title: Incorrect Verifier Branch Pruning Logic Leads To Arbitrary Read/Write In Linux Kernel and Lateral Privilege Escalation
description: Incorrect verifier pruning in BPF in Linux Kernel >=5.4 leads to unsafe
code paths being incorrectly marked as safe, resulting in arbitrary read/write in
kernel memory, lateral privilege escalation, and container escape.
problem types: CWE-682 Incorrect Calculation
affected:
{
defaultStatus: unaffected
product: Linux Kernel
vendor: Linux
versions:
lessThan: 5.4, status: unaffected, version: -, versionType: custom
lessThan: 71b547f561247897a0a14f3082730156c0533fed, status: affected, version: -, versionType: git
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 10
baseSeverity: CRITICAL
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
version: 3.1
]
format: CVSS
scenarios: GENERAL