CVE-2023-4569
Linux Kernel ≤ 6.5
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NSummary
CVE-2023-4569 is a medium-severity Resource Leak (CWE-402) vulnerability in Linux Linux Kernel. Its CVSS base score is 5.5 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Endpoint Denial of Service (T1499); ranked at the 21th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-54424
Vulnerability Data
A memory leak flaw was found in nft_set_catchall_flush in net/netfilter/nf_tables_api.c in the Linux Kernel. This issue may allow a local attacker to cause double-deactivations of catchall elements, which can result in a memory leak.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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- 2 hardening rules · 2 OS baselines
V3.5.8
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Enforcing least-privilege access permissions directly prevents private resources from being exposed outside their intended sphere.
Logical segmentation and unauthorized-access protections stop resources from leaking into untrusted domains.
Secure SDLC practices directly enforce proper memory allocation/deallocation via coding standards, reviews, and tooling.
Encryption of data-at-rest reduces the value of any leaked resource but does not address the transmission flaw itself.
Protecting data-in-transit mitigates exposure during movement yet does not prevent the underlying boundary violation.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Information-access-restriction directly prevents private resources from being exposed beyond intended boundaries.
Access-control mechanisms limit who can receive resources that should remain internal.
Managing access rights helps ensure resources are not granted to untrusted parties.
Data-leakage-prevention technologies specifically block unintended transmission of sensitive resources.
Security testing in development can detect unreleased memory, providing partial coverage of the weakness.
Information-transfer rules can prevent unintended disclosure of private resources outside the product.
Hardening callouts derived
Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (authoritative rows only; rows rated `none` are excluded).
Oracle Linux 8 (1 rule)
- V-248579 OL 8 must restrict access to the kernel message buffer. prevents CWE-402
Oracle Linux 9 (1 rule)
- V-271745 OL 9 must restrict access to the kernel message buffer. prevents CWE-402