# CVE-2023-5197: Use-after-free in Linux kernel's netfilter: nf_tables component Status: published. Published: 2023-09-26. Updated: 2026-11-02. A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. Addition and removal of rules from chain bindings within the same transaction causes leads to use-after-free. We recommend upgrading past commit f15f29fd4779be8a418b66e9d52979bb6d6c2325. ## Remediation - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: Google) — https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f15f29fd4779be8a418b66e9d52979bb6d6c2325 - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: ADP: CVE) — https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f15f29fd4779be8a418b66e9d52979bb6d6c2325 - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: cve-coordination@google.com) — https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f15f29fd4779be8a418b66e9d52979bb6d6c2325 - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: cve-coordination@google.com) — https://kernel.dance/f15f29fd4779be8a418b66e9d52979bb6d6c2325 - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: af854a3a-2127-422b-91ae-364da2661108) — https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f15f29fd4779be8a418b66e9d52979bb6d6c2325 - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: af854a3a-2127-422b-91ae-364da2661108) — https://kernel.dance/f15f29fd4779be8a418b66e9d52979bb6d6c2325 ## Affected products and versions - Linux / Kernel (kernel): ≥ 5.9; < 6.6 (affected, custom). Source: CNA: Google - Siemens / SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: ≥ 0; < V1.1 (affected, custom). Source: ADP: siemens-SADP ## NVD configuration conditions Affected CPE matches depend on the following AND/OR and negation conditions: ```json [ { "negate": false, "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.10.198", "versionStartIncluding": "5.9.0", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.15.134", "versionStartIncluding": "5.11", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.1.56", "versionStartIncluding": "5.16", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.5.6", "versionStartIncluding": "6.2", "vulnerable": true } ], "negate": false, "operator": "OR" } ], "operator": "OR" } ] ``` ## Severity and prioritization - CVSS 3.1: 7.8 (high); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: CNA: Google - CVSS 3.1: 6.6 (medium); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H; source: NVD: nvd@nist.gov - CVSS 3.1: 7.8 (high); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: NVD: cve-coordination@google.com - CISA KEV: No listing in collected sources - EPSS: 0.37% as of 2026-11-02; percentile 30.79% - SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP - Weaknesses: CWE-416 ## Exploit evidence No exploit evidence in collected sources. This is not proof of no exploitation. ## References - https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f15f29fd4779be8a418b66e9d52979bb6d6c2325 (CNA: Google; patch) - https://kernel.dance/f15f29fd4779be8a418b66e9d52979bb6d6c2325 (CNA: Google) - http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html (CNA: Google) - https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html (CNA: Google) - https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f15f29fd4779be8a418b66e9d52979bb6d6c2325 (ADP: CVE; patch, x_transferred) - https://kernel.dance/f15f29fd4779be8a418b66e9d52979bb6d6c2325 (ADP: CVE; x_transferred) - http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html (ADP: CVE; x_transferred) - https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html (ADP: CVE; x_transferred) - https://cert-portal.siemens.com/productcert/html/ssa-794697.html (ADP: siemens-SADP) - http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html (cve-coordination@google.com; Third Party Advisory) - https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f15f29fd4779be8a418b66e9d52979bb6d6c2325 (cve-coordination@google.com; Patch) - https://kernel.dance/f15f29fd4779be8a418b66e9d52979bb6d6c2325 (cve-coordination@google.com; Patch, Vendor Advisory) - https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html (cve-coordination@google.com; Mailing List, Third Party Advisory) - http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html (af854a3a-2127-422b-91ae-364da2661108; Third Party Advisory) - https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f15f29fd4779be8a418b66e9d52979bb6d6c2325 (af854a3a-2127-422b-91ae-364da2661108; Patch) - https://kernel.dance/f15f29fd4779be8a418b66e9d52979bb6d6c2325 (af854a3a-2127-422b-91ae-364da2661108; Patch, Vendor Advisory) - https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html (af854a3a-2127-422b-91ae-364da2661108; Mailing List, Third Party Advisory) - https://cert-portal.siemens.com/productcert/html/ssa-794697.html (0b142b55-0307-4c5a-b3c9-f314f3fb7c5e) ## Provenance - CNA: Google: https://www.cve.org/CVERecord?id=CVE-2023-5197; retrieved 2026-11-02; source updated 2026-11-02 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-5197; retrieved 2026-11-03; source updated 2026-11-02 - FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2023-5197; retrieved 2026-11-02; source updated Not reported Revision: e0a5f5281e296a14c5eca3f03875e2f939febf3debb6cc357ffb5f0058a58028 Canonical: https://y2.dev/cve/CVE-2023-5197 ## Agent and API access Public CVE pages, Markdown, and JSON are free to read without an account or API key. - Public catalog: https://y2.dev/cve/index.json. 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