CVE-2023-52927: netfilter: allow exp not to be removed in nf_ct_find_expectation
First published: Fri Mar 14 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: netfilter: allow exp not to be removed in nf_ct_find_expectation Currently nf_conntrack_in() calling nf_ct_find_expectation() will remove the exp from the hash table. However, in some scenario, we expect the exp not to be removed when the created ct will not be confirmed, like in OVS and TC conntrack in the following patches. This patch allows exp not to be removed by setting IPS_CONFIRMED in the status of the tmpl.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux kernel | ||
| debian/linux | <=5.10.223-1<=5.10.234-1<=6.1.129-1 | 6.1.135-1 6.12.25-1 6.12.27-1 |
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Reference Links
- https://git.kernel.org/stable/c/3fa58a6fbd1e9e5682d09cdafb08fba004cb12ec
- https://git.kernel.org/stable/c/4914109a8e1e494c6aa9852f9e84ec77a5fc643f
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-52927
- https://nvd.nist.gov/vuln/detail/CVE-2023-52927
- https://launchpad.net/bugs/cve/CVE-2023-52927
- https://security-tracker.debian.org/tracker/CVE-2023-52927
- https://ubuntu.com/security/CVE-2023-52927
- https://git.kernel.org/linus/4914109a8e1e494c6aa9852f9e84ec77a5fc643f
Frequently Asked Questions
What is the severity of CVE-2023-52927?
CVE-2023-52927 is considered a high-severity vulnerability due to its potential impact on the Linux kernel's connection tracking functionality.
How do I fix CVE-2023-52927?
To fix CVE-2023-52927, upgrade your Linux kernel to the latest version that includes the security patch for this vulnerability.
What impact does CVE-2023-52927 have on system security?
CVE-2023-52927 could lead to unexpected behavior in packet filtering and connection tracking, potentially allowing unauthorized access.
Which versions of the Linux kernel are affected by CVE-2023-52927?
CVE-2023-52927 affects multiple versions of the Linux kernel prior to the application of available patches.
Is there a public exploit available for CVE-2023-52927?
As of now, there are no public exploits confirmed for CVE-2023-52927, but due diligence is advised.
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