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Back to active CVEs
High · CVSS 8.8CVE-2025-40318

Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_onceCVE-2025-40318

Answer in brief

CVE-2025-40318 records a High severity (CVSS 8.8) vulnerability in Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Dec 8, 2025Updated Oct 15, 2026Source checked Oct 15, 2026First seen by HOL Oct 15, 2026Material review Oct 15, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.8
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=f00f36db76eb8fd10d13e80e2590f23b5beaa54d <0a94f7e017438935c09ef833a1aa908ad9875213 || >=1499f79995c7ee58e3bfeeff75f6d1b37dcda881 <932c0a4f77ac13e526fdd5b42914d29c9821d389 || >=505ea2b295929e7be2b4e1bc86ee31cb7862fb01 <ae76cf6c2c842944c6514c57df54d728f1916553 || >=505ea2b295929e7be2b4e1bc86ee31cb7862fb01 <9cd536970192b72257afcdfba0bfc09993e6f19c || >=505ea2b295929e7be2b4e1bc86ee31cb7862fb01 <09b0cd1297b4dbfe736aeaa0ceeab2265f47f772 || 357603f4d396d85fbf0045512efaf1d7f7394ed7 || >=6.1.120 <6.1.159 || >=6.6.51 <6.6.117 || >=6.8.9 <6.90a94f7e017438935c09ef833a1aa908ad9875213, 932c0a4f77ac13e526fdd5b42914d29c9821d389, ae76cf6c2c842944c6514c57df54d728f1916553, 9cd536970192b72257afcdfba0bfc09993e6f19c, 09b0cd1297b4dbfe736aeaa0ceeab2265f47f772, 6.1.159, 6.6.117, 6.9
Linux/Linuxgeneric6.9Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 0a94f7e017438935c09ef833a1aa908ad9875213 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Dec 8, 2025

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 15, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once hci_cmd_sync_dequeue_once() does lookup and then cancel the entry under two separate lock sections. Meanwhile, hci_cmd_sync_work() can also delete the same entry, leading to double list_del() and "UAF". Fix this by holding cmd_sync_work_lock across both lookup and cancel, so that the entry cannot be removed concurrently.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • MP4v2 through 2.1.3 Heap Out-of-Bounds Read via MP4File::GetChaptersSame generic ecosystem
  • libical through 4.0.6 Heap Out-of-Bounds Read via icalvalue_decode_ical_stringSame generic ecosystem
  • libmodplug through 0.8.9.1 Heap Out-of-Bounds Write via CSoundFile::ReadDSMSame generic ecosystem
  • libmodplug through 0.8.9.1 Heap Out-of-Bounds Read via CSoundFile::ReadAMS2Same generic ecosystem
  • LibRaw through 0.22.2 Heap Out-of-Bounds Read via parseNikonMakernote ShotInfoSame generic ecosystem
  • unarr through 1.1.1 Off-by-One Heap Buffer Overflow via tar_get_nameSame generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 15, 2026
References
5 linked sources
Open source record