PatchTheCVECVE-2026-10774: Zephyr's Bluetooth Mesh subnet key management leaks one PSA Crypto key slot on every subnet-key teardown
19
Routine
LOW 2.4UPGRADE
CVE-2026-10774 is a low-severity flaw (CVSS 2.4) affecting zephyr. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Zephyr's Bluetooth Mesh subnet key management leaks one PSA Crypto key slot on every subnet-key teardown. In subsys/bluetooth/mesh/subnet.c, net_keys_create() imports the Private Beacon Key into a PSA key slot under CONFIG_BT_MESH_PRIV_BEACONS (enabled by default), but subnet_keys_destroy() guarded the matching psa_destroy_key() with CONFIG_BT_MESH_V1d1. That Kconfig symbol was removed when explicit Mesh 1.0.1 support was dropped, so the destroy
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 2.4 (Low) |
| Attack vector | Adjacent network |
| Attack complexity | Low |
| Privileges needed | High |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 79%) |
| CISA exploited list | No |
| Weakness | CWE-401 |
| Published | 2026-08-02 |
| Last modified | 2026-10-23 |
Publisher (CNA): Zephyr Project · Vendor: zephyrproject
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
zephyrproject zephyr UPGRADE
Affected: >= 3.6.0 and < 4.5.0
Fixed in: 4.5.0
Safe to downgrade to: a release before 3.6.0
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
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- CVE-2026-2411 MEDIUM 6.5 UPGRADE Zephyr's Bluetooth host declares a GATT characteristic as two consecutive attributes: a Characteristic Declara
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