CVE-2026-90399 Linux Kernel - Buffer Overflow

Linux kernel contains a buffer overflow caused by stride mismatch in ath12k_wmi_mac_phy_caps_parse() during mac_phy_caps buffer allocation and memcpy, letting attackers cause memory corruption, exploit requires crafted firmware TLVs.

CVSS base score 8.4 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.18% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Denial Of Service, Remote Code Execution
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for ath12k stride mismatch.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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