CVE-2022-28806

Exp

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.

Published: 2022-05-04 Last update: 2025-11-04 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-28806 is rated Exploit Available (56.7/100): CVSS High severity, with low exploitation likelihood (EPSS 0.11%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2022-28806

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2022-28806

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-05-19 0.37% 0.11% -0.26%
2 2025-03-30 0.66% 0.37% -0.29%
3 2025-03-29 — 0.66% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-28806

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2022-28806

Affected software / configurations for CVE-2022-28806

Vendor Product Version Raw CPE
fujitsu lifebook_a3510_firmware < 1.09 cpe:2.3:o:fujitsu:lifebook_a3510_firmware:*:*:*:*:*:*:*:*
fujitsu lifebook_u9310_firmware < 2.17 cpe:2.3:o:fujitsu:lifebook_u9310_firmware:*:*:*:*:*:*:*:*
fujitsu lifebook_u7511_firmware < 2.30 cpe:2.3:o:fujitsu:lifebook_u7511_firmware:*:*:*:*:*:*:*:*
fujitsu lifebook_u7411_firmware < 2.30 cpe:2.3:o:fujitsu:lifebook_u7411_firmware:*:*:*:*:*:*:*:*
fujitsu lifebook_u7311_firmware < 2.30 cpe:2.3:o:fujitsu:lifebook_u7311_firmware:*:*:*:*:*:*:*:*
fujitsu lifebook_u9311_firmware <= 2.33 cpe:2.3:o:fujitsu:lifebook_u9311_firmware:*:*:*:*:*:*:*:*
fujitsu lifebook_e5510_firmware < 2.23 cpe:2.3:o:fujitsu:lifebook_e5510_firmware:*:*:*:*:*:*:*:*
fujitsu lifebook_u7510_firmware < 2.19 cpe:2.3:o:fujitsu:lifebook_u7510_firmware:*:*:*:*:*:*:*:*
fujitsu lifebook_u7410_firmware < 2.19 cpe:2.3:o:fujitsu:lifebook_u7410_firmware:*:*:*:*:*:*:*:*
fujitsu lifebook_u7310_firmware < 2.13 cpe:2.3:o:fujitsu:lifebook_u7310_firmware:*:*:*:*:*:*:*:*
fujitsu lifebook_e459_firmware < 1.09 cpe:2.3:o:fujitsu:lifebook_e459_firmware:*:*:*:*:*:*:*:*
fujitsu lifebook_e449_firmware < 1.09 cpe:2.3:o:fujitsu:lifebook_e449_firmware:*:*:*:*:*:*:*:*

References for CVE-2022-28806

cvelogic Threat Intelligence