Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.4, < 5.10.253 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0f37d1e65c6d71ad94ccfb5c602163c525db789dPatch
- https://git.kernel.org/stable/c/257cdb960d8ff6d60bb6461b03c814b6cf0c9e64Patch
- https://git.kernel.org/stable/c/40ba329e8b4cd2fb11b0caf5e6a543ceaebb6009Patch
- https://git.kernel.org/stable/c/50fb64defa72a3fecd0af1ca7c6b47b5c5c2b257Patch
- https://git.kernel.org/stable/c/82f342b3b006ca1d65f4890c05f2ec32fcb808b6Patch
- https://git.kernel.org/stable/c/b8dbe9648d69059cfe3a28917bfbf7e61efd7f15Patch
- https://git.kernel.org/stable/c/c34577f517b556fb6ca173d45bf7e766ae2564cePatch
- https://git.kernel.org/stable/c/f71695e81f4cb428f3c7e2138eae88199005b52cPatch
FAQ
What is CVE-2026-43020?
CVE-2026-43020 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 fix...
How severe is CVE-2026-43020?
CVE-2026-43020 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43020?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.