Vulnerability DatabaseCVE-2021-0448
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CVE-2021-0448
Published:May 14, 2026
Updated:May 14, 2026
A security vulnerability was found in Linux Kernel before 4.4.239, 4.9.239, 4.14.201, 4.19.150, 5.4.70, and 5.8.13. Missing range check for l3/l4 protonum in netfilter.c
Affected Packages
linux-yocto (YOCTO):
Affected version(s) =4.9.3+gitAUTOINC+03a2d3f7f9_881cba95ae <4.10+gitAUTOINC+805ea440c7_b259a5d744
Fix Suggestion:
Update to version 4.10+gitAUTOINC+805ea440c7_b259a5d744
linux-yocto (YOCTO):
Affected version(s) >=4.8 <4.8.26+gitAUTOINC+1c60e003c7_27efc3ba68
Fix Suggestion:
Update to version 4.8.26+gitAUTOINC+1c60e003c7_27efc3ba68
linux-libc-headers (YOCTO):
Affected version(s) >=5.4 <5.10
Fix Suggestion:
Update to version 5.10
Related Resources (2)
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-0448
https://github.com/gregkh/linux/commit/1cc5ef91d2ff94d2bf2de3b3585423e8a1051cb6
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CVSS v4
Base Score:
6.9
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.1
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
HIGH