Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.15 |
| Fedoraproject | Fedora | 34 |
| Redhat | Enterprise Linux | 7.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2010090Issue TrackingThird Party Advisory
- https://lore.kernel.org/bpf/20210902185229.1840281-1-johan.almbladh%40anyfinetwo
- https://bugzilla.redhat.com/show_bug.cgi?id=2010090Issue TrackingThird Party Advisory
- https://lore.kernel.org/bpf/20210902185229.1840281-1-johan.almbladh%40anyfinetwo
FAQ
What is CVE-2021-20320?
CVE-2021-20320 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 le...
How severe is CVE-2021-20320?
CVE-2021-20320 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-20320?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Fedoraproject Fedora, Redhat Enterprise Linux.