Information disclosure in Linux Kernel
CVE-2021-20320
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.
Vulnerability class: Information Disclosure
EPSS: 0.003 (17.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Linux Linux_kernel — versions 5.15
- Fedoraproject Fedora — versions 34
- Redhat Enterprise_linux — versions 7.0, 8.0
- N/a Kernel — versions kernel 5.15 rc3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Third Party Advisory, x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-20320?
- CVE-2021-20320 is a medium-severity vulnerability in Linux Kernel, classified under Information Disclosure. CVSS score: 5.5/10. Published 2022-02-18.
- How severe is CVE-2021-20320?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-20320 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.