{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80944", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.803Z", "datePublished": "2026-09-11T19:42:16.076Z", "dateUpdated": "2026-09-13T06:28:20.099Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-13T06:28:20.099Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mwifiex: Detach sync cmd buffer on interrupted wait\n\nmwifiex synchronous commands keep the caller-provided data buffer in\ncmd_node->data_buf. Several callers pass stack-allocated objects there.\n\nIf wait_event_interruptible_timeout() is interrupted, the caller can\nreturn and release that stack object while the firmware command is still\nthe current command. A late firmware response then reaches the normal\nresponse handler, which can copy data through cmd_node->data_buf into the\nstale stack address.\n\nThis fixes a stack corruption observed during repeated association and\ndisassociation cycles. The panic trace showed the command wait being\ninterrupted immediately before a bad pointer dereference:\n\n cmd_wait_q terminated: -512\n Unable to handle kernel paging request at virtual address 002c583837384662\n Kernel panic - not syncing: stack-protector: Kernel stack is corrupted\n ...\n Tainted: [M]=MACHINE_CHECK\n\nThe fault address decodes as little-endian ASCII:\n\n 0x002c583837384662 -> \"bF878X,\\0\"\n\nwhich is a fragment of the VERSION_EXT firmware string exposed as\ndebugfs \"verext\":\n\n w8997o-V4, RF878X, FP92, 16.92.21.p153.7\n\nThe same runs also showed corrupted control data containing:\n\n 0x2400372e333531 -> \"153.7\\0$\"\n\nwhich is the tail of the same VERSION_EXT string. This points at a late\nVERSION_EXT response writing through a stale stack-backed data_buf after\nthe interrupted wait returned.\n\nAfter cancelling pending commands on an interrupted or timed-out wait,\ndetach the caller-owned data buffer from the still-current command. This\npreserves the existing command cancellation behaviour while preventing a\nlate response from writing through a pointer whose lifetime ended with the\nwaiting caller.\n\nTested on an i.MX8MP board using an 88W8997."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The stale data_buf write is reached from local cfg80211/nl80211 and debugfs paths that call mwifiex_send_cmd(..., sync) and sleep in mwifiex_wait_queue_complete(), not from parsing received 802.11 frames, so this is a local syscall/ioctl issue rather than an adjacent RF or remote network vector.\nAC:L - The attacker issues a synchronous mwifiex command and signals the waiting thread (or races a second nl80211 dump against an in-flight command); cancel_all_pending_cmd() intentionally leaves curr_cmd queued for the firmware reply, so the late write-through data_buf does not depend on an uncontrolled race or layout.\nPR:L - NL80211_CMD_GET_STATION is unprivileged and still sends sync firmware commands whose interrupted wait runs mwifiex_cancel_all_pending_cmd() against curr_cmd; remain-on-channel and other cfg80211 ops need only CAP_NET_ADMIN, which is a low-privileged local role on mwifiex phones, Chromebooks, and embedded boards rather than init-namespace root.\nUI:N - The attacker performs the nl80211 or debugfs request and delivers the interrupting signal themselves; no separate victim action such as mounting a filesystem or opening a file is required.\nS:U - The corruption hits host kernel stack or heap in the mwifiex command-response path and stays within the same kernel security authority, yielding local privilege escalation or a host panic rather than a VM, IOMMU, or sandbox escape.\nC:H - A late firmware response memcpy's through the dangling cmd_node->data_buf into reused kernel stack (VERSION_EXT copies 128 bytes) or a kfree'd testmode hostcmd buffer (up to 2048 bytes), a use-after-free write that can be reclaimed for arbitrary kernel read.\nI:H - The same stale-pointer write smashes kernel stack frames or a freed heap object, which is exploitable for control-flow hijacking; the observed VERSION_EXT ASCII overwrite already tripped the stack protector.\nA:H - The bug was observed as a kernel paging fault and stack-protector panic (cmd_wait_q terminated: -512, Kernel panic - not syncing: stack-protector: Kernel stack is corrupted), which is a full host availability loss."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/marvell/mwifiex/sta_ioctl.c"], "versions": [{"version": "3d026d09b28dda24777129a931634949c75a9181", "lessThan": "20ee9c03f261bf6ac59331e2ca7b46b23646412a", "status": "affected", "versionType": "git"}, {"version": "3d026d09b28dda24777129a931634949c75a9181", "lessThan": "b1bbeb8970eeb6c6bf3cd5314138103f7b69446d", "status": "affected", "versionType": "git"}, {"version": "3d026d09b28dda24777129a931634949c75a9181", "lessThan": "d29a165588b6a0cf7a38db5cbd602aef7ef8c658", "status": "affected", "versionType": "git"}, {"version": "3d026d09b28dda24777129a931634949c75a9181", "lessThan": "ef06882c7d8a7400b67d0d003b1008093dd589ed", "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/marvell/mwifiex/sta_ioctl.c"], "versions": [{"version": "3.15", "status": "affected"}, {"version": "0", "lessThan": "3.