🛡️ CVE-2021-47195 on Ubuntu — linux-allwinner-5.19

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

Description

In the Linux kernel, the following vulnerability has been resolved: spi: fix use-after-free of the add_lock mutex Commit 6098475d4cb4 ("spi: Fix deadlock when adding SPI controllers on SPI buses") introduced a per-controller mutex. But mutex_unlock() of said lock is called after the controller is already freed: spi_unregister_controller(ctlr) -> put_device(&ctlr->dev) -> spi_controller_release(dev) -> mutex_unlock(&ctrl->add_lock) Move the put_device() after the mutex_unlock().

Distribution advisory

This page covers CVE-2021-47195 as tracked by Ubuntu, for the package linux-allwinner-5.19. No fixed version has been recorded for this distribution yet.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

UBUNTU-CVE-2021-47195 is recorded against 69 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
  • linux-azure
  • linux-azure-5.11
  • linux-azure-5.13
  • linux-azure-5.19
  • linux-azure-5.3
  • linux-azure-5.8
  • linux-azure-6.11
  • linux-azure-6.2
  • linux-azure-edge
  • linux-azure-fde
  • linux-azure-fde-5.19
  • linux-azure-fde-6.2
  • linux-gcp
  • linux-gcp-5.11
  • linux-gcp-5.13
  • linux-gcp-5.19
Show the remaining 45 packages
  • linux-gcp-5.3
  • linux-gcp-5.8
  • linux-gcp-6.11
  • linux-gcp-6.2
  • 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-6.11
  • linux-hwe-6.2
  • linux-hwe-edge
  • linux-intel-5.13
  • linux-intel-iot-realtime
  • linux-lowlatency-hwe-5.19
  • linux-lowlatency-hwe-6.11
  • linux-lowlatency-hwe-6.2
  • linux-nvidia-6.2
  • 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-raspi-realtime
  • linux-raspi2
  • linux-realtime
  • linux-riscv
  • linux-riscv-5.11
  • linux-riscv-5.19
  • linux-riscv-5.8
  • linux-starfive-5.19
  • linux-starfive-6.2

Timeline and source

Published on 10 April 2024 and last revised on 24 October 2025. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
git.kernel.org (Report)
git.kernel.org (Report)
git.kernel.org (Report)
www.cve.org (Report)

CVE-2021-47195 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:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2024-04-10
Updated 2026-06-02
Modified 2025-10-24
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 — —
linux-azure — —
linux-azure-5.11 — —
linux-azure-5.13 — —
linux-azure-5.19 — —
linux-azure-5.3 — —
linux-azure-5.8 — —
linux-azure-6.11 — —
linux-azure-6.2 — —
linux-azure-edge — —
linux-azure-fde — —
linux-azure-fde-5.19 — —
linux-azure-fde-6.2 — —
linux-gcp — —
linux-gcp-5.11 — —
linux-gcp-5.13 — —
linux-gcp-5.19 — —
linux-gcp-5.3 — —
linux-gcp-5.8 — —
linux-gcp-6.11 — —
linux-gcp-6.2 — —
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-6.11 — —
linux-hwe-6.2 — —
linux-hwe-edge — —
linux-intel-5.13 — —
linux-intel-iot-realtime — —
linux-lowlatency-hwe-5.19 — —
linux-lowlatency-hwe-6.11 — —
linux-lowlatency-hwe-6.2 — —
linux-nvidia-6.2 — —
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-raspi-realtime — —
linux-raspi2 — —
linux-realtime — —
linux-riscv — —
linux-riscv-5.11 — —
linux-riscv-5.19 — —
linux-riscv-5.8 — —
linux-starfive-5.19 — —
linux-starfive-6.2 — —

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