# CVE-2023-3106: Kernel: netlink socket crash (null pointer deref) in netlink_dump function Status: published. Published: 2023-07-12. Updated: 2026-11-07. A NULL pointer dereference vulnerability was found in netlink_dump. This issue can occur when the Netlink socket receives the message(sendmsg) for the XFRM_MSG_GETSA, XFRM_MSG_GETPOLICY type message, and the DUMP flag is set and can cause a denial of service or possibly another unspecified impact. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although it is unlikely. ## Remediation - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: secalert@redhat.com) — https://bugzilla.redhat.com/show_bug.cgi?id=2221501 - fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: secalert@redhat.com) — https://github.com/torvalds/linux/commit/1ba5bf993c6a3142e18e68ea6452b347f9cb5635 - 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://bugzilla.redhat.com/show_bug.cgi?id=2221501 - 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://github.com/torvalds/linux/commit/1ba5bf993c6a3142e18e68ea6452b347f9cb5635 ## Affected products and versions - Red Hat / Red Hat Enterprise Linux 6 (kernel): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 7 (kernel): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 7 (kernel-rt): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 8 (kernel): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 8 (kernel-rt): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 9 (kernel): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Enterprise Linux 9 (kernel-rt): Version range not reported. Source: CNA: redhat ## 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:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.16.39", "versionStartIncluding": "3.15", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.4.223", "versionStartIncluding": "3.17", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.7.10", "versionStartIncluding": "4.5", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:4.8:rc1:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:4.8:rc2:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:4.8:rc3:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:4.8:rc4:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:4.8:rc5:*:*:*:*:*:*", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:4.8:rc6:*:*:*:*:*:*", "vulnerable": true } ], "negate": false, "operator": "OR" } ], "operator": "OR" }, { "negate": false, "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*", "vulnerable": true } ], "negate": false, "operator": "OR" } ], "operator": "OR" } ] ``` ## Severity and prioritization - 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: CNA: redhat - 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: nvd@nist.gov - 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: secalert@redhat.com - CISA KEV: No listing in collected sources - EPSS: 0.29% as of 2026-11-06; percentile 21.88% - SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP - Weaknesses: CWE-476 ## Exploit evidence No exploit evidence in collected sources. This is not proof of no exploitation. ## References - https://access.redhat.com/security/cve/CVE-2023-3106 (CNA: redhat; vdb-entry, x_refsource_REDHAT) - https://bugzilla.redhat.com/show_bug.cgi?id=2221501 (CNA: redhat; issue-tracking, x_refsource_REDHAT) - https://github.com/torvalds/linux/commit/1ba5bf993c6a3142e18e68ea6452b347f9cb5635 (CNA: redhat) - https://access.redhat.com/security/cve/CVE-2023-3106 (ADP: CVE; vdb-entry, x_refsource_REDHAT, x_transferred) - https://bugzilla.redhat.com/show_bug.cgi?id=2221501 (ADP: CVE; issue-tracking, x_refsource_REDHAT, x_transferred) - https://github.com/torvalds/linux/commit/1ba5bf993c6a3142e18e68ea6452b347f9cb5635 (ADP: CVE; x_transferred) - https://access.redhat.com/security/cve/CVE-2023-3106 (secalert@redhat.com; Third Party Advisory) - https://bugzilla.redhat.com/show_bug.cgi?id=2221501 (secalert@redhat.com; Issue Tracking, Patch, Third Party Advisory) - https://github.com/torvalds/linux/commit/1ba5bf993c6a3142e18e68ea6452b347f9cb5635 (secalert@redhat.com; Patch) - https://access.redhat.com/security/cve/CVE-2023-3106 (af854a3a-2127-422b-91ae-364da2661108; Third Party Advisory) - https://bugzilla.redhat.com/show_bug.cgi?id=2221501 (af854a3a-2127-422b-91ae-364da2661108; Issue Tracking, Patch, Third Party Advisory) - https://github.com/torvalds/linux/commit/1ba5bf993c6a3142e18e68ea6452b347f9cb5635 (af854a3a-2127-422b-91ae-364da2661108; Patch) ## Provenance - CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2023-3106; retrieved 2026-11-07; source updated 2026-11-07 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-3106; retrieved 2026-11-07; source updated 2026-11-07 - FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2023-3106; retrieved 2026-11-07; source updated Not reported Revision: 4b0a7badde76261968795ad36db3c3dcccc5a8b9bb213ccd90ed848b14b99673 Canonical: https://y2.dev/cve/CVE-2023-3106 ## 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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