wifi: mwifiex: Detach sync cmd buffer on interrupted wait

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80944
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:18:59 UTC
Updated2026-09-14 13:18:50 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001280000 probability, percentile 0.028320000 (date 2026-09-14)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 3d026d09b28dda24777129a931634949c75a9181 8c67b8c50286e0cb7f18d667e6a37a2ec6e08ff9 git Not specified
CNA Linux Linux affected 3d026d09b28dda24777129a931634949c75a9181 9024c7729eb523cf4f3a4203966d3a4aaabf030d git Not specified
CNA Linux Linux affected 3d026d09b28dda24777129a931634949c75a9181 9e06c9c8a1f10c55d9bc5d139656d58795e64483 git Not specified
CNA Linux Linux affected 3d026d09b28dda24777129a931634949c75a9181 f2134d6ff30cd6e1bf63d6b0a5d8e0839f0168b3 git Not specified
CNA Linux Linux affected 3d026d09b28dda24777129a931634949c75a9181 20ee9c03f261bf6ac59331e2ca7b46b23646412a git Not specified
CNA Linux Linux affected 3d026d09b28dda24777129a931634949c75a9181 b1bbeb8970eeb6c6bf3cd5314138103f7b69446d git Not specified
CNA Linux Linux affected 3d026d09b28dda24777129a931634949c75a9181 d29a165588b6a0cf7a38db5cbd602aef7ef8c658 git Not specified
CNA Linux Linux affected 3d026d09b28dda24777129a931634949c75a9181 ef06882c7d8a7400b67d0d003b1008093dd589ed git Not specified
CNA Linux Linux affected 3.15 Not specified
CNA Linux Linux unaffected 3.15 semver Not specified
CNA Linux Linux unaffected 5.10.270 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.221 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.188 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.109 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/20ee9c03f261bf6ac59331e2ca7b46b23646412a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9024c7729eb523cf4f3a4203966d3a4aaabf030d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d29a165588b6a0cf7a38db5cbd602aef7ef8c658 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f2134d6ff30cd6e1bf63d6b0a5d8e0839f0168b3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ef06882c7d8a7400b67d0d003b1008093dd589ed 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b1bbeb8970eeb6c6bf3cd5314138103f7b69446d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9e06c9c8a1f10c55d9bc5d139656d58795e64483 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8c67b8c50286e0cb7f18d667e6a37a2ec6e08ff9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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