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CVE-2021-20320

Date: February 18, 2022

A flaw was found in s390 eBPF JIT in bpf_jit_insn in arch/s390/net/bpf_jit_comp.c in the Linux kernel. In this flaw, a local attacker with special user privilege can circumvent the verifier and may lead to a confidentiality problem.

Severity Score

Related Resources (8)

https://lore.kernel.org/bpf/20210902185229.1840281-1-johan.almbladh%40anyfinetworks.com/
https://lore.kernel.org/bpf/20210902185229.1840281-1-johan.almbladh@anyfinetworks.com/
https://bugzilla.redhat.com/show_bug.cgi?id=2010090
https://security-tracker.debian.org/tracker/CVE-2021-20320
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-20320
https://nvd.nist.gov/vuln/detail/CVE-2021-20320
https://access.redhat.com/security/cve/CVE-2021-20320
https://www.mend.io/vulnerability-database/CVE-2021-20320

Severity Score

Weakness Type (CWE)

Information Leak / Disclosure

CWE-200

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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