In the Linux kernel, the following vulnerability has been resolved:
netfilter: conntrack: Avoid nf_ct_helper_hash uses after free
If nf_conntrack_init_start() fails (for example due to a
register_nf_conntrack_bpf() failure), the nf_conntrack_helper_fini()
clean-up path frees the nf_ct_helper_hash map.
When built with NF_CONNTRACK=y, further netfilter modules (e.g:
netfilter_conntrack_ftp) can still be loaded and call
nf_conntrack_helpers_register(), independently of whether nf_conntrack
initialized correctly. This accesses the nf_ct_helper_hash dangling
pointer and causes a uaf, possibly leading to random memory corruption.
This patch guards nf_conntrack_helper_register() from accessing a freed
or uninitialized nf_ct_helper_hash pointer and fixes possible
uses-after-free when loading a conntrack module.
References
Configurations
Configuration 1 (hide)
|
History
05 Feb 2026, 14:54
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:* |
|
| CWE | CWE-416 | |
| First Time |
Linux
Linux linux Kernel |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| References | () https://git.kernel.org/stable/c/00716f25f9697d02a0d9bd622575c7c7321ba3d0 - Patch | |
| References | () https://git.kernel.org/stable/c/05561f822f27b9fa88fa5504ddec34bf38833034 - Patch | |
| References | () https://git.kernel.org/stable/c/4ee69c91cb8f9ca144bc0861969e5a1a3c6152a7 - Patch | |
| References | () https://git.kernel.org/stable/c/61c7a5256543ae7d24cd9d21853d514c8632e1e9 - Patch | |
| References | () https://git.kernel.org/stable/c/6eef7a2b933885a17679eb8ed0796ddf0ee5309b - Patch | |
| References | () https://git.kernel.org/stable/c/6f03ce2f1abcb9f9d0511e3659ca6eb60e39f566 - Patch | |
| References | () https://git.kernel.org/stable/c/8289d422f5e484efe4a565fe18e862ecd621c175 - Patch | |
| References | () https://git.kernel.org/stable/c/fce5cc7cbd4b92f979bf02c9ec5fb69aaeba92d7 - Patch |
07 Oct 2025, 16:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-10-07 16:15
Updated : 2026-02-05 14:54
NVD link : CVE-2023-53619
Mitre link : CVE-2023-53619
CVE.ORG link : CVE-2023-53619
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-416
Use After Free