Vulnerability Details : CVE-2021-4148
Potential exploit
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.
Vulnerability category: Denial of service
Products affected by CVE-2021-4148
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-4148
0.01%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 1 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-4148
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2021-4148
-
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.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2021-4148
-
https://bugzilla.redhat.com/show_bug.cgi?id=2026487
2026487 – (CVE-2021-4148) CVE-2021-4148 kernel: Improper implementation of block_invalidatepage() allows users to crash the kernelIssue Tracking;Third Party Advisory
-
https://lkml.org/lkml/2021/9/17/1037
LKML: Yang Shi: [PATCH] fs: buffer: check huge page size instead of single page for invalidatepageExploit;Mailing List;Patch;Third Party Advisory
-
https://lkml.org/lkml/2021/9/12/323
LKML: Hao Sun: general protection fault in wb_timer_fnExploit;Mailing List;Patch;Third Party Advisory
Jump to