CVE-2021-4148
Vulnerability Summary
Timeline
Description
A vulnerability was found in the Linux kernel's block_invalidatepage in fs/buffer.c in the filesystem. A missing sanity check may allow a local attacker with user privilege to cause a denial of service (DOS) problem.
CVSS Metrics
- v4.0•MEDIUM•Score: 6.8CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
- v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- v2.0•MEDIUM•Score: 4.9AV:L/AC:L/Au:N/C:N/I:N/A:C
EPSS Trends
Current EPSS score: 0.31%• Percentile: 24%
Techniques & Countermeasures
- CWE-354•Improper Validation of Integrity Check Value
The product does not validate or incorrectly validates the integrity check values or "checksums" of a message. This may prevent it from detecting if the data has been modified or corrupted in transmission.
Affected Systems
- debian•linux
< 5.10.84-1 | < 5.14.16-1 | < 5.14.16-1 | < 5.14.16-1
- ubuntu•linux
all
- ubuntu•linux-allwinner-5.19
all
- ubuntu•linux-aws
all
- ubuntu•linux-aws-5.0
all
- ubuntu•linux-aws-5.11
all
- ubuntu•linux-aws-5.13
< 5.13.0-1012.13~20.04.1
- ubuntu•linux-aws-5.3
all
- ubuntu•linux-aws-5.4
all
- ubuntu•linux-aws-5.8
all
- ubuntu•linux-aws-fips
all
- ubuntu•linux-azure
all | all
- ubuntu•linux-azure-5.11
all
- ubuntu•linux-azure-5.13
< 5.13.0-1013.15~20.04.1
- ubuntu•linux-azure-5.3
all
- ubuntu•linux-azure-5.4
all
- ubuntu•linux-azure-5.8
all
- ubuntu•linux-azure-edge
all
- ubuntu•linux-azure-fde
all
- ubuntu•linux-azure-fips
all
- ubuntu•linux-bluefield
all | all
- ubuntu•linux-fips
all
- ubuntu•linux-gcp
all | all
- ubuntu•linux-gcp-5.11
all
- ubuntu•linux-gcp-5.13
< 5.13.0-1013.16~20.04.1
- ubuntu•linux-gcp-5.3
all
- ubuntu•linux-gcp-5.4
all
- ubuntu•linux-gcp-5.8
all
- ubuntu•linux-gcp-fips
all
- ubuntu•linux-gke
all
- ubuntu•linux-gke-4.15
all
- ubuntu•linux-gke-5.4
all
- ubuntu•linux-gkeop
all
- ubuntu•linux-gkeop-5.4
all
- ubuntu•linux-hwe
all
- ubuntu•linux-hwe-5.11
all
- ubuntu•linux-hwe-5.13
< 5.13.0-28.31~20.04.1
- ubuntu•linux-hwe-5.15
all
- ubuntu•linux-hwe-5.19
all
- ubuntu•linux-hwe-5.4
all
- ubuntu•linux-hwe-5.8
all
- ubuntu•linux-hwe-edge
all
- ubuntu•linux-ibm
all
- ubuntu•linux-ibm-5.4
all
- ubuntu•linux-intel-5.13
all
- ubuntu•linux-intel-iot-realtime
all
- ubuntu•linux-intel-iotg
all
- ubuntu•linux-intel-iotg-5.15
all
- ubuntu•linux-iot
all
- ubuntu•linux-kvm
all
Showing first 50 affected entries in server-rendered view.
References (9)
- https://bugzilla.redhat.com/show_bug.cgi?id=2026487
- https://lkml.org/lkml/2021/9/12/323
- https://lkml.org/lkml/2021/9/17/1037
- https://ubuntu.com/security/CVE-2021-4148
- https://lore.kernel.org/linux-mm/a07564a3-b2fc-9ffe-3ace-3f276075ea5c@google.com/
- https://lore.kernel.org/lkml/CACkBjsYwLYLRmX8GpsDpMthagWOjWWrNxqY6ZLNQVr6yx+f5vA@mail.gmail.com/
- https://lore.kernel.org/lkml/CAHbLzkrdGva2dzO36r62LKv_ip5trbMK0BO3vCeSBk2_7OE-zA@mail.gmail.com/
- https://www.cve.org/CVERecord?id=CVE-2021-4148
- https://security-tracker.debian.org/tracker/CVE-2021-4148