FKIE_CVE-2026-80944
Vulnerability from fkie_nvd - Published: 2026-09-11 20:18 - Updated: 2026-09-14 13:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
wifi: mwifiex: Detach sync cmd buffer on interrupted wait
mwifiex synchronous commands keep the caller-provided data buffer in
cmd_node->data_buf. Several callers pass stack-allocated objects there.
If wait_event_interruptible_timeout() is interrupted, the caller can
return and release that stack object while the firmware command is still
the current command. A late firmware response then reaches the normal
response handler, which can copy data through cmd_node->data_buf into the
stale stack address.
This fixes a stack corruption observed during repeated association and
disassociation cycles. The panic trace showed the command wait being
interrupted immediately before a bad pointer dereference:
cmd_wait_q terminated: -512
Unable to handle kernel paging request at virtual address 002c583837384662
Kernel panic - not syncing: stack-protector: Kernel stack is corrupted
...
Tainted: [M]=MACHINE_CHECK
The fault address decodes as little-endian ASCII:
0x002c583837384662 -> "bF878X,\0"
which is a fragment of the VERSION_EXT firmware string exposed as
debugfs "verext":
w8997o-V4, RF878X, FP92, 16.92.21.p153.7
The same runs also showed corrupted control data containing:
0x2400372e333531 -> "153.7\0$"
which is the tail of the same VERSION_EXT string. This points at a late
VERSION_EXT response writing through a stale stack-backed data_buf after
the interrupted wait returned.
After cancelling pending commands on an interrupted or timed-out wait,
detach the caller-owned data buffer from the still-current command. This
preserves the existing command cancellation behaviour while preventing a
late response from writing through a pointer whose lifetime ended with the
waiting caller.
Tested on an i.MX8MP board using an 88W8997.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"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": "8c67b8c50286e0cb7f18d667e6a37a2ec6e08ff9",
"status": "affected",
"version": "3d026d09b28dda24777129a931634949c75a9181",
"versionType": "git"
},
{
"lessThan": "9024c7729eb523cf4f3a4203966d3a4aaabf030d",
"status": "affected",
"version": "3d026d09b28dda24777129a931634949c75a9181",
"versionType": "git"
},
{
"lessThan": "9e06c9c8a1f10c55d9bc5d139656d58795e64483",
"status": "affected",
"version": "3d026d09b28dda24777129a931634949c75a9181",
"versionType": "git"
},
{
"lessThan": "f2134d6ff30cd6e1bf63d6b0a5d8e0839f0168b3",
"status": "affected",
"version": "3d026d09b28dda24777129a931634949c75a9181",
"versionType": "git"
},
{
"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": "5.10.*",
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.157",
"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-\u003edata_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-\u003edata_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 -\u003e \"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 -\u003e \"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": "2026-09-14T13:18:50.287",
"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/8c67b8c50286e0cb7f18d667e6a37a2ec6e08ff9"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/9024c7729eb523cf4f3a4203966d3a4aaabf030d"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/9e06c9c8a1f10c55d9bc5d139656d58795e64483"
},
{
"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"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/f2134d6ff30cd6e1bf63d6b0a5d8e0839f0168b3"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
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- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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