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Fencer Vulns
medium 5.5

CVE-2023-34320 json

arm: Guests can trigger a deadlock on Cortex-A77

published 2023-12-08 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-38401

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 14%
public exploits
0
none known

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.

Patch / fix

  • xen Debian 12 4.17.2+76-ge1f9cb16e2-1~deb12u1
  • xen Debian 14, Debian 13 4.17.2-1

debian advisories DEBIAN-CVE-2023-34320

  • xen Alpine 3.15 4.15.4-r3
  • xen Alpine 3.17, Alpine 3.16 4.16.4-r3
  • xen Alpine 3.18 4.17.1-r4
  • xen Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 4.17.1-r5

alpine advisories ALPINE-CVE-2023-34320

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-34320 updated

arm: Guests can trigger a deadlock on Cortex-A77

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Xen Xen

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.