CVE-2023-4569

Kernel: information leak in nft_set_catchall_flush in net/netfilter/nf_tables_api.c

Published Aug 28, 2023 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

Vendor Workaround

Mitigation for this issue is to skip loading the affected module "nftables" onto the system until we have a fix available. This can be done by a blacklist mechanism that will ensure the driver is not loaded at boot time. ~~~ How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278 ~~~

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-5492-1 linux security update
EUVD EUVD EUVD-2023-54424 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.
Ubuntu USN Ubuntu USN USN-6383-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6384-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-6385-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-6386-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6386-2 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-6386-3 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6466-1 Linux kernel (NVIDIA) vulnerabilities
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Feb 27, 2025, 9:03 PM
Reserved
Aug 28, 2023, 7:20 PM
Status
Modified
Published
Aug 28, 2023, 10:15 PM
Modified
Jun 17, 2026, 6:38 AM
Severity
Moderate
Public date
Aug 12, 2023, 12:00 AM