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Vulnerability record · CVE-2023-3777 · published 6 September 2023

CVE-2023-3777: Linux kernel use after free vulnerability

Linux · Linux Kernel

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. When nf_tables_delrule() is flushing table rules, it is not checked whether the chain is bound and the chain's owner rule can also release the objects in certain circumstances. We recommend upgrading past commit 6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8.

7.8 CVSS 3.1 High EPSS 0.41% · top 67.3% CWE-416 · Use after free
7.8CVSS 3.1 base score
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. When nf_tables_delrule() is flushing table rules, it is not checked whether the chain is bound and the chain's owner rule can also release the objects in certain circumstances. We recommend upgrading past commit 6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8.

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html Third Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html Third Party AdvisoryVDB Entry
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8 Issue TrackingMailing ListPatchVendor Advisory
https://kernel.dance/6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8 PatchVendor Advisory
https://www.debian.org/security/2023/dsa-5492 Third Party Advisory
http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html Third Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html Third Party AdvisoryVDB Entry
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8 Issue TrackingMailing ListPatchVendor Advisory
https://kernel.dance/6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8 PatchVendor Advisory
https://www.debian.org/security/2023/dsa-5492 Third Party Advisory

Track CVE-2023-3777 inside VULONE

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Source: NIST National Vulnerability Database (record CVE-2023-3777), CISA KEV, FIRST EPSS (scores of 2026-10-08). This page is refreshed as NVD updates the record.