CVE-2023-34320
arm: Guests can trigger a deadlock on Cortex-A77
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2023-34320- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-667
- Updated
- 2026-11-02
CVE List No score
arm: Guests can trigger a deadlock on Cortex-A77
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.
- Record
CVE-2023-34320- Updated
- 2026-11-02
EUVDEUVD-2023-38401 No score
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.
- Record
EUVD-2023-38401- Updated
- 2026-11-02
GitHub AdvisoriesGHSA-75hw-9685-7hff
Cortex-A77 cores (r0p0 and r1p0) are affected by erratum 1508412 where software, under certain...
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.
- Record
GHSA-75hw-9685-7hff- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-667
- Updated
- 2026-11-02
OSVALPINE-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.
- Record
ALPINE-CVE-2023-34320- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSV
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.
- Record
CVE-2023-34320- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-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.
- Record
DEBIAN-CVE-2023-34320- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-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.
- Record
UBUNTU-CVE-2023-34320- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
xenAlpine:v3.15 |
before 4.15.4-r3 | 4.15.4-r3 |
xenAlpine:v3.16 |
before 4.16.4-r3 | 4.16.4-r3 |
xenAlpine:v3.17 |
before 4.16.4-r3 | 4.16.4-r3 |
xenAlpine:v3.18 |
before 4.17.1-r4 | 4.17.1-r4 |
xenAlpine:v3.19 |
before 4.17.1-r5 | 4.17.1-r5 |
xenAlpine:v3.20 |
before 4.17.1-r5 | 4.17.1-r5 |
xenAlpine:v3.21 |
before 4.17.1-r5 | 4.17.1-r5 |
xenAlpine:v3.22 |
before 4.17.1-r5 | 4.17.1-r5 |
xenAlpine:v3.23 |
before 4.17.1-r5 | 4.17.1-r5 |
xenAlpine:v3.24 |
before 4.17.1-r5 | 4.17.1-r5 |
Show 11 moreShow less
| Package | Affected | Fixed |
|---|---|---|
xenDebian:12 |
before 4.17.2+76-ge1f9cb16e2-1~deb12u1, plus listed versions 4.17.1+2-gb773c48e36-14.17.2+55-g0b56bed864-14.17.2-1 |
4.17.2+76-ge1f9cb16e2-1~deb12u1 |
xenDebian:13 |
before 4.17.2-1 | 4.17.2-1 |
xenDebian:14 |
before 4.17.2-1 | 4.17.2-1 |
xenUbuntu:16.04:LTS |
All versions, plus listed versions 4.5.1-0ubuntu14.5.1-0ubuntu24.6.0-1ubuntu14.6.0-1ubuntu24.6.0-1ubuntu4 Show 7 moreShow less4.6.0-1ubuntu4.14.6.0-1ubuntu4.24.6.0-1ubuntu4.34.6.5-0ubuntu14.6.5-0ubuntu1.14.6.5-0ubuntu1.24.6.5-0ubuntu1.4 |
None known |
xenUbuntu:18.04:LTS |
All versions, plus listed versions 4.9.0-0ubuntu34.9.0-0ubuntu44.9.2-0ubuntu1 |
None known |
xenUbuntu:20.04:LTS |
All versions, plus listed versions 4.9.2-0ubuntu24.9.2-0ubuntu64.9.2-0ubuntu74.11.3+24-g14b62ab3e5-1ubuntu14.11.3+24-g14b62ab3e5-1ubuntu24.11.3+24-g14b62ab3e5-1ubuntu2.24.11.3+24-g14b62ab3e5-1ubuntu2.3 |
None known |
xenUbuntu:22.04:LTS |
All versions, plus listed versions 4.11.4+24-gddaaccbbab-1ubuntu24.16.0-1~ubuntu24.16.0-1~ubuntu2.1 |
None known |
xenUbuntu:24.04:LTS |
All versions, plus listed versions 4.17.2-14.17.2+55-g0b56bed864-14.17.2+76-ge1f9cb16e2-14.17.2+76-ge1f9cb16e2-1ubuntu14.17.3+10-g091466ba55-14.17.3+10-g091466ba55-1.1ubuntu24.17.3+10-g091466ba55-1.1ubuntu3 |
None known |
xenUbuntu:25.10 |
All versions, plus listed versions 4.20.0-1ubuntu14.20.0+68-g35cb38b222-1 |
None known |
xenUbuntu:26.10 |
All versions, plus listed versions 4.20.2+7-g1badcf5035-2build24.20.2+37-g61ff35323e-1ubuntu14.20.3+127-gc42374a105-1 |
None known |
xenUbuntu:26.04:LTS |
All versions, plus listed versions 4.20.0+68-g35cb38b222-14.20.2+7-g1badcf5035-24.20.2+7-g1badcf5035-2build2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-34320 is a medium vulnerability (CVSS 5.5) in Arm Cortex-a77 Firmware, published December 8, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.24%, the 14th percentile. Fixed in xen 4.15.4-r3.
References
xenbits.xenproject.org/xsa/advisory-436.html
xenbits.xen.org/xsa/advisory-436.html
nvd.nist.gov/vuln/detail/CVE-2023-34320
github.com/advisories/GHSA-75hw-9685-7hff
security.alpinelinux.org/vuln/CVE-2023-34320
security-tracker.debian.org/tracker/CVE-2023-34320
ubuntu.com/security/CVE-2023-34320
openwall.com/lists/oss-security/2023/08/01/1
cve.org/CVERecord?id=CVE-2023-34320