CVE-2026-64325

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7921/main.c", "drivers/net/wireless/mediatek/mt76/mt7925/main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "d16713c06006669c7162dfab1cedf4cb24429311", "status": "affected", "version": "8aa2f59260eb66fc80378c158922ccb741ccc491", "versionType": "git"}, {"lessThan": "77e7b127472a191e086e1e0b1b051703f33b1801", "status": "affected", "version": "8aa2f59260eb66fc80378c158922ccb741ccc491", "versionType": "git"}, {"lessThan": "351dd7d2c80d23e56dcce6faa4e62bea5b0877c7", "status": "affected", "version": "8aa2f59260eb66fc80378c158922ccb741ccc491", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/wireless/mediatek/mt76/mt7921/main.c", "drivers/net/wireless/mediatek/mt76/mt7925/main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.14"}, {"lessThan": "6.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0F4C880B-B726-4B42-A1A7-46F8F70A7D2E", "versionEndExcluding": "7.1.4", "versionStartIncluding": "6.14", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7921/mt7925: fix NULL dereference in CSA beacon\n\nThis patch is based on a BUG as reported by Bongani Hlope at\nhttps://lore.kernel.org/all/20260502125824.425d7159@bongani-mini.home.org.za/\n\nWhen a channel-switch announcement (CSA) beacon is received,\ncfg80211 queues a wiphy work item that eventually calls\nmt7921_channel_switch_rx_beacon(). If the station disconnects\n(or the channel context is otherwise torn down) between the\ntime the work is queued and the time it runs, the driver's\ndev->new_ctx pointer can already have been cleared to NULL.\nmt7921_channel_switch_rx_beacon() then dereferences new_ctx\nunconditionally, triggering a NULL pointer dereference at\naddress 0x0:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n RIP: 0010:mt7921_channel_switch_rx_beacon+0x1f/0x100 [mt7921_common]\n\nThe same missing guard exists in mt7925_channel_switch_rx_beacon(),\nwhich shares the same code pattern introduced by the same commit.\n\nAdd an early-return NULL check for dev->new_ctx in both\nmt7921_channel_switch_rx_beacon() and\nmt7925_channel_switch_rx_beacon(). When new_ctx is NULL there is\nno pending channel switch to process, so returning immediately is\nthe correct and safe action.\n\nOops-Analysis: http://oops.fenrus.org/reports/lkml/20260502125824.425d7159@bongani-mini.home.org.za/report.html"}], "id": "CVE-2026-64325", "lastModified": "2026-11-06T17:18:47.830", "metrics": {"cvssMetricV31": [{"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-2026-64325", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:35:02.893715Z", "version": "2.0.3"}}]}, "published": "2026-07-25T10:17:14.097", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/351dd7d2c80d23e56dcce6faa4e62bea5b0877c7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/77e7b127472a191e086e1e0b1b051703f33b1801"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d16713c06006669c7162dfab1cedf4cb24429311"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: wifi: mt76: mt7921/mt7925: fix NULL dereference in CSA beacon", "id": "2507291", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507291"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["A flaw was found in the Linux kernel's mt76 Wi-Fi driver, affecting mt7921 and mt7925 chipsets. When a channel-switch announcement (CSA) beacon is received, a timing issue can occur if a station disconnects before a queued work item processes the beacon. This can lead to a NULL pointer dereference in the mt7921_channel_switch_rx_beacon() or mt7925_channel_switch_rx_beacon() functions, causing a system crash. A remote attacker could potentially exploit this vulnerability to trigger a Denial of Service (DoS)."], "name": "CVE-2026-64325", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "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"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "impact": "important", "package_name": "erlang27", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64325\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64325\nhttps://lore.kernel.org/linux-cve-announce/2026072512-CVE-2026-64325-7fc9@gregkh/T"], "threat_severity": "Moderate"}

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