CVE-2026-53364Bluetooth: hci_conn: Fix memory leak in hci_le_big_terminate()
- 5.5MediumCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: Fix memory leak in hci_le_big_terminate() hci_le_big_terminate() allocates iso_list_data via kzalloc_obj but returns 0 without freeing it when neither pa_sync_term nor big_sync_term flags are set after evaluating the PA and BIG sync connection state. This early-return path was introduced when hci_le_big_terminate() was refactored to take struct hci_conn instead of raw u8 parameters, adding PA/BIG flag evaluation logic. The existing kfree() on hci_cmd_sync_queue failure does not cover this path.
Timeline
ID reserved
By Linux
- 34 days later
· 34 days later
Published
- 4 months later
· 4 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected a8444cca514edd4e47e322926b10516a5a6d7016 – < 488e808e3fa53200f3ef3324c45fcba4ae9f4972
- affected a7bcffc673de219af2698fbb90627016233de67b – < e6b78019664dfe37c3dc707f50e7b453d6c7726d
- affected a7bcffc673de219af2698fbb90627016233de67b – < a59d4f4217e6200ca9180643e5738a87d3fa8be0
- affected a7bcffc673de219af2698fbb90627016233de67b – < bfa9d28960ed677d556bdf097073bc3129686229
- affected 087812a6119b4cd5c9d658b48aee40a25707a1c6
- affected 6.16.4 – < 6.17
- affected 6.17
- unaffected < 6.17
- unaffected 6.18.35 – ≤ 6.18.*
- unaffected 7.0.12 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References4
- https://git.kernel.org/stable/c/488e808e3fa53200f3ef3324c45fcba4ae9f4972 (opens in a new tab)
- https://git.kernel.org/stable/c/e6b78019664dfe37c3dc707f50e7b453d6c7726d (opens in a new tab)
- https://git.kernel.org/stable/c/a59d4f4217e6200ca9180643e5738a87d3fa8be0 (opens in a new tab)
- https://git.kernel.org/stable/c/bfa9d28960ed677d556bdf097073bc3129686229 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-43512 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-53364)Record last updated .