CVE-2023-53619

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-10-07. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

October 7, 2025

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

netfilter: conntrack: Avoid nf_ct_helper_hash uses after free - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fce5cc7cbd4b92f979bf02c9ec5fb69aaeba92d7
generic

netfilter: conntrack: Avoid nf_ct_helper_hash uses after free - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8289d422f5e484efe4a565fe18e862ecd621c175
generic

netfilter: conntrack: Avoid nf_ct_helper_hash uses after free - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6f03ce2f1abcb9f9d0511e3659ca6eb60e39f566
generic

netfilter: conntrack: Avoid nf_ct_helper_hash uses after free - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6eef7a2b933885a17679eb8ed0796ddf0ee5309b
generic

netfilter: conntrack: Avoid nf_ct_helper_hash uses after free - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/61c7a5256543ae7d24cd9d21853d514c8632e1e9
generic

netfilter: conntrack: Avoid nf_ct_helper_hash uses after free - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4ee69c91cb8f9ca144bc0861969e5a1a3c6152a7
generic

netfilter: conntrack: Avoid nf_ct_helper_hash uses after free - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/05561f822f27b9fa88fa5504ddec34bf38833034
generic

netfilter: conntrack: Avoid nf_ct_helper_hash uses after free - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/00716f25f9697d02a0d9bd622575c7c7321ba3d0

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 4.14.322—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 109 total refreshes for this CVE.

  1. 2026-08-05 19:15 UTCEPSS rescore
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  3. 2026-08-05 10:17 UTCEG score recompute
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Frequently asked(5)

What is CVE-2023-53619?
CVE-2023-53619 is a high vulnerability published on October 7, 2025. In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: Avoid nfcthelper_hash uses after free If nfconntrackinit_start() fails (for example due to a registernfconntrackbpf() failure), the nfconntrackhelperfini() clean-up path frees the nfcthelper_hash map. When…
When was CVE-2023-53619 disclosed?
CVE-2023-53619 was first published in the National Vulnerability Database on October 7, 2025, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-53619 actively exploited?
CVE-2023-53619 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 89.7% of all scored CVEs.
What is the CVSS score of CVE-2023-53619?
CVE-2023-53619 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2023-53619?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-53619, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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