CriticalFix available

firmware: arm_ffa: Snapshot notifier callbacks under lock

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Snapshot notifier callbacks under lock Both notification handlers currently look up a notifier callback under notify_lock, drop the lock, and then dereference the returned notifier entry. A concurrent unregister can delete and free that entry in the gap, leaving the handler to dereference stale memory. Copy the callback pointer and callback data while notify_lock is still held and invoke the callback only after the lock is dropped. This keeps the existing callback execution model while removing the use-after-free window in both the framework and non-framework notification paths.

Products: Kernel
Affected versions: Not specified
Fixed versions: 6.18.34, 7.0.11
CVEs: CVE-2026-64080
Confirmed fixed CVEs: Not specified
Updated in this feed: 5 Nov 2026, 05:26 UTC · Revision 1

Source evidence

firmware: arm_ffa: Snapshot notifier callbacks under lock

core-osv · Original source

Published 19 Jul 2026, 15:39 UTC

osv:CVE-2026-64080

Kernel

Fixed versions: 6.18.34, 7.0.11

Complete source record

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  "url": "https://osv.dev/vulnerability/CVE-2026-64080",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "firmware: arm_ffa: Snapshot notifier callbacks under lock",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Snapshot notifier callbacks under lock Both notification handlers currently look up a notifier callback under notify_lock, drop the lock, and then dereference the returned notifier entry. A concurrent unregister can delete and free that entry in the gap, leaving the handler to dereference stale memory. Copy the callback pointer and callback data while notify_lock is still held and invoke the callback only after the lock is dropped. This keeps the existing callback execution model while removing the use-after-free window in both the framework and non-framework notification paths.",
    "evidence": "osv:CVE-2026-64080",
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          "evidence": "/affected/1/package/name"
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        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.34",
            "evidence": "/affected/1/ranges"
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          {
            "value": "7.0.11",
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      "modified": "2026-10-28T02:30:43.225739046Z",
      "provider": "osv",
      "references": [
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  "source_id": "core-osv",
  "document_id": 510697,
  "published_at": "2026-07-19T15:39:52.818+00:00"
}