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "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": "3.15", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/20ee9c03f261bf6ac59331e2ca7b46b23646412a"}, {"url": "https://git.kernel.org/stable/c/b1bbeb8970eeb6c6bf3cd5314138103f7b69446d"}, {"url": "https://git.kernel.org/stable/c/d29a165588b6a0cf7a38db5cbd602aef7ef8c658"}, {"url": "https://git.kernel.org/stable/c/ef06882c7d8a7400b67d0d003b1008093dd589ed"}], "title": "wifi: mwifiex: Detach sync cmd buffer on interrupted wait", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/wireless/marvell/mwifiex/sta_ioctl.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "20ee9c03f261bf6ac59331e2ca7b46b23646412a", "status": "affected", "version": "3d026d09b28dda24777129a931634949c75a9181", "versionType": "git"}, {"lessThan": "b1bbeb8970eeb6c6bf3cd5314138103f7b69446d", "status": "affected", "version": "3d026d09b28dda24777129a931634949c75a9181", "versionType": "git"}, {"lessThan": "d29a165588b6a0cf7a38db5cbd602aef7ef8c658", "status": "affected", "version": "3d026d09b28dda24777129a931634949c75a9181", "versionType": "git"}, {"lessThan": "ef06882c7d8a7400b67d0d003b1008093dd589ed", "status": "affected", "version": "3d026d09b28dda24777129a931634949c75a9181", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/wireless/marvell/mwifiex/sta_ioctl.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.15"}, {"lessThan": "3.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mwifiex: Detach sync cmd buffer on interrupted wait\n\nmwifiex synchronous commands keep the caller-provided data buffer in\ncmd_node->data_buf. Several callers pass stack-allocated objects there.\n\nIf wait_event_interruptible_timeout() is interrupted, the caller can\nreturn and release that stack object while the firmware command is still\nthe current command. A late firmware response then reaches the normal\nresponse handler, which can copy data through cmd_node->data_buf into the\nstale stack address.\n\nThis fixes a stack corruption observed during repeated association and\ndisassociation cycles. The panic trace showed the command wait being\ninterrupted immediately before a bad pointer dereference:\n\n cmd_wait_q terminated: -512\n Unable to handle kernel paging request at virtual address 002c583837384662\n Kernel panic - not syncing: stack-protector: Kernel stack is corrupted\n ...\n Tainted: [M]=MACHINE_CHECK\n\nThe fault address decodes as little-endian ASCII:\n\n 0x002c583837384662 -> \"bF878X,\\0\"\n\nwhich is a fragment of the VERSION_EXT firmware string exposed as\ndebugfs \"verext\":\n\n w8997o-V4, RF878X, FP92, 16.92.21.p153.7\n\nThe same runs also showed corrupted control data containing:\n\n 0x2400372e333531 -> \"153.7\\0$\"\n\nwhich is the tail of the same VERSION_EXT string. This points at a late\nVERSION_EXT response writing through a stale stack-backed data_buf after\nthe interrupted wait returned.\n\nAfter cancelling pending commands on an interrupted or timed-out wait,\ndetach the caller-owned data buffer from the still-current command. This\npreserves the existing command cancellation behaviour while preventing a\nlate response from writing through a pointer whose lifetime ended with the\nwaiting caller.\n\nTested on an i.MX8MP board using an 88W8997."}], "id": "CVE-2026-80944", "lastModified": "2026-09-13T07:17:01.680", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-11T20:18:59.923", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/20ee9c03f261bf6ac59331e2ca7b46b23646412a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b1bbeb8970eeb6c6bf3cd5314138103f7b69446d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d29a165588b6a0cf7a38db5cbd602aef7ef8c658"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ef06882c7d8a7400b67d0d003b1008093dd589ed"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel mwifiex Wi-Fi driver: Denial of Service due to memory corruption", "id": "2532163", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532163"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in the Linux kernel's mwifiex Wi-Fi driver. When a synchronous command's wait operation is interrupted, the driver can attempt to write data to a memory location that has already been released. This memory corruption can lead to a system crash (kernel panic), resulting in a Denial of Service (DoS)."], "name": "CVE-2026-80944", "public_date": "2026-09-11T19:42:16Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80944\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80944\nhttps://git.kernel.org/stable/c/20ee9c03f261bf6ac59331e2ca7b46b23646412a\nhttps://git.kernel.org/stable/c/b1bbeb8970eeb6c6bf3cd5314138103f7b69446d\nhttps://git.kernel.org/stable/c/d29a165588b6a0cf7a38db5cbd602aef7ef8c658\nhttps://git.kernel.org/stable/c/ef06882c7d8a7400b67d0d003b1008093dd589ed"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3d026d09b28dda24777129a931634949c75a9181,20ee9c03f261bf6ac59331e2ca7b46b23646412a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3d026d09b28dda24777129a931634949c75a9181,b1bbeb8970eeb6c6bf3cd5314138103f7b69446d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3d026d09b28dda24777129a931634949c75a9181,d29a165588b6a0cf7a38db5cbd602aef7ef8c658)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3d026d09b28dda24777129a931634949c75a9181,ef06882c7d8a7400b67d0d003b1008093dd589ed)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "3.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.109,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.50,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.4,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T01:45:03.771609+00:00", "updated": "2026-09-13T08:45:12.084528+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}