CVE-2023-53619

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Source
https://cve.org/CVERecord?id=CVE-2023-53619
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53619.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2023-53619
Downstream
Related
Published
2025-10-07T15:19:26.003Z
Modified
2026-03-20T12:33:15.610089Z
Summary
netfilter: conntrack: Avoid nf_ct_helper_hash uses after free
Details

In the Linux kernel, the following vulnerability has been resolved:

netfilter: conntrack: Avoid nfcthelper_hash uses after free

If nfconntrackinitstart() fails (for example due to a registernfconntrackbpf() failure), the nfconntrackhelperfini() clean-up path frees the nfcthelperhash map.

When built with NFCONNTRACK=y, further netfilter modules (e.g: netfilterconntrackftp) can still be loaded and call nfconntrackhelpersregister(), independently of whether nfconntrack initialized correctly. This accesses the nfcthelperhash dangling pointer and causes a uaf, possibly leading to random memory corruption.

This patch guards nfconntrackhelperregister() from accessing a freed or uninitialized nfcthelperhash pointer and fixes possible uses-after-free when loading a conntrack module.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53619.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
12f7a505331e6b2754684b509f2ac8f0011ce644
Fixed
4ee69c91cb8f9ca144bc0861969e5a1a3c6152a7
Fixed
00716f25f9697d02a0d9bd622575c7c7321ba3d0
Fixed
61c7a5256543ae7d24cd9d21853d514c8632e1e9
Fixed
8289d422f5e484efe4a565fe18e862ecd621c175
Fixed
6f03ce2f1abcb9f9d0511e3659ca6eb60e39f566
Fixed
05561f822f27b9fa88fa5504ddec34bf38833034
Fixed
fce5cc7cbd4b92f979bf02c9ec5fb69aaeba92d7
Fixed
6eef7a2b933885a17679eb8ed0796ddf0ee5309b

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53619.json"