and affect later allocations.\n\nAdd otx2_qos_reset_schq_topology() and otx2_qos_free_hw_schq() to zero\nTL4 through TL2 TOPOLOGY before each schq is returned to the AF during\nhierarchy teardown and cfg rollback.  Skip the aggregation level (TL1):\nit is a per-tx-link queue shared by the PF, default Tx hierarchy and VFs,\nand is not freed back to the AF by nix_txschq_free_one().","Type":"Description","Title":"octeontx2-pf: reset HTB scheduler topology before freeing queues"}]}}}