CVE-2026-43020
Bluetooth: MGMT: validate LTK enc_size on load
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: validate LTK enc_size on load Load Long Term Keys stores the user-provided enc_size and later uses it to size fixed-size stack operations when replying to LE LTK requests. An enc_size larger than the 16-byte key buffer can therefore overflow the reply stack buffer. Reject oversized enc_size values while validating the management LTK record so invalid keys never reach the stored key state.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | May 1, 2026 |
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Affected Versions
Linux / Linux
346af67b8d116f01ef696fd47959a55deb2db8b6 < 0f37d1e65c6d71ad94ccfb5c602163c525db789d 346af67b8d116f01ef696fd47959a55deb2db8b6 < 257cdb960d8ff6d60bb6461b03c814b6cf0c9e64 346af67b8d116f01ef696fd47959a55deb2db8b6 < c34577f517b556fb6ca173d45bf7e766ae2564ce 346af67b8d116f01ef696fd47959a55deb2db8b6 < f71695e81f4cb428f3c7e2138eae88199005b52c 346af67b8d116f01ef696fd47959a55deb2db8b6 < 82f342b3b006ca1d65f4890c05f2ec32fcb808b6 346af67b8d116f01ef696fd47959a55deb2db8b6 < 50fb64defa72a3fecd0af1ca7c6b47b5c5c2b257 346af67b8d116f01ef696fd47959a55deb2db8b6 < 40ba329e8b4cd2fb11b0caf5e6a543ceaebb6009 346af67b8d116f01ef696fd47959a55deb2db8b6 < b8dbe9648d69059cfe3a28917bfbf7e61efd7f15
Linux / Linux
3.4
References
git.kernel.org: https://git.kernel.org/stable/c/0f37d1e65c6d71ad94ccfb5c602163c525db789d git.kernel.org: https://git.kernel.org/stable/c/257cdb960d8ff6d60bb6461b03c814b6cf0c9e64 git.kernel.org: https://git.kernel.org/stable/c/c34577f517b556fb6ca173d45bf7e766ae2564ce git.kernel.org: https://git.kernel.org/stable/c/f71695e81f4cb428f3c7e2138eae88199005b52c git.kernel.org: https://git.kernel.org/stable/c/82f342b3b006ca1d65f4890c05f2ec32fcb808b6 git.kernel.org: https://git.kernel.org/stable/c/50fb64defa72a3fecd0af1ca7c6b47b5c5c2b257 git.kernel.org: https://git.kernel.org/stable/c/40ba329e8b4cd2fb11b0caf5e6a543ceaebb6009 git.kernel.org: https://git.kernel.org/stable/c/b8dbe9648d69059cfe3a28917bfbf7e61efd7f15