CVE-2022-49183 Details
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().
A reference leak vulnerability has been identified in the Linux kernel's net/sched component, specifically within the act_ct functionality. This issue arises when switching zones or network namespaces without clearing the connection tracking (ct) data in between, leading to a leak of the old ct entry reference. The problem occurs because the function tcf_ct_skb_nfct_cached() returns false, allowing tcf_ct_flow_table_lookup() to overwrite the ct entry. The vulnerability affects several different versions and/or ranges of the Linux kernel.
The vulnerability has been fixed in the official Linux Git repository. Users should upgrade to the latest version.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Oct 1, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/4bb42d73def9411e5cad885b9811987d72431df1 | kernel.org | Patch |
| https://git.kernel.org/stable/c/9222a08be539cbb7a8e0d46cbc7ab9e4db273eb8 | kernel.org | |
| https://git.kernel.org/stable/c/b24793a37d91aacad7cb9893b226a7924a89636a | kernel.org | Patch |
| https://git.kernel.org/stable/c/bcb74e132a76ce0502bb33d5b65533a4ed72d159 | kernel.org | Patch |
| https://git.kernel.org/stable/c/bcbf4e5c3b5b373cd61528392dd1ec8e9c0fd33d | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-Other | Weakness Not in a Standard CWE Category | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.10.103, < 5.11 >= 5.15.26, < 5.15.33 >= 5.16.12, <= 5.16.19 >= 5.17, <= 5.17.2 |
CPE
Remediation
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Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 1, 2026 | CVE Modified | kernel.org |
| Oct 1, 2025 | CVE Modified | CISA-ADP |
| Mar 17, 2025 | Initial Analysis | [email protected] |
| Feb 26, 2025 | New CVE Received | kernel.org |