CVE-2023-4244

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.Due to a race condition between nf_tables netlink control plane transaction and nft_set element garbage collection, it is possible to underflow the reference counter causing a use-after-free vulnerability.We recommend upgrading past commit 3e91b0ebd994635df2346353322ac51ce84ce6d8.

CVSS v3.1

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

CVSS v3.1

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

EPSS

0.23% chance of exploitation in the next 30 days, 13th percentile

Published

2023-09-06

Updated

2026-07-28

Proof-of-concept exploits (1)

• letsr00t/nft-catchall-uaf

References

• CVE Record
• NVD entry

Related

• CVE-2019-13272
• CVE-2019-18634
• CVE-2021-22555
• CVE-2022-0847
• CVE-2022-2639
• CVE-2023-0386