Vulnerability in Linux Kernel
CVE-2021-4148
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (21.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Linux Kernel
- Fedoraproject Fedora — versions 35
- Kernel — versions kernel 5.14.16
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- lkml.org/lkml/2021/9/12/323 (Exploit, Patch, Mailing List, Third Party Advisory)
- lkml.org/lkml/2021/9/17/1037 (Exploit, Patch, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-4148?
- CVE-2021-4148 is a medium-severity vulnerability in Linux Kernel, classified under Improper Validation of Integrity Check Value. CVSS score: 5.5/10. Published 2022-03-23.
- How severe is CVE-2021-4148?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-4148 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.