Medium 5.5Published May 1, 2026

CVE-2026-43017Bluetooth: MGMT: validate mesh send advertising payload length

Updated under an hour ago (Oct 27, 2026, 2:20 AM ET)

Does this affect you?

It affects Linux and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: validate mesh send advertising payload length mesh_send() currently bounds MGMT_OP_MESH_SEND by total command length, but it never verifies that the bytes supplied for the flexible adv_data[] array actually match the embedded adv_data_len field. MGMT_MESH_SEND_SIZE only covers the fixed header, so a truncated command can still pass the existing 20..50 byte range check and later drive the async mesh send path past the end of the queued command buffer. Keep rejecting zero-length and oversized advertising payloads, but validate adv_data_len explicitly and require the command length to exactly match the flexible array size before queueing the request.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from b338d91703fae6f6afd67f3f75caa3b8f36ddef3 before 24fa32369cf15d8fc918bdfe94097b12e6acada0; from b338d91703fae6f6afd67f3f75caa3b8f36ddef3 before 244b639e6a3a8e26241e201004a3a9f764476631; from b338d91703fae6f6afd67f3f75caa3b8f36ddef3 before 0b706fb2294aff3adfd54653bda1b5e356ad4566; from b338d91703fae6f6afd67f3f75caa3b8f36ddef3 before edb5898cfa91afe7e8f83eda18d93034c953d632; from b338d91703fae6f6afd67f3f75caa3b8f36ddef3 before 562ed1954f0c1bff3422b7b752bd3dacf185edbf; from b338d91703fae6f6afd67f3f75caa3b8f36ddef3 before bda93eec78cdbfe5cda00785cefebd443e56b88b	CNA record
linux linux_kernel linux:linux_kernel	from 6.1 before 6.1.168; from 6.2 before 6.6.134; from 6.7 before 6.12.81; from 6.13 before 6.18.22; from 6.19 before 6.19.12; 7.0; 7.0; 7.0; and 3 more ranges	NVD

References

References

https://git.kernel.org/stable/c/24fa32369cf15d8fc918bdfe94097b12e6acada0	patch
https://git.kernel.org/stable/c/244b639e6a3a8e26241e201004a3a9f764476631	patch
https://git.kernel.org/stable/c/0b706fb2294aff3adfd54653bda1b5e356ad4566	patch
https://git.kernel.org/stable/c/edb5898cfa91afe7e8f83eda18d93034c953d632	patch
https://git.kernel.org/stable/c/562ed1954f0c1bff3422b7b752bd3dacf185edbf	patch
https://git.kernel.org/stable/c/bda93eec78cdbfe5cda00785cefebd443e56b88b	patch

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.