CVE-2021-28964

Aliases:UBUNTU-CVE-2021-28964DEBIAN-CVE-2021-28964
Advisory lineage Upstream: 0 Downstream: 27
Modified
Published: 22 Mar 2021, 07:17
Last modified:03 Aug 2024, 21:55

Vulnerability Summary

Overall Risk (default)
low
19/100
CVSS Score
4.7 MEDIUM
v3.1 (nvd)
EPSS Score
0.27% LOW
0% probability +0.18%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

22 Mar 2021, 07:17
Published
Vulnerability first disclosed
03 Aug 2024, 21:55
Last Modified
Vulnerability information updated

Description

A race condition was discovered in get_old_root in fs/btrfs/ctree.c in the Linux kernel through 5.11.8. It allows attackers to cause a denial of service (BUG) because of a lack of locking on an extent buffer before a cloning operation, aka CID-dbcc7d57bffc.

CVSS Metrics

  • v3.1•MEDIUM•Score: 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
  • v2.0•LOW•Score: 1.9AV:L/AC:M/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 0.27%• Percentile: 19%

Techniques & Countermeasures

  • CWE-362•Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

    The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Affected Systems

  • debian•linux

    < 5.10.26-1 | < 5.10.26-1 | < 5.10.26-1 | < 5.10.26-1

  • ubuntu•linux

    all | < 4.4.0-223.256 | < 4.15.0-144.148 | < 5.4.0-74.83

  • ubuntu•linux-aws

    < 4.4.0-1103.108 | < 4.4.0-1139.153 | < 4.15.0-1103.110 | < 5.4.0-1049.51

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1049.51~18.04.1

  • ubuntu•linux-aws-fips

    < 4.15.0-2045.47 | all | < 5.4.0-1069.73+fips2

  • ubuntu•linux-aws-hwe

    < 4.15.0-1103.110~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1115.128~14.04.1 | < 4.15.0-1115.128~16.04.1 | all | < 5.4.0-1048.50

  • ubuntu•linux-azure-4.15

    < 4.15.0-1115.128

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1048.50~18.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2027.30 | all | < 5.4.0-1073.76+fips1

  • ubuntu•linux-bluefield

    all | < 5.4.0-1012.15

  • ubuntu•linux-dell300x

    < 4.15.0-1022.26

  • ubuntu•linux-fips

    < 4.4.0-1073.79 | all | < 4.15.0-1060.68

  • ubuntu•linux-gcp

    < 4.15.0-1100.113~16.04.1 | all | < 5.4.0-1044.47

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1100.113

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1044.47~18.04.2

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gcp-fips

    all | < 5.4.0-1067.71~20.04.1

  • ubuntu•linux-gke

    < 5.4.0-1044.46

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-gke-5.4

    < 5.4.0-1044.46~18.04.1

  • ubuntu•linux-gkeop

    < 5.4.0-1016.17

  • ubuntu•linux-gkeop-5.4

    < 5.4.0-1016.17~18.04.1

  • ubuntu•linux-hwe

    < 4.15.0-144.148~16.04.1 | all

  • ubuntu•linux-hwe-5.4

    < 5.4.0-74.83~18.04.1

  • ubuntu•linux-hwe-5.8

    < 5.8.0-55.62~20.04.1

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.4.0-1104.113 | < 4.15.0-1092.94 | < 5.4.0-1040.41

  • ubuntu•linux-lts-xenial

    < 4.4.0-223.256~14.04.1

  • ubuntu•linux-oem

    all

  • ubuntu•linux-oem-5.10

    < 5.10.0-1025.26

  • ubuntu•linux-oem-5.6

    all

  • ubuntu•linux-oracle

    < 4.15.0-1072.80~16.04.1 | < 4.15.0-1072.80 | < 5.4.0-1046.50

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.3

    all

  • ubuntu•linux-oracle-5.4

    < 5.4.0-1046.50~18.04.2

  • ubuntu•linux-raspi

    < 5.4.0-1036.39

  • ubuntu•linux-raspi-5.4

    < 5.4.0-1036.39~18.04.1

  • ubuntu•linux-raspi-realtime

    all

  • ubuntu•linux-raspi2

    < 4.15.0-1086.91 | all

  • ubuntu•linux-realtime

    all

  • ubuntu•linux-riscv

    all

  • ubuntu•linux-riscv-5.8

    < 5.8.0-26.28~20.04.1

  • ubuntu•linux-snapdragon

    < 4.15.0-1103.112

Showing first 50 affected entries in server-rendered view.

References (16)