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CVE-2026-53251Bluetooth: ISO: Fix not releasing hdev reference on iso_conn_big_sync
- 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: ISO: Fix not releasing hdev reference on iso_conn_big_sync hci_get_route() returns a reference-counted hci_dev pointer via hci_dev_hold(). The function exits normally or with an error without ever releasing it.
Timeline
ID reserved
By Linux
- 16 days later
· 16 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 · Analyzed | 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
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 1360e5b6ce63d63d23223a659ca2bbafa30a53aa – < 4bbec25f47b930101294fd310c627c3f53e9661f
- affected 07a9342b94a91b306ed1cf6aa8254aea210764c9 – < 33d677d2e3713d98012c3dbd4a9207f7d785b854
- affected 07a9342b94a91b306ed1cf6aa8254aea210764c9 – < 23e8eb16820b866528fb300dc67fe3f67f00ef62
- affected 07a9342b94a91b306ed1cf6aa8254aea210764c9 – < 5cbf290b79351971f20c7a533247e8d58a3f970c
- affected bfec1e55314896bf4a4cfdb3a9ad4872be9f06ed
- affected 6.12.2 – < 6.12.94
- affected 6.11.11 – < 6.12
- affected 6.13
- unaffected < 6.13
- unaffected 6.12.94 – ≤ 6.12.*
- unaffected 6.18.36 – ≤ 6.18.*
- unaffected 7.0.13 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References4
- https://git.kernel.org/stable/c/4bbec25f47b930101294fd310c627c3f53e9661f (opens in a new tab)
- https://git.kernel.org/stable/c/33d677d2e3713d98012c3dbd4a9207f7d785b854 (opens in a new tab)
- https://git.kernel.org/stable/c/23e8eb16820b866528fb300dc67fe3f67f00ef62 (opens in a new tab)
- https://git.kernel.org/stable/c/5cbf290b79351971f20c7a533247e8d58a3f970c (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-2026-39202 (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-2026-53251)Record last updated .