🛡️ CVE-2022-28806
🟠 CVSS 7.8 — High ⚠️ Exploit Public CWE-787 NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

An issue was discovered on certain Fujitsu LIEFBOOK devices (A3510, U9310, U7511/U7411/U7311, U9311, E5510/E5410, U7510/U7410/U7310, E459/E449) with BIOS versions before v1.09 (A3510), v2.17 (U9310), v2.30 (U7511/U7411/U7311), v2.33 (U9311), v2.23 (E5510), v2.19 (U7510/U7410), v2.13 (U7310), and v1.09 (E459/E449). The FjGabiFlashCoreAbstractionSmm driver registers a Software System Management Interrupt (SWSMI) handler that is not sufficiently validated to ensure that the CommBuffer (or any other communication buffer's nested contents) are not pointing to SMRAM contents. A potential attacker can therefore write fixed data to SMRAM, which could lead to data corruption inside this memory (e.g., change the SMI handler's code or modify SMRAM map structures to break input pointer validation for other SMI handlers). Thus, the attacker could elevate privileges from ring 0 to ring -2 and execute arbitrary code in SMM.

Details

Severity HIGH
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-787
Public Exploit ⚠️ Yes
Source NVD
Published 2022-05-04
Updated 2026-06-08
Modified 2025-11-04
Fix URL N/A

Affected Packages

Software From version Fixed in
lifebook-a3510-firmware 1.09
lifebook-e449-firmware 1.09
lifebook-e459-firmware 1.09
lifebook-e5510-firmware 2.23
lifebook-u7310-firmware 2.13
lifebook-u7311-firmware 2.30
lifebook-u7410-firmware 2.19
lifebook-u7411-firmware 2.30
lifebook-u7510-firmware 2.19
lifebook-u7511-firmware 2.30
lifebook-u9310-firmware 2.17
lifebook-u9311-firmware 2.33

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