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CVE-2026-43020

Bluetooth: MGMT: validate LTK enc_size on load PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 346af67b8d116f01ef696fd47959a55deb2db8b6 before 0f37d1e65c6d71ad94ccfb5c602163c525db789d; affected 346af67b8d116f01ef696fd47959a55deb2db8b6 before 257cdb960d8ff6d60bb6461b03c814b6cf0c9e64; affected 346af67b8d116f01ef696fd47959a55deb2db8b6 before c34577f517b556fb6ca173d45bf7e766ae2564ce; affected 346af67b8d116f01ef696fd47959a55deb2db8b6 before f71695e81f4cb428f3c7e2138eae88199005b52c; affected 346af67b8d116f01ef696fd47959a55deb2db8b6 before 82f342b3b006ca1d65f4890c05f2ec32fcb808b6; affected 346af67b8d116f01ef696fd47959a55deb2db8b6 before 50fb64defa72a3fecd0af1ca7c6b47b5c5c2b257; affected 346af67b8d116f01ef696fd47959a55deb2db8b6 before 40ba329e8b4cd2fb11b0caf5e6a543ceaebb6009; affected 346af67b8d116f01ef696fd47959a55deb2db8b6 before b8dbe9648d69059cfe3a28917bfbf7e61efd7f15
Linux / Linuxaffected 3.4; unaffected 0 before 3.4; unaffected 5.10.253 through 5.10.*; unaffected 5.15.203 through 5.15.*; unaffected 6.1.168 through 6.1.*; unaffected 6.6.134 through 6.6.*; unaffected 6.12.81 through 6.12.*; unaffected 6.18.22 through 6.18.*; unaffected 6.19.12 through 6.19.*; unaffected 7.0 through *

CWE

No CWE identifiers supplied.

References