CVE-2021-20320

Description

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.04%
Third-Party Advisory redhat.com
Affected: n/a kernel
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2010090 third party advisory issue tracking
https://lore.kernel.org/bpf/20210902185229.1840281-1-johan.almbladh%40anyfinetworks.com/

Frequently Asked Questions

What is the severity of CVE-2021-20320?
CVE-2021-20320 has been scored as a medium severity vulnerability.
How to fix CVE-2021-20320?
To fix CVE-2021-20320, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-20320 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-20320 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-20320?
CVE-2021-20320 affects n/a kernel.
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