arm: Guests can trigger a deadlock on Cortex-A77
Priority LOW 24CWE-667Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-667 and the CVSS impact.
Summary
Cortex-A77 cores (r0p0 and r1p0) are affected by erratum 1508412 where software, under certain circumstances, could deadlock a core due to the execution of either a load to device or non-cacheable memory, and either a store exclusive or register read of the Physical Address Register (PAR_EL1) in close proximity.
Why it matters now
EPSS 0.00237 14th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Xen | Xen | — | — | No fix listed | CNA |
- Xen VendorXen Affected — Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:arm:cortex-a77_firmware:r0p0:*:*:*:*:*:*:* | r0p0 | Vulnerable | Arm |
| cpe:2.3:o:arm:cortex-a77_firmware:r1p0:*:*:*:*:*:*:* | r1p0 | Vulnerable | Arm |
| cpe:2.3:h:arm:cortex-a77:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Arm |
| cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* | all versions | Vulnerable | Xen |
- cpe:2.3:o:arm:cortex-a77_firmware:r0p0:*:*:*:*:*:*:* Versions r0p0 Vulnerable ·Arm
- cpe:2.3:o:arm:cortex-a77_firmware:r1p0:*:*:*:*:*:*:* Versions r1p0 Vulnerable ·Arm
- cpe:2.3:h:arm:cortex-a77:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Arm
- cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Xen
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2023-34320
- 2026-10-03 Alias added: GHSA-75hw-9685-7hff
References
More Xen vulnerabilities
- TI-2012-00210 The x86-64 kernel system-call functionality in Xen 4.1.2 and earlier, as used in Citrix… CVSS 2.0HIGH 7.2
- TI-2023-07042 Information disclosure through error messages in AMD Ryzen™ 3000 Series Desktop… CVSS 3.1MEDIUM 5.5
- TI-2015-04333 The C+ mode offload emulation in the RTL8139 network card device model in QEMU, as used… CVSS 2.0HIGH 9.3
- TI-2015-06741 The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows… CVSS 3.1CRITICAL 10.0
- TI-2018-06436 A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures… CVSS 3.0HIGH 7.8
- TI-2024-20522 x86: Incorrect logic for BTC/SRSO mitigations CVSS 3.1HIGH 7.5
Sources
- CVE-2023-34320 · CVE Program
- CVE-2023-34320 · NVD
- FIRST EPSS
- GHSA-75hw-9685-7hff · GitHub Advisory Database · CC BY 4.0
- CVE-2023-34320 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences