Skip to content
Fencer Vulns
medium 4.4

CVE-2021-39657 json

In ufshcd_eh_device_reset_handler of ufshcd.c, there is a possible out of bounds read due to a missing bounds check.

published 2021-12-15 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26014

cvss
4.4
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 5%
public exploits
0
none known

Summary

In ufshcd_eh_device_reset_handler of ufshcd.c, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-194696049References: Upstream kernel

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 5.10.12-1

debian advisories DEBIAN-CVE-2021-39657

  • linux Ubuntu 16.04 LTS 4.4.0-204.236
  • linux Ubuntu 18.04 LTS 4.15.0-141.145
  • linux Ubuntu 20.04 LTS 5.4.0-67.75
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1123.137
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1098.105
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1039.41
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1097.110~16.04.1
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1038.41

ubuntu advisories UBUNTU-CVE-2021-39657

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-64kb SLE Module for Basesystem 15 SP3 5.3.18-150300.59.60.4
  • kernel-syms SLE Module for Development Tools 15 SP3 5.3.18-150300.59.60.4
  • kernel-source SLE Module for Development Tools 15 SP3, SLE Module for Basesystem 15 SP3 5.3.18-150300.59.60.4
  • kernel-default SLE Workstation Extension 15 SP3, SLE Module for Legacy 15 SP3, SLE Module for Basesystem 15 SP3 +3 more 5.3.18-150300.59.60.4
  • kernel-preempt SLE Workstation Extension 15 SP3, SLE Module for Development Tools 15 SP3, SLE Module for Basesystem 15 SP3 5.3.18-150300.59.60.4
  • kernel-zfcpdump SLE Module for Basesystem 15 SP3 5.3.18-150300.59.60.4
  • kernel-obs-build SLE Module for Development Tools 15 SP3 5.3.18-150300.59.60.4
  • kernel-default-base SLE Module for Basesystem 15 SP3, SLE Micro 5.1 5.3.18-150300.59.60.4.150300.18.37.5

suse advisories SUSE-SU-2022:1039-1SUSE-SU-2022:1037-1SUSE-SU-2022:0555-1SUSE-SU-2022:0544-1SUSE-SU-2022:0543-1SUSE-SU-2022:0477-1

  • dtb-aarch64 openSUSE Leap 15.3 5.3.18-150300.59.60.4
  • kernel-64kb openSUSE Leap 15.3 5.3.18-150300.59.60.4
  • kernel-syms openSUSE Leap 15.3 5.3.18-150300.59.60.4
  • kernel-obs-qa openSUSE Leap 15.3 5.3.18-150300.59.60.4
  • kernel-source openSUSE Leap 15.3 5.3.18-150300.59.60.4
  • kernel-default openSUSE Leap 15.3 5.3.18-150300.59.60.4
  • kernel-preempt openSUSE Leap 15.3 5.3.18-150300.59.60.4
  • kernel-kvmsmall openSUSE Leap 15.3 5.3.18-150300.59.60.4

opensuse advisories openSUSE-SU-2022:1039-1openSUSE-SU-2022:1037-1openSUSE-SU-2022:0370-1openSUSE-SU-2022:0366-1openSUSE-SU-2022:0363-1

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 4.4 CVSS:3.1/AV:L/AC:L/PR:H/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

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.