CVE-2026-53255Bluetooth: MGMT: validate advertising TLV before type checks
Updated under an hour ago ()
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It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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].
- CVSS
- 7.1 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 2bb36870e8cb29949ef9acec37129cd8e70f1857 before 13ad995071a06570668dd8daab3616c247c72080; from 2bb36870e8cb29949ef9acec37129cd8e70f1857 before 06fcbd79c3c360a50f9be9d370769bbd738d0976; from 2bb36870e8cb29949ef9acec37129cd8e70f1857 before f7093ac233c1e7f51d125534f46067772a113175; from 2bb36870e8cb29949ef9acec37129cd8e70f1857 before 74c08e4db35a476c3462aeb65846f955be732626; from 2bb36870e8cb29949ef9acec37129cd8e70f1857 before 18fea1cb0c2599752e908c8217490f73ddd33e00; 2bb36870e8cb29949ef9acec37129cd8e70f1857 builds before 1a3c8ffbb469859b076445af44bdfa6a711d483e; 2bb36870e8cb29949ef9acec37129cd8e70f1857 builds before 2a3f3ed9e198ae23c15859ace2f9ca6cfdc35b57; from 2bb36870e8cb29949ef9acec37129cd8e70f1857 before de23fb62259aa01d294f77238ae3b835eb674413 | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | from 4.9 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.94; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 7.1; and 5 more ranges | NVD |
References
- https://git.kernel.org/stable/c/13ad995071a06570668dd8daab3616c247c72080patch
- https://git.kernel.org/stable/c/06fcbd79c3c360a50f9be9d370769bbd738d0976patch
- https://git.kernel.org/stable/c/f7093ac233c1e7f51d125534f46067772a113175patch
- https://git.kernel.org/stable/c/74c08e4db35a476c3462aeb65846f955be732626patch
- https://git.kernel.org/stable/c/18fea1cb0c2599752e908c8217490f73ddd33e00patch
- https://git.kernel.org/stable/c/1a3c8ffbb469859b076445af44bdfa6a711d483epatch
- https://git.kernel.org/stable/c/2a3f3ed9e198ae23c15859ace2f9ca6cfdc35b57patch
- https://git.kernel.org/stable/c/de23fb62259aa01d294f77238ae3b835eb674413patch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.