CVE-2026-53255Bluetooth: MGMT: validate advertising TLV before type checks
- 7.1HighCVSS 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: MGMT: validate advertising TLV before type checks tlv_data_is_valid() reads each advertising data field length from data[i], then inspects data[i + 1] for managed EIR types before checking that the current field still fits inside the supplied buffer. A malformed field whose length byte is the last byte of the buffer can therefore make the parser read one byte past the advertising data. KASAN reported the following when a malformed MGMT_OP_ADD_ADVERTISING request reached that path: BUG: KASAN: vmalloc-out-of-bounds in tlv_data_is_valid() Read of size 1 Call trace: tlv_data_is_valid() add_advertising() hci_mgmt_cmd() hci_sock_sendmsg() Move the existing element-length check before any type-octet inspection so each non-empty element is proven to contain its type byte before the parser looks at data[i + 1].
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 · Modified | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (14 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: High 7.1.
Affected products
- affected 2bb36870e8cb29949ef9acec37129cd8e70f1857 – < 13ad995071a06570668dd8daab3616c247c72080
- affected 2bb36870e8cb29949ef9acec37129cd8e70f1857 – < 06fcbd79c3c360a50f9be9d370769bbd738d0976
- affected 2bb36870e8cb29949ef9acec37129cd8e70f1857 – < f7093ac233c1e7f51d125534f46067772a113175
- affected 2bb36870e8cb29949ef9acec37129cd8e70f1857 – < 74c08e4db35a476c3462aeb65846f955be732626
- affected 2bb36870e8cb29949ef9acec37129cd8e70f1857 – < 18fea1cb0c2599752e908c8217490f73ddd33e00
- affected 2bb36870e8cb29949ef9acec37129cd8e70f1857 – < 1a3c8ffbb469859b076445af44bdfa6a711d483e
- affected 2bb36870e8cb29949ef9acec37129cd8e70f1857 – < 2a3f3ed9e198ae23c15859ace2f9ca6cfdc35b57
- affected 2bb36870e8cb29949ef9acec37129cd8e70f1857 – < de23fb62259aa01d294f77238ae3b835eb674413
- affected 4.9
- unaffected < 4.9
- unaffected 5.10.259 – ≤ 5.10.*
- unaffected 5.15.210 – ≤ 5.15.*
- unaffected 6.1.176 – ≤ 6.1.*
- unaffected 6.6.143 – ≤ 6.6.*
- unaffected 6.12.94 – ≤ 6.12.*
- unaffected 6.18.36 – ≤ 6.18.*
- unaffected 7.0.13 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References9
- https://git.kernel.org/stable/c/13ad995071a06570668dd8daab3616c247c72080 (opens in a new tab)
- https://git.kernel.org/stable/c/06fcbd79c3c360a50f9be9d370769bbd738d0976 (opens in a new tab)
- https://git.kernel.org/stable/c/f7093ac233c1e7f51d125534f46067772a113175 (opens in a new tab)
- https://git.kernel.org/stable/c/74c08e4db35a476c3462aeb65846f955be732626 (opens in a new tab)
- https://git.kernel.org/stable/c/18fea1cb0c2599752e908c8217490f73ddd33e00 (opens in a new tab)
- https://git.kernel.org/stable/c/1a3c8ffbb469859b076445af44bdfa6a711d483e (opens in a new tab)
- https://git.kernel.org/stable/c/2a3f3ed9e198ae23c15859ace2f9ca6cfdc35b57 (opens in a new tab)
- https://git.kernel.org/stable/c/de23fb62259aa01d294f77238ae3b835eb674413 (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html (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-2026-39206 (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-2026-53255)Record last updated .