{"api_version":"1","generated_at":"2026-10-05T17:59:06+00:00","cve":"CVE-2026-93796","urls":{"html":"https://cve.report/CVE-2026-93796","api":"https://cve.report/api/cve/CVE-2026-93796.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93796","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93796"},"summary":{"title":"wifi: iwlwifi: pcie: null RX pointers after free","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: pcie: null RX pointers after free\n\nWhen iwl_pcie_tx_init() fails after RX init, nic init unwinds via\niwl_pcie_rx_free().\n\nThe freed RX members stayed non-NULL on the live transport object,\nso later teardown or retry could touch stale RX state.\nSet rx_pool, global_table, rxq, and alloc_page to NULL after free\nto make repeated cleanup and retry paths safe.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-24 17:17:12","updated_at":"2026-09-25 13:17:20"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/3456c5bcc987aeb182e50e30c9b02be8420e9953","name":"https://git.kernel.org/stable/c/3456c5bcc987aeb182e50e30c9b02be8420e9953","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2c79d7a7b583050c9f58041465cb46fe3483ab5d","name":"https://git.kernel.org/stable/c/2c79d7a7b583050c9f58041465cb46fe3483ab5d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6ec5bf430cf7466cb412e47f2761594092781fac","name":"https://git.kernel.org/stable/c/6ec5bf430cf7466cb412e47f2761594092781fac","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93796","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93796","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9cf671d60fdbeb8f875859c11148cf13c326ada2 6ec5bf430cf7466cb412e47f2761594092781fac git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9cf671d60fdbeb8f875859c11148cf13c326ada2 3456c5bcc987aeb182e50e30c9b02be8420e9953 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9cf671d60fdbeb8f875859c11148cf13c326ada2 2c79d7a7b583050c9f58041465cb46fe3483ab5d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.12","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.12 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 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"93796","cve":"CVE-2026-93796","epss":"0.001200000","percentile":"0.016320000","score_date":"2026-09-27","updated_at":"2026-09-28 00:02:24"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/rx.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"6ec5bf430cf7466cb412e47f2761594092781fac","status":"affected","version":"9cf671d60fdbeb8f875859c11148cf13c326ada2","versionType":"git"},{"lessThan":"3456c5bcc987aeb182e50e30c9b02be8420e9953","status":"affected","version":"9cf671d60fdbeb8f875859c11148cf13c326ada2","versionType":"git"},{"lessThan":"2c79d7a7b583050c9f58041465cb46fe3483ab5d","status":"affected","version":"9cf671d60fdbeb8f875859c11148cf13c326ada2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/rx.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.12"},{"lessThan":"5.12","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":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.111","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.53","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"5.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: pcie: null RX pointers after free\n\nWhen iwl_pcie_tx_init() fails after RX init, nic init unwinds via\niwl_pcie_rx_free().\n\nThe freed RX members stayed non-NULL on the live transport object,\nso later teardown or retry could touch stale RX state.\nSet rx_pool, global_table, rxq, and alloc_page to NULL after free\nto make repeated cleanup and retry paths safe."}],"metrics":[{"cvssV3_1":{"baseScore":7,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - The dangling pointers are created in iwl_pcie_rx_free() when iwl_pcie_nic_init() unwinds a failed iwl_pcie_tx_init() after iwl_pcie_rx_init(). That runs from iwl_trans_pcie_start_fw() during iwl_mvm_start_get_nvm()/iwl_mvm_up() (PCI firmware callback or mac80211 drv_start), not from iwl_pcie_rx_handle() or any 802.11 frame parse.\nAC:H - iwl_pcie_nic_init() only calls iwl_pcie_rx_free() when iwl_pcie_tx_init() fails after a successful iwl_pcie_rx_init(). Reachable failures are ENOMEM in iwl_pcie_tx_alloc() or a non-power-of-two slots_num in iwl_queue_init(); the attacker cannot make RX allocation succeed and the subsequent TX allocation fail on demand.\nPR:L - iwl_op_mode_mvm_start() calls iwl_mvm_start_get_nvm() → iwl_run_init_mvm_ucode() → iwl_trans_start_fw() with no capable() check from iwl_req_fw_callback after PCI bind. A local unprivileged process on a host with iwlwifi is sufficient; init-namespace CAP_NET_ADMIN is not required to reach this unwind.\nUI:N - After iwl_pcie_rx_free() in the nic_init unwind, iwl_mvm_start_get_nvm() always calls iwl_mvm_stop_device() (and iwl_run_init_ucode() always calls iwl_trans_stop_device()), so iwl_pcie_rx_napi_sync() uses the stale rxq with no victim mount, file open, or association.\nS:U - The UAF and double-free of trans_pcie->rxq, rx_pool, global_table, and alloc_page stay inside the host iwlwifi PCIe transport on the same kernel authority; this is not a KVM/Xen guest-to-host escape or an IOMMU/DMA bypass.\nC:H - iwl_pcie_rx_free() kfree()s rxq/rx_pool/global_table and __free_pages()s alloc_page without NULL, then iwl_pcie_rx_napi_sync() and _iwl_pcie_rx_init() dereference those freed objects; UAF of those slabs/pages enables arbitrary kernel read.\nI:H - _iwl_pcie_rx_init() writes the dangling rxq/rx_pool/global_table (list restock, netif_napi_add), and a later iwl_pcie_rx_free() from iwl_trans_pcie_free() double-frees the same kmalloc objects, giving a heap write/control-flow primitive.\nA:H - iwl_pcie_rx_napi_sync() walking a kfree'd rxq, or a second iwl_pcie_rx_free() of the same pointers from iwl_trans_pcie_free(), is a kernel oops or panic."}]}],"providerMetadata":{"dateUpdated":"2026-09-25T12:43:02.785Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/6ec5bf430cf7466cb412e47f2761594092781fac"},{"url":"https://git.kernel.org/stable/c/3456c5bcc987aeb182e50e30c9b02be8420e9953"},{"url":"https://git.kernel.org/stable/c/2c79d7a7b583050c9f58041465cb46fe3483ab5d"}],"title":"wifi: iwlwifi: pcie: null RX pointers after free","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-93796","datePublished":"2026-09-24T16:02:29.478Z","dateReserved":"2026-09-18T17:59:28.789Z","dateUpdated":"2026-09-25T12:43:02.785Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-24 17:17:12","lastModifiedDate":"2026-09-25 13:17:20","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93796","Ordinal":"1","Title":"wifi: iwlwifi: pcie: null RX pointers after free","CVE":"CVE-2026-93796","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93796","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: pcie: null RX pointers after free\n\nWhen iwl_pcie_tx_init() fails after RX init, nic init unwinds via\niwl_pcie_rx_free().\n\nThe freed RX members stayed non-NULL on the live transport object,\nso later teardown or retry could touch stale RX state.\nSet rx_pool, global_table, rxq, and alloc_page to NULL after free\nto make repeated cleanup and retry paths safe.","Type":"Description","Title":"wifi: iwlwifi: pcie: null RX pointers after free"}]}}}