CVE-2026-43020

HIGH EPSS 2.9%
Published May 1, 20262mo ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published May 1, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
2.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

Affected Products 13

VendorProductVersionRange
linuxlinux_kernel*≥3.4  –  <5.10.253
linuxlinux_kernel*≥5.11  –  <5.15.203
linuxlinux_kernel*≥5.16  –  <6.1.168
linuxlinux_kernel*≥6.2  –  <6.6.134
linuxlinux_kernel*≥6.7  –  <6.12.81
linuxlinux_kernel*≥6.13  –  <6.18.22
linuxlinux_kernel*≥6.19  –  <6.19.12
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/0f37d1e65c6d71ad94ccfb5c602163c525db789d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/257cdb960d8ff6d60bb6461b03c814b6cf0c9e64
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/40ba329e8b4cd2fb11b0caf5e6a543ceaebb6009
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/50fb64defa72a3fecd0af1ca7c6b47b5c5c2b257
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/82f342b3b006ca1d65f4890c05f2ec32fcb808b6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b8dbe9648d69059cfe3a28917bfbf7e61efd7f15
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c34577f517b556fb6ca173d45bf7e766ae2564ce
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f71695e81f4cb428f3c7e2138eae88199005b52c
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0f37d1e65c6d71ad94ccfb5c602163c525db789d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/257cdb960d8ff6d60bb6461b03c814b6cf0c9e64
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/40ba329e8b4cd2fb11b0caf5e6a543ceaebb6009
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/50fb64defa72a3fecd0af1ca7c6b47b5c5c2b257
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/82f342b3b006ca1d65f4890c05f2ec32fcb808b6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b8dbe9648d69059cfe3a28917bfbf7e61efd7f15
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c34577f517b556fb6ca173d45bf7e766ae2564ce
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f71695e81f4cb428f3c7e2138eae88199005b52c
    Patch