CVE-2023-53386: Bluetooth: Fix potential use-after-free when clear keys

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• linux linux kernel5.7 and later · before 5.10.195
• linux linux kernel5.11 and later · before 5.15.132
• linux linux kernel5.16 and later · before 6.1.53
• linux linux kernel6.2 and later · before 6.4.16
• linux linux kernel6.5 and later · before 6.5.3

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

• Linux Linux

  • 5.7affected
  • d7d41682efc25d58b5bd8b80e85e3c9ce586635c and later · before e87da6a0ac6e631454e7da53a76aa9fe44aaa5ddaffected · git
  • d7d41682efc25d58b5bd8b80e85e3c9ce586635c and later · before 942d8cefb022f384d5424f8b90c7878f3f93726faffected · git
  • d7d41682efc25d58b5bd8b80e85e3c9ce586635c and later · before 94617b736c25091b60e514e2e7aeafcbbee6b700affected · git
  • d7d41682efc25d58b5bd8b80e85e3c9ce586635c and later · before da19f35868dfbecfff4f81166c054d2656cb1be4affected · git
  • d7d41682efc25d58b5bd8b80e85e3c9ce586635c and later · before 35cc42f04bc49f0656f6840cb7451b3df6049649affected · git
  • d7d41682efc25d58b5bd8b80e85e3c9ce586635c and later · before 3673952cf0c6cf81b06c66a0b788abeeb02ff3aeaffected · git
  • before 5.7not affected · semver
  • 5.10.195 and later · up to and including 5.10.*not affected · semver
  • 5.15.132 and later · up to and including 5.15.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
  89Now
• CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
  85Now
• CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
  83Now

Published before and after this one in the same product

• ← EarlierCVE-2023-53384Sep 18, 2025 · wifi: mwifiex: avoid possible NULL skb pointer dereference
  22Monitor
• ← EarlierCVE-2023-53385Sep 18, 2025 · media: mdp3: Fix resource leaks in of_find_device_by_node
  22Monitor
• Later →CVE-2023-53387Sep 18, 2025 · scsi: ufs: core: Fix device management cmd timeout flow
  22Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1free(dev->buf);2/* ... another thread is still running ... */3process(dev->buf);

1lock(&dev->lock);2free(dev->buf);3dev->buf = NULL;4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.