{ "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": "2026-10-19T08:45:28.363Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:45:28.363Z" }, "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": "8c67b8c50286e0cb7f18d667e6a37a2ec6e08ff9", "status": "affected", "versionType": "git" }, { "version": "3d026d09b28dda24777129a931634949c75a9181", "lessThan": "9024c7729eb523cf4f3a4203966d3a4aaabf030d", "status": "affected", "versionType": "git" }, { "version": "3d026d09b28dda24777129a931634949c75a9181", "lessThan": "9e06c9c8a1f10c55d9bc5d139656d58795e64483", "status": "affected", "versionType": "git" }, { "version": "3d026d09b28dda24777129a931634949c75a9181", "lessThan": "f2134d6ff30cd6e1bf63d6b0a5d8e0839f0168b3", "status": "affected", "versionType": "git" }, { "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": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.157", "lessThanOrEqual": "6.6.*", "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", "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": "5.10.270" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "5.15.221" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.1.188" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.6.157" }, { "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" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/8c67b8c50286e0cb7f18d667e6a37a2ec6e08ff9" }, { "url": "https://git.kernel.org/stable/c/9024c7729eb523cf4f3a4203966d3a4aaabf030d" }, { "url": "https://git.kernel.org/stable/c/9e06c9c8a1f10c55d9bc5d139656d58795e64483" }, { "url": "https://git.kernel.org/stable/c/f2134d6ff30cd6e1bf63d6b0a5d8e0839f0168b3" }, { "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" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-80944", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-10-16T19:21:27.519317Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:26:36.609Z" } } ] } }