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CVE-2020-36694

Public on 2023-05-21
Modified on 2024-01-12
Description

An issue was discovered in netfilter in the Linux kernel before 5.10. There can be a use-after-free in the packet processing context, because the per-CPU sequence count is mishandled during concurrent iptables rules replacement. This could be exploited with the CAP_NET_ADMIN capability in an unprivileged namespace. NOTE: cc00bca was reverted in 5.12.

Severity
Important
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CVSS v3 Base Score
7.8
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Kernel-5.4 Extra kernel 2022-01-20 19:53 ALAS2KERNEL-5.4-2022-019

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv3 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

Red Hat: CVE-2020-36694 Mitre: CVE-2020-36694 FAQs regarding Amazon Linux ALAS/CVE Severity