CVE-2022-49183: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_ct: fix ref leak when switching zones When switching zones or network namespaces without doing a ct clear in between, it is now leaking a reference to the old ct entry. That's because tcf_ct_skb_nfct_cached() returns false and tcf_ct_flow_table_lookup() may simply overwrite it. The fix is to, as the ct entry is not reusable, free it already at tcf_ct_skb_nfct_cached().

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.10.103 — 5.11
linux	linux_kernel	5.15.26 — 5.15.33
linux	linux_kernel	5.16.12 — 5.16.19
linux	linux_kernel	5.17 — 5.17.2

References

Advisories & Patches

https://git.kernel.org/stable/c/4bb42d73def9411e5cad885b9811987d72431df1 https://git.kernel.org/stable/c/b24793a37d91aacad7cb9893b226a7924a89636a https://git.kernel.org/stable/c/bcb74e132a76ce0502bb33d5b65533a4ed72d159 https://git.kernel.org/stable/c/bcbf4e5c3b5b373cd61528392dd1ec8e9c0fd33d

Frequently Asked Questions

What is CVE-2022-49183? +

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_ct: fix ref leak when switching zones When switching zones or network namespaces without doing a ct clear in between, it is now leaking a reference to the old ct entry. That's because tcf_ct_skb_nfct_cached() returns false and tcf_ct_flow_table_lookup() may simply overwrite it. The fix is to, as the ct entry is not reusable, free it already at tcf_ct_skb_nfct_cached(). It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49183? +

CVE-2022-49183 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2022-49183? +

CVE-2022-49183 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2022-49183? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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