CVE-2023-6817

Advisory lineage Upstream: 0 Downstream: 39
Modified
Published: 18 Dec 2023, 14:37
Last modified:12 May 2026, 10:41

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

18 Dec 2023, 14:37
Published
Vulnerability first disclosed
12 May 2026, 10:41
Last Modified
Vulnerability information updated

Description

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. The function nft_pipapo_walk did not skip inactive elements during set walk which could lead double deactivations of PIPAPO (Pile Packet Policies) elements, leading to use-after-free. We recommend upgrading past commit 317eb9685095678f2c9f5a8189de698c5354316a.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 6%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • Unknown•Kernel

    ≥ 5.6, < 6.7

  • linux•linux_kernel

    ≥ 5.6, < 5.10.204 | ≥ 5.11, < 5.15.143 | ≥ 5.16, < 6.1.68 | ≥ 6.2, < 6.6.7 | 6.7:rc1 | 6.7:rc2 | 6.7:rc3 | 6.7:rc4

References (8)