CVE-2025-21906

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No routable-network path exists, so this is Adjacent rather than Network.\nAC:L - The attacker can drive ROC attempts repeatedly and indefinitely at no cost, and each attempt that the firmware fails to start leaks a station ID and leaves the link active; there is no memory layout to guess, no race to win, and no lockout, so success is only a matter of retrying.\nPR:N - An adjacent P2P peer needs no credentials on the target \u2014 P2P discovery, provision discovery and GO negotiation are entirely pre-association, and the target's supplicant responds automatically by requesting off-channel ROC on the P2P_DEVICE interface.\nUI:N - On devices where Wi-Fi Direct/P2P is active (Android phones, Miracast/Chromecast-capable systems, wpa_supplicant with P2P enabled), the P2P device sits in listen/find state and answers peer frames automatically, so no victim action is required at exploitation time.\nS:U - The corrupted state, the WARN, and the leaked station/queue resources are all confined to the kernel's own iwlwifi driver state within the same host; no VM, IOMMU, or sandbox boundary is crossed.\nC:L - The resulting `WARN_ON_ONCE()` in `iwl_mvm_link_changed()` dumps a full backtrace with kernel text/module addresses and register contents into the ring buffer, exposing KASLR-relevant pointers on the common `dmesg_restrict=0` configurations; the leak is bounded to that log record with no out-of-bounds or arbitrary read.\nI:L - The skipped cleanup leaves stale kernel/firmware state \u2014 the link remains active, a firmware station entry and the p2p_dev queue are orphaned and overwritten on the next ROC, and unflushed off-channel frames are documented to be transmitted during a later, unrelated time event (i.e. on the wrong channel/context). The modification is limited to driver/device state, not arbitrary kernel memory.\nA:H - The bug reliably produces a kernel `WARN_ON_ONCE`, which panics immediately on the many production, cloud, hardened, Android and CI configurations that set `panic_on_warn=1`; even without that, repeated triggering leaks firmware station IDs until `iwl_mvm_find_free_sta_id()` returns `IWL_INVALID_STA`, breaking remain-on-channel, P2P and association until the interface or firmware is reset."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/intel/iwlwifi/mvm/time-event.c"], "versions": [{"version": "35c1bbd93c4e6969b3ac238b48a8bdff3e223ed8", "lessThan": "a88c18409b5d69f426d5acc583c053eac71756a3", "status": "affected", "versionType": "git"}, {"version": "35c1bbd93c4e6969b3ac238b48a8bdff3e223ed8", "lessThan": "d1a12fcb9051bbf38b2e5af310ffb102a0fab6f9", "status": "affected", "versionType": "git"}, {"version": "35c1bbd93c4e6969b3ac238b48a8bdff3e223ed8", "lessThan": "f9751163bffd3fe60794929829f810968c6de73d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/intel/iwlwifi/mvm/time-event.c"], "versions": [{"version": "6.9", "status": "affected"}, {"version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.19", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13.7", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.14", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.12.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.13.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.14"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a88c18409b5d69f426d5acc583c053eac71756a3"}, {"url": "https://git.kernel.org/stable/c/d1a12fcb9051bbf38b2e5af310ffb102a0fab6f9"}, {"url": "https://git.kernel.org/stable/c/f9751163bffd3fe60794929829f810968c6de73d"}], "title": "wifi: iwlwifi: mvm: clean up ROC on failure", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-21906", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-15T21:43:41.307072Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:51:55.394Z"}}]}}

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No routable-network path exists, so this is Adjacent rather than Network.\nAC:L - The attacker can drive ROC attempts repeatedly and indefinitely at no cost, and each attempt that the firmware fails to start leaks a station ID and leaves the link active; there is no memory layout to guess, no race to win, and no lockout, so success is only a matter of retrying.\nPR:N - An adjacent P2P peer needs no credentials on the target \u2014 P2P discovery, provision discovery and GO negotiation are entirely pre-association, and the target's supplicant responds automatically by requesting off-channel ROC on the P2P_DEVICE interface.\nUI:N - On devices where Wi-Fi Direct/P2P is active (Android phones, Miracast/Chromecast-capable systems, wpa_supplicant with P2P enabled), the P2P device sits in listen/find state and answers peer frames automatically, so no victim action is required at exploitation time.\nS:U - The corrupted state, the WARN, and the leaked station/queue resources are all confined to the kernel's own iwlwifi driver state within the same host; no VM, IOMMU, or sandbox boundary is crossed.\nC:L - The resulting `WARN_ON_ONCE()` in `iwl_mvm_link_changed()` dumps a full backtrace with kernel text/module addresses and register contents into the ring buffer, exposing KASLR-relevant pointers on the common `dmesg_restrict=0` configurations; the leak is bounded to that log record with no out-of-bounds or arbitrary read.\nI:L - The skipped cleanup leaves stale kernel/firmware state \u2014 the link remains active, a firmware station entry and the p2p_dev queue are orphaned and overwritten on the next ROC, and unflushed off-channel frames are documented to be transmitted during a later, unrelated time event (i.e. on the wrong channel/context). 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Establezca IWL_MVM_STATUS_ROC_P2P_RUNNING en la ruta de error/detenci\u00f3n. Si se inici\u00f3 correctamente antes, ya est\u00e1 configurado, por lo que no importa, y si no se inici\u00f3, debe configurarse para limpiar. No hacerlo conducir\u00e1 a un WARN_ON() m\u00e1s tarde en un nuevo canal restante, ya que el enlace ya est\u00e1 activo cuando se activ\u00f3, ya que nunca se desactiv\u00f3."}], "id": "CVE-2025-21906", "lastModified": "2026-10-15T22:18:11.770", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.6, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.7, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-21906", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-15T21:43:41.307072Z", "version": "2.0.3"}}]}, "published": "2025-04-01T16:15:21.110", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a88c18409b5d69f426d5acc583c053eac71756a3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d1a12fcb9051bbf38b2e5af310ffb102a0fab6f9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f9751163bffd3fe60794929829f810968c6de73d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-665"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: wifi: iwlwifi: mvm: clean up ROC on failure", "id": "2356648", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2356648"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-665", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nwifi: iwlwifi: mvm: clean up ROC on failure\nIf the firmware fails to start the session protection, then we\ndo call iwl_mvm_roc_finished() here, but that won't do anything\nat all because IWL_MVM_STATUS_ROC_P2P_RUNNING was never set.\nSet IWL_MVM_STATUS_ROC_P2P_RUNNING in the failure/stop path.\nIf it started successfully before, it's already set, so that\ndoesn't matter, and if it didn't start it needs to be set to\nclean up.\nNot doing so will lead to a WARN_ON() later on a fresh remain-\non-channel, since the link is already active when activated as\nit was never deactivated."], "name": "CVE-2025-21906", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-04-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-21906\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-21906\nhttps://lore.kernel.org/linux-cve-announce/2025040129-CVE-2025-21906-de63@gregkh/T"], "threat_severity": "Low"}

{}