Bug 2352567 (CVE-2023-52927)

Summary: CVE-2023-52927 kernel: netfilter: allow exp not to be removed in nf_ct_find_expectation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-03-14 15:01:05 UTC 
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.
Comment 1 Mauro Matteo Cascella 2025-03-14 15:34:22 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025031432-CVE-2023-52927-b600@gregkh/T