CVE-2022-25368 [Medium] | Security Vulnerability in Ampere Altra Max Firmware

Spectre BHB is a variant of Spectre-v2 in which malicious code uses the shared branch history (stored in the CPU BHB) to influence mispredicted branches in the victim's hardware context. Speculation caused by these mispredicted branches can then potentially be used to cause cache allocation, which can then be used to infer information that should be protected.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-03-30	0.48%	0.29%	-0.18%
2	2025-03-29	0.29%	0.48%	+0.18%
3	2025-03-25	—	0.29%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-03-30

0.48%

0.29%

-0.18%

2025-03-29

0.29%

0.48%

+0.18%

2025-03-25

—

0.29%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
4.7	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N` 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:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. 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:N) Data isn’t meaningfully altered or forged. Availability (A:N) Service keeps running; no real outage angle.	1.0	3.6	[email protected]
1.9	2.0	LOW	`AV:L/AC:M/Au:N/C:P/I:N/A:N` Click to expand Access vector (AV:L) Requires local access to the target system. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:N) No authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:N) No availability impact.	3.4	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

4.7

3.1

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N 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:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:N): Data isn’t meaningfully altered or forged.
Availability (A:N): Service keeps running; no real outage angle.

1.0

3.6

[email protected]

1.9

2.0

LOW

AV:L/AC:M/Au:N/C:P/I:N/A:N Click to expand

Access vector (AV:L): Requires local access to the target system.
Access complexity (AC:M): Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:N): No availability impact.

3.4

2.9

[email protected]

OS Trackers for CVE-2022-25368

vendor	priority	summary	link
`suse`	medium	CVE-2022-25368 severity moderate: SUSE including 14 source package names (kernel-default, kernel-default-base, …), 242 product×package rows across 55 product lines (HPE Helion OpenStack 8, SUSE CaaS Platform 4.0, … (55 product lines)): Known Not Affected 242.	https://www.suse.com/security/cve/CVE-2022-25368/

Affected software / configurations for CVE-2022-25368

Vendor	Product	Version	Raw CPE
amperecomputing	ampere_altra_max_firmware	—	cpe:2.3:o:amperecomputing:ampere_altra_max_firmware:-:::::::*
amperecomputing	ampere_altra_firmware	—	cpe:2.3:o:amperecomputing:ampere_altra_firmware:-:::::::*
arm	neoverse-e1_firmware	—	cpe:2.3:o:arm:neoverse-e1_firmware:-:::::::*
arm	neoverse-v1_firmware	—	cpe:2.3:o:arm:neoverse-v1_firmware:-:::::::*
arm	cortex-a57_firmware	—	cpe:2.3:o:arm:cortex-a57_firmware:-:::::::*
arm	cortex-a65_firmware	—	cpe:2.3:o:arm:cortex-a65_firmware:-:::::::*
arm	cortex-a65ae_firmware	—	cpe:2.3:o:arm:cortex-a65ae_firmware:-:::::::*
arm	cortex-a72_firmware	—	cpe:2.3:o:arm:cortex-a72_firmware:-:::::::*
arm	cortex-a73_firmware	—	cpe:2.3:o:arm:cortex-a73_firmware:-:::::::*
arm	cortex-a75_firmware	—	cpe:2.3:o:arm:cortex-a75_firmware:-:::::::*
arm	cortex-a76_firmware	—	cpe:2.3:o:arm:cortex-a76_firmware:-:::::::*
arm	cortex-a76ae_firmware	—	cpe:2.3:o:arm:cortex-a76ae_firmware:-:::::::*
arm	cortex-a77_firmware	—	cpe:2.3:o:arm:cortex-a77_firmware:-:::::::*
arm	cortex-a78_firmware	—	cpe:2.3:o:arm:cortex-a78_firmware:-:::::::*
arm	cortex-a78ae_firmware	—	cpe:2.3:o:arm:cortex-a78ae_firmware:-:::::::*
arm	cortex-a78c_firmware	—	cpe:2.3:o:arm:cortex-a78c_firmware:-:::::::*
arm	cortex-x1_firmware	—	cpe:2.3:o:arm:cortex-x1_firmware:-:::::::*
arm	cortex-x2_firmware	—	cpe:2.3:o:arm:cortex-x2_firmware:-:::::::*
arm	cortex-a710_firmware	—	cpe:2.3:o:arm:cortex-a710_firmware:-:::::::*
arm	cortex-a15_firmware	—	cpe:2.3:o:arm:cortex-a15_firmware:-:::::::*
arm	neoverse_n1_firmware	—	cpe:2.3:o:arm:neoverse_n1_firmware:-:::::::*
arm	neoverse_n2_firmware	—	cpe:2.3:o:arm:neoverse_n2_firmware:-:::::::*

References for CVE-2022-25368

URL	Tags
https://amperecomputing.com/products/security-bulletins/impact-of-spectre-bhb-on-ampere.html	Vendor Advisory
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23960	Third Party Advisory VDB Entry
https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/spectre-bhb	Patch Technical Description Vendor Advisory

URL

CVE-2022-25368

Exploit prediction scoring system (EPSS) score for CVE-2022-25368

Common vulnerability scoring system (CVSS) metrics for CVE-2022-25368

Weakness enumeration for CVE-2022-25368

OS Trackers for CVE-2022-25368

Affected software / configurations for CVE-2022-25368

References for CVE-2022-25368