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CVE-2023-4569

18
FAUCET Score

CVE-2023-4569 is a memory leak flaw in the Linux Kernel's nft_set_catchall_flush function, affecting various Debian and Red Hat Linux distributions. A local attacker could exploit this vulnerability to trigger double-deactivations of catchall elements, leading to a memory leak. Rated with a CVSS score of 5.5 (MEDIUM), this vulnerability requires local access and has a high impact on availability, though confidentiality and integrity are not affected. There is currently no evidence of active exploitation, nor are there any public exploit codes available in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, indicating low public attention.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.28%
Probability of exploitation in next 30 days
EPSS Percentile
20.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0028 is in the 77th percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

microsoftpatch availablevia msrc
Product: cbl2 kernel 5.15.131.1-2 on CBL Mariner 2.0Fixed in: 5.15.131.1-2
microsoftpatch availablevia msrc
Product: 18282-16823Fixed in: 5.15.131.1-2
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 5.15.131.1-2
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 5.15.131.1-2
redhatpatch availablevia nvd_reference
View patch

Vendor Advisories (3)

microsoft2023-Sep/CVE-2023-4569

CVE-2023-4569

Sep 12, 2023
redhatCVE-2023-4569Moderate

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

Aug 12, 2023
microsoft2023-Aug/CVE-2023-4569Moderate

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

Aug 8, 2023

References

access.redhat.com / security/cve/CVE-2023-4569
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
patchwork.ozlabs.org / project/netfilter-devel/patch/[email protected]
Mailing ListPatch
debian.org / security/2023/dsa-5492
Third Party Advisory