Medium severity · published Mar 10, 2022
CVE-2022-25368
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…
4.7
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AA
Ampere Altra Firmware · Amperecomputing
All versions, or not specified · source: NVD
AA
Ampere Altra Max Firmware · Amperecomputing
All versions, or not specified · source: NVD
CF
Cortex-a15 Firmware · Arm
All versions, or not specified · source: NVD
CF
Cortex-a57 Firmware · Arm
All versions, or not specified · source: NVD
CF
Cortex-a65 Firmware · Arm
All versions, or not specified · source: NVD
CF
Cortex-a65ae Firmware · Arm
All versions, or not specified · source: NVD
CF
Cortex-a710 Firmware · Arm
All versions, or not specified · source: NVD
CF
Cortex-a72 Firmware · Arm
All versions, or not specified · source: NVD
CF
Cortex-a73 Firmware · Arm
All versions, or not specified · source: NVD
CF
Cortex-a75 Firmware · Arm
All versions, or not specified · source: NVD
CF
Cortex-a76 Firmware · Arm
All versions, or not specified · source: NVD
CF
Cortex-a76ae Firmware · Arm
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-25368
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-25368
Vendor Advisory
https://amperecomputing.com/products/security-bulletins/impact-of-spectre-bhb-on-ampere.html
Third Party Advisory
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23960
Patch
https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/spectre-bhb
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