wifi: ath11k: fix overreads in ath11k_wmi_process_csa_switch_count_event()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-90407
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:40 UTC
Updated2026-09-18 18:17:57 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix overreads in ath11k_wmi_process_csa_switch_count_event() There is no policy entry for WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT, so the parse infrastructure does not enforce a minimum length for the event struct. Additionally, the num_vdevs field is taken directly from firmware and used as a loop bound over the vdev_ids array without checking that it fits within the TLV payload. Either condition can cause an out-of-bounds read. Add a TLV policy entry for WMI_TAG_PDEV_CSA_SWITCH_COUNT_STATUS_EVENT so the parse infrastructure enforces a minimum length for the fixed-size event struct. Add a helper ath11k_wmi_tlv_data_len() to recover the payload length of a parsed TLV from the header preceding its data pointer. Use it in ath11k_wmi_process_csa_switch_count_event() to bound num_vdevs before the loop. Compile tested only.

Risk And Classification

Primary CVSS: v3.1 7.7 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.002000000 probability, percentile 0.101470000 (date 2026-09-18)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.7HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
3.1CNADECLARED7.7HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d5c65159f2895379e11ca13f62feabe93278985d f760b7d7e43584d2fa9bffcec1a04e502609f827 git Not specified
CNA Linux Linux affected d5c65159f2895379e11ca13f62feabe93278985d d6625dc5f1fe42cd81b8c57a1f5317afb9b410ce git Not specified
CNA Linux Linux affected d5c65159f2895379e11ca13f62feabe93278985d 0364926fb4bfb5b798e5fe2785b3023b4f767327 git Not specified
CNA Linux Linux affected d5c65159f2895379e11ca13f62feabe93278985d 5de2b8c53714ad58f2fda118cd29ebbe31b38665 git Not specified
CNA Linux Linux affected d5c65159f2895379e11ca13f62feabe93278985d 208d7fdb85976a737a715b81d54efaff6703880c git Not specified
CNA Linux Linux affected 5.6 Not specified
CNA Linux Linux unaffected 5.6 semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 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/f760b7d7e43584d2fa9bffcec1a04e502609f827 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/208d7fdb85976a737a715b81d54efaff6703880c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5de2b8c53714ad58f2fda118cd29ebbe31b38665 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0364926fb4bfb5b798e5fe2785b3023b4f767327 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d6625dc5f1fe42cd81b8c57a1f5317afb9b410ce 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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