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🛡️ CVE-2023-21264 on Ubuntu — linux-allwinner-5.19

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

In multiple functions of mem_protect.c, there is a possible way to access hypervisor memory due to a memory access check in the wrong place. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.

Distribution advisory

This page covers CVE-2023-21264 as tracked by Ubuntu, for the package linux-allwinner-5.19. The fix is available in version 6.2.0-1012.12~22.04.1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs administrative privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: High — administrative rights are needed first.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

UBUNTU-CVE-2023-21264 is recorded against 59 packages.

  • linux-allwinner-5.19
  • linux-aws-5.0
  • linux-aws-5.11
  • linux-aws-5.13
  • linux-aws-5.19
  • linux-aws-5.3
  • linux-aws-5.8
  • linux-aws-6.2 (fixed in 6.2.0-1012.12~22.04.1)
  • linux-azure
  • linux-azure-5.11
  • linux-azure-5.13
  • linux-azure-5.19
  • linux-azure-5.3
  • linux-azure-5.8
  • linux-azure-6.2 (fixed in 6.2.0-1012.12~22.04.1)
  • linux-azure-edge
  • linux-azure-fde-5.19
  • linux-gcp
  • linux-gcp-5.11
  • linux-gcp-5.13
  • linux-gcp-5.19
  • linux-gcp-5.3
  • linux-gcp-5.8
  • linux-gcp-6.2 (fixed in 6.2.0-1014.14~22.04.1)
Show the remaining 35 packages
  • linux-gke
  • linux-gke-4.15
  • linux-gke-5.15
  • linux-gke-5.4
  • linux-gkeop-5.4
  • linux-hwe
  • linux-hwe-5.11
  • linux-hwe-5.13
  • linux-hwe-5.19
  • linux-hwe-5.8
  • linux-hwe-6.2 (fixed in 6.2.0-33.33~22.04.1)
  • linux-hwe-edge
  • linux-intel-5.13
  • linux-lowlatency-hwe-5.19
  • linux-lowlatency-hwe-6.2 (fixed in 6.2.0-1013.13~22.04.1)
  • linux-nvidia-6.2 (fixed in 6.2.0-1011.11)
  • linux-oem
  • linux-oem-5.10
  • linux-oem-5.13
  • linux-oem-5.14
  • linux-oem-5.17
  • linux-oem-5.6
  • linux-oem-6.0
  • linux-oem-6.1
  • linux-oracle-5.0
  • linux-oracle-5.11
  • linux-oracle-5.13
  • linux-oracle-5.3
  • linux-oracle-5.8
  • linux-raspi2
  • linux-riscv
  • linux-riscv-5.11
  • linux-riscv-5.19
  • linux-riscv-5.8
  • linux-starfive-5.19

Timeline and source

Published on 14 August 2023 and last revised on 4 February 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
source.android.com (Report)
git.kernel.org (Report)
ubuntu.com (Advisory)
ubuntu.com (Advisory)
www.cve.org (Report)

Other advisories for this package

linux-allwinner-5.19 has other advisories on record. If you are patching this one, these are worth checking on the same host:

CVE-2023-21264 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2023-08-14
Updated 2026-08-20
Modified 2026-02-04
Fix URL N/A

Affected Packages

Software From version Fixed in
linux-allwinner-5.19 — —
linux-aws-5.0 — —
linux-aws-5.11 — —
linux-aws-5.13 — —
linux-aws-5.19 — —
linux-aws-5.3 — —
linux-aws-5.8 — —
linux-aws-6.2 — 6.2.0-1012.12~22.04.1
linux-azure — —
linux-azure-5.11 — —
linux-azure-5.13 — —
linux-azure-5.19 — —
linux-azure-5.3 — —
linux-azure-5.8 — —
linux-azure-6.2 — 6.2.0-1012.12~22.04.1
linux-azure-edge — —
linux-azure-fde-5.19 — —
linux-gcp — —
linux-gcp-5.11 — —
linux-gcp-5.13 — —
linux-gcp-5.19 — —
linux-gcp-5.3 — —
linux-gcp-5.8 — —
linux-gcp-6.2 — 6.2.0-1014.14~22.04.1
linux-gke — —
linux-gke-4.15 — —
linux-gke-5.15 — —
linux-gke-5.4 — —
linux-gkeop-5.4 — —
linux-hwe — —
linux-hwe-5.11 — —
linux-hwe-5.13 — —
linux-hwe-5.19 — —
linux-hwe-5.8 — —
linux-hwe-6.2 — 6.2.0-33.33~22.04.1
linux-hwe-edge — —
linux-intel-5.13 — —
linux-lowlatency-hwe-5.19 — —
linux-lowlatency-hwe-6.2 — 6.2.0-1013.13~22.04.1
linux-nvidia-6.2 — 6.2.0-1011.11
linux-oem — —
linux-oem-5.10 — —
linux-oem-5.13 — —
linux-oem-5.14 — —
linux-oem-5.17 — —
linux-oem-5.6 — —
linux-oem-6.0 — —
linux-oem-6.1 — —
linux-oracle-5.0 — —
linux-oracle-5.11 — —
linux-oracle-5.13 — —
linux-oracle-5.3 — —
linux-oracle-5.8 — —
linux-raspi2 — —
linux-riscv — —
linux-riscv-5.11 — —
linux-riscv-5.19 — —
linux-riscv-5.8 — —
linux-starfive-5.19 — —

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