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Fencer Vulns
medium 4.6

CVE-2022-20008 json

In mmc_blk_read_single of block.c, there is a possible way to read kernel heap memory due to uninitialized data.

published 2022-05-10 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-25268

cvss
4.6
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

In mmc_blk_read_single of block.c, there is a possible way to read kernel heap memory due to uninitialized data. This could lead to local information disclosure if reading from an SD card that triggers errors, with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-216481035References: Upstream kernel

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 5.16.11-1

debian advisories DEBIAN-CVE-2022-20008

  • linux Ubuntu 20.04 LTS 5.4.0-110.124
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1073.78
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1073.78
  • linux-gke Ubuntu 20.04 LTS 5.4.0-1071.76
  • linux-ibm Ubuntu 20.04 LTS 5.4.0-1021.23
  • linux-iot Ubuntu 20.04 LTS 5.4.0-1004.6
  • linux-kvm Ubuntu 20.04 LTS 5.4.0-1063.66
  • linux-azure Ubuntu 20.04 LTS 5.4.0-1078.81

ubuntu advisories UBUNTU-CVE-2022-20008

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-rt SLE Real Time 12 SP5 4.12.14-10.103.1
  • kernel-syms-rt SLE Real Time 12 SP5 4.12.14-10.103.1
  • kernel-rt_debug SLE Real Time 12 SP5 4.12.14-10.103.1
  • kernel-source-rt SLE Real Time 12 SP5 4.12.14-10.103.1
  • dtb-aarch64 openSUSE Leap 15.4, openSUSE Leap 15.3 5.3.18-150300.59.98.1
  • kernel-64kb SLE Module for Basesystem 15 SP3, openSUSE Leap 15.3 5.3.18-150300.59.98.1
  • kernel-syms SLE Module for Development Tools 15 SP3, openSUSE Leap 15.3 5.3.18-150300.59.98.1
  • kernel-obs-qa openSUSE Leap 15.3 5.3.18-150300.59.98.1

suse advisories SUSE-SU-2022:3810-1SUSE-SU-2022:3775-1SUSE-SU-2022:3704-1SUSE-SU-2022:3693-1SUSE-SU-2022:3587-1SUSE-SU-2022:3584-1

  • kernel-rt openSUSE Leap Micro 5.2 5.3.18-150300.93.1

opensuse advisories openSUSE-SU-2022:2177-1

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 4.6 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:P/I:N/A:N

Affected products

  • n/a Android

Classification

Weakness
  • CWE-908 Use of Uninitialized Resource

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.