Certain Arm Cortex and Neoverse processors through 2022-03-08 do not properly restrict cache speculation, aka Spectre-BHB.
Certain Arm Cortex and Neoverse processors through 2022-03-08 do not properly restrict cache speculation, aka Spectre-BHB. An attacker can leverage the shared branch history in the Branch History Buffer (BHB) to influence mispredicted branches. Then, cache allocation can allow the attacker to obtain sensitive information.
- Published
- Mar 13, 2022
- Updated
- Oct 8, 2026
- EPSS
- 0.5% · 41th percentile
- CWE
- —
Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.
Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.6 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| arm | cortex-a57 | cpe:2.3:h:arm:cortex-a57 |
| arm | cortex-a65 | cpe:2.3:h:arm:cortex-a65 |
| arm | cortex-a65ae | cpe:2.3:h:arm:cortex-a65ae |
| arm | cortex-a710 | cpe:2.3:h:arm:cortex-a710 |
| arm | cortex-a72 | cpe:2.3:h:arm:cortex-a72 |
| arm | cortex-a73 | cpe:2.3:h:arm:cortex-a73 |
| arm | cortex-a75 | cpe:2.3:h:arm:cortex-a75 |
| arm | cortex-a76 | cpe:2.3:h:arm:cortex-a76 |
| arm | cortex-a76ae | cpe:2.3:h:arm:cortex-a76ae |
| arm | cortex-a77 | cpe:2.3:h:arm:cortex-a77 |
| arm | cortex-a78 | cpe:2.3:h:arm:cortex-a78 |
| arm | cortex-a78ae | cpe:2.3:h:arm:cortex-a78ae |
and 30 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- arm cortex-a57 firmwareall versions
- arm cortex-a65 firmwareall versions
- arm cortex-a65ae firmwareall versions
- arm cortex-a710 firmwareall versions
- arm cortex-a72 firmwareall versions
- arm cortex-a73 firmwareall versions
- arm cortex-a75 firmwareall versions
- arm cortex-a76 firmwareall versions
- arm cortex-a76ae firmwareall versions
- arm cortex-a77 firmwareall versions
- arm cortex-a78 firmwareall versions
- arm cortex-a78ae firmwareall versions
- arm cortex-r7 firmwareall versions
- arm cortex-r8 firmwareall versions
- arm cortex-x1 firmwareall versions
- arm cortex-x2 firmwareall versions
- arm neoverse n1 firmwareall versions
- arm neoverse n2 firmwareall versions
- arm neoverse-e1 firmwareall versions
- arm neoverse-v1 firmwareall versions
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | bpftool | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-abi-stablelists | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-core | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-cross-headers | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-debug | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-debug-core | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-debug-devel | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-debug-modules | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-debug-modules-extra | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-devel | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-doc | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-headers | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-modules | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-modules-extra | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-tools | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-tools-libs | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-tools-libs-devel | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-zfcpdump | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-zfcpdump-core | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-zfcpdump-devel | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-zfcpdump-modules | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | kernel-zfcpdump-modules-extra | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
| AlmaLinux:8 | perf | before 4.18.0-425.3.1.el8 | 4.18.0-425.3.1.el8 |
+49
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:bpftool | 4.18.0-425.3.1.el8 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel | 4.18.0-425.3.1.el8 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-abi-stablelists | 4.18.0-425.3.1.el8 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-core | 4.18.0-425.3.1.el8 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-cross-headers | 4.18.0-425.3.1.el8 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-debug | 4.18.0-425.3.1.el8 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-debug-core | 4.18.0-425.3.1.el8 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-debug-devel | 4.18.0-425.3.1.el8 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-debug-modules | 4.18.0-425.3.1.el8 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-debug-modules-extra | 4.18.0-425.3.1.el8 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-devel | 4.18.0-425.3.1.el8 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:kernel-doc | 4.18.0-425.3.1.el8 · AlmaLinux:8 | Package registry (OSV) |
| alpine:xen | 4.13.4-r3 · Alpine:v3.12 | Package registry (OSV) |
| debian:arm-trusted-firmware | 2.12.16+dfsg-1 · Debian:14 | Package registry (OSV) |
| debian:linux | 5.16.14-1 · Debian:12 | Package registry (OSV) |
| red hat:bpftool | 0:4.18.0-372.93.1.el8_6 · Red Hat:rhel_eus:8.6::baseos | Package registry (OSV) |
| red hat:bpftool-debuginfo | 0:4.18.0-372.93.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8 | Package registry (OSV) |
| red hat:kernel | 0:4.18.0-372.93.1.el8_6 · Red Hat:rhel_eus:8.6::baseos | Package registry (OSV) |
| red hat:kernel-abi-stablelists | 0:4.18.0-372.93.1.el8_6 · Red Hat:rhel_eus:8.6::baseos | Package registry (OSV) |
| red hat:kernel-debug-debuginfo | 0:4.18.0-372.93.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8 | Package registry (OSV) |
| red hat:kernel-debuginfo | 0:4.18.0-372.93.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8 | Package registry (OSV) |
| red hat:kernel-debuginfo-common-x86_64 | 0:4.18.0-372.93.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8 | Package registry (OSV) |
| red hat:kernel-devel | 0:4.18.0-372.93.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8 | Package registry (OSV) |
| red hat:kernel-tools-debuginfo | 0:4.18.0-372.93.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8 | Package registry (OSV) |
| red hat:perf | 0:4.18.0-372.93.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8 | Package registry (OSV) |
| red hat:perf-debuginfo | 0:4.18.0-372.93.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8 | Package registry (OSV) |
| red hat:python3-perf-debuginfo | 0:4.18.0-372.93.1.el8_6 · Red Hat:rhev_hypervisor:4.4::el8 | Package registry (OSV) |
| rocky linux:kernel | 0:4.18.0-425.3.1.el8 · Rocky Linux:8 | Package registry (OSV) |
| suse:kernel-azure | 4.12.14-16.97.1 · SUSE:Linux Enterprise Server 12 SP5 | Package registry (OSV) |
| suse:kernel-default | 4.12.14-122.116.1 · SUSE:Linux Enterprise High Availability Extension 12 SP5 | Package registry (OSV) |
+7
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-22-0681 · Nov 9, 2022(RedHat Güvenlik Güncellemesi)
- TR-22-0612 · Sep 14, 2022(Microsoft Ürünleri Güvenlik Zafiyeti)
- TR-22-0211 · Mar 9, 2022(Linux Kernel Zafiyeti)
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Local
- Attack complexity
- High
- Privileges required
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
—
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- SSVC exploitation— → none
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- www.openwall.com/lists/oss-security/2022/03/18/2
- developer.arm.com/support/arm-security-updates
- developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability
- lists.debian.org/debian-lts-announce/2022/07/msg00000.html
- www.debian.org/security/2022/dsa-5173
Vendor advisories and official records. Exploit/PoC links are deliberately left out.