What’s Vulnerable › Vulnerabilities

CVE-2021-4148

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-03-23 · updated 2026-06-17
• Weakness: CWE-354

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.

Affected products

• Fedoraproject Fedora: 35
• Linux kernel: before 5.14.16 — fixed in 5.14.16

How to fix

Upgrade to a fixed version: Linux kernel 5.14.16. Check the vendor advisory for mitigations.

References

• 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://bugzilla.redhat.com/show_bug.cgi?id=2026487
• https://lkml.org/lkml/2021/9/12/323
• https://lkml.org/lkml/2021/9/17/1037

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