CVE-2023-3777Use-after-free in Linux kernel's netfilter: nf_tables component
Updated under an hour ago ()
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It affects Linux Kernel and 4 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-416
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- NVD analysis
- Modified
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
Linux Kernel linux:kernel (from the name) | from 5.9 before 6.5 | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 5.9 before 5.10.188; from 5.11 before 5.15.123; from 5.16 before 6.1.42; from 6.2 before 6.4.7 | NVD |
debian debian_linux debian:debian_linux | 12.0 | NVD |
canonical ubuntu_linux canonical:ubuntu_linux | 14.04; 16.04; 18.04; 20.04; 22.04 | NVD |
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8patch, issue-tracking, mailing-list, vendor-advisory
- https://kernel.dance/6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8patch, vendor-advisory
- https://www.debian.org/security/2023/dsa-5492third-party-advisory
- http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.htmlthird-party-advisory, vdb-entry
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.htmlthird-party-advisory, vdb-entry
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.