Vulnerability in Arm Cortex-A77
CVE-2023-34320
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (13.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 13.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Arm Cortex-A77
- Arm Cortex-A77 Firmware — versions r0p0, r1p0
- Xen — versions consult Xen advisory XSA-436
Weakness classification (CWE)
Public proof-of-concept exploits
References
- xenbits.xenproject.org/xsa/advisory-436.html (Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-34320?
- CVE-2023-34320 is a medium-severity vulnerability in Arm Cortex-A77, classified under Improper Locking. CVSS score: 5.5/10. Published 2023-12-08.
- How severe is CVE-2023-34320?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2023-34320 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.