5.5

CVE-2023-34320: arm cortex-a77_firmware Improper Locking

CVSS: 5.5v3.1MediumModified
AliasesALPINE-CVE-2023-34320UBUNTU-CVE-2023-34320DEBIAN-CVE-2023-34320
Published 08-12-2023Last modified 04-11-2025
Open JSON

Vulnerability summary

CVE-2023-34320 is a medium (CVSS 5.5) Improper Locking vulnerability in arm cortex-a77_firmware. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 13.7% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 08-12-2023
    PublishedVulnerability first disclosed.
  2. 04-11-2025
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

14%

Versus all other CVEs

30-day change

0.00 pp

From 0.24% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.24%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Alpine1 product
  • xen< 4.15.4-r3 | < 4.16.4-r3 | < 4.17.1-r4 | < 4.17.1-r5
Arm1 product
Debian1 product
  • xen< 4.17.2+76-ge1f9cb16e2-1~deb12u1 | < 4.17.2-1
Ubuntu1 product
  • xenAll versions (No fix recorded)

4 vendors · 4 products

References

8 links