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Fencer Vulns
high 7.8

CVE-2020-0433 json

In blk_mq_queue_tag_busy_iter of blk-mq-tag.c, there is a possible use after free due to improper locking.

published 2020-09-17 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-1935

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 4%
public exploits
0
none known

Summary

In blk_mq_queue_tag_busy_iter of blk-mq-tag.c, there is a possible use after free due to improper locking. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-151939299

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 4.19.9-1

debian advisories DEBIAN-CVE-2020-0433

  • linux Ubuntu 16.04 LTS 4.4.0-185.215
  • linux Ubuntu 18.04 LTS 4.15.0-101.102
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1110.121
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1067.71
  • linux-gcp Ubuntu 16.04 LTS 4.15.0-1071.81~16.04.1
  • linux-hwe Ubuntu 16.04 LTS 4.15.0-101.102~16.04.1
  • linux-hwe Ubuntu 18.04 LTS 5.0.0-23.24~18.04.1
  • linux-kvm Ubuntu 16.04 LTS 4.4.0-1076.83

ubuntu advisories UBUNTU-CVE-2020-0433

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-syms SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +6 more 4.12.14-197.89.2
  • kernel-source SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +6 more 4.12.14-197.89.2
  • kernel-default SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +8 more 4.12.14-197.89.2
  • kernel-zfcpdump SLES 15 SP1-LTSS, Manager Server 4.0 4.12.14-197.89.2
  • kernel-obs-build SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +6 more 4.12.14-197.89.2
  • kernel-syms SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +3 more 4.4.180-94.144.1
  • kernel-source SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +3 more 4.4.180-94.144.1
  • kernel-default SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +4 more 4.4.180-94.144.1

suse advisories SUSE-SU-2021:1728-1SUSE-SU-2021:1624-1SUSE-SU-2021:1623-1SUSE-SU-2021:1617-1SUSE-SU-2021:1596-1SUSE-SU-2021:1573-1

Exploit prediction

0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

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.