{"id":"CVE-2023-3772","state":"PUBLISHED","title":"Kernel: xfrm: null pointer dereference in xfrm_update_ae_params()","description":"A flaw was found in the Linux kernel’s IP framework for transforming packets (XFRM subsystem). This issue may allow a malicious user with CAP_NET_ADMIN privileges to directly dereference a NULL pointer in xfrm_update_ae_params(), leading to a possible kernel crash and denial of service.","publishedAt":"2023-07-25T15:47:40.183Z","updatedAt":"2026-10-14T21:13:43.266Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"redhat"},"assigner":"redhat","products":["Red Hat Red Hat Enterprise Linux 8","Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support","Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support","Red Hat Red Hat Enterprise Linux 9","Red Hat Red Hat Virtualization 4 for Red Hat Enterprise Linux 8","Red Hat Red Hat Enterprise Linux 6","Red Hat Red Hat Enterprise Linux 7"],"affected":[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","packageName":"kernel-rt","defaultStatus":"affected","versions":[{"version":"0:4.18.0-513.5.1.rt7.307.el8_9","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:8::realtime","cpe:/a:redhat:enterprise_linux:8::nfv"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","packageName":"kernel","defaultStatus":"affected","versions":[{"version":"0:4.18.0-513.5.1.el8_9","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8::baseos","cpe:/a:redhat:enterprise_linux:8::crb"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Extended Update Support","packageName":"kernel","defaultStatus":"affected","versions":[{"version":"0:4.18.0-372.87.1.el8_6","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:rhel_eus:8.6::baseos","cpe:/a:redhat:rhel_eus:8.6::crb","cpe:/o:redhat:rhev_hypervisor:4.4::el8"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.8 Extended Update Support","packageName":"kernel","defaultStatus":"affected","versions":[{"version":"0:4.18.0-477.43.1.el8_8","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus:8.8::crb","cpe:/o:redhat:rhel_eus:8.8::baseos"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","packageName":"kernel","defaultStatus":"affected","versions":[{"version":"0:5.14.0-362.8.1.el9_3","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9::appstream","cpe:/a:redhat:enterprise_linux:9::nfv","cpe:/o:redhat:enterprise_linux:9::baseos","cpe:/a:redhat:enterprise_linux:9::crb","cpe:/a:redhat:enterprise_linux:9::realtime"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","packageName":"kernel","defaultStatus":"affected","versions":[{"version":"0:5.14.0-362.8.1.el9_3","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9::appstream","cpe:/a:redhat:enterprise_linux:9::nfv","cpe:/o:redhat:enterprise_linux:9::baseos","cpe:/a:redhat:enterprise_linux:9::crb","cpe:/a:redhat:enterprise_linux:9::realtime"]},{"vendor":"Red Hat","product":"Red Hat Virtualization 4 for Red Hat Enterprise Linux 8","packageName":"kernel","defaultStatus":"affected","versions":[{"version":"0:4.18.0-372.87.1.el8_6","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:rhel_eus:8.6::baseos","cpe:/a:redhat:rhel_eus:8.6::crb","cpe:/o:redhat:rhev_hypervisor:4.4::el8"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 6","packageName":"kernel","defaultStatus":"unknown","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 7","packageName":"kernel","defaultStatus":"unknown","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 7","packageName":"kernel-rt","defaultStatus":"unknown","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","packageName":"kernel-rt","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"]}],"references":["https://access.redhat.com/errata/RHSA-2023:6583","https://access.redhat.com/errata/RHSA-2023:6901","https://access.redhat.com/errata/RHSA-2023:7077","https://access.redhat.com/errata/RHSA-2024:0412","https://access.redhat.com/errata/RHSA-2024:0575","https://access.redhat.com/security/cve/CVE-2023-3772","https://bugzilla.redhat.com/show_bug.cgi?id=2218943","http://www.openwall.com/lists/oss-security/2023/08/10/1","http://www.openwall.com/lists/oss-security/2023/08/10/3","https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html","https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html","https://www.debian.org/security/2023/dsa-5492","https://cert-portal.siemens.com/productcert/html/ssa-794697.html","https://cert-portal.siemens.com/productcert/html/ssa-398330.html"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:06:08.715Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/3xxx/CVE-2023-3772.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-3772","state":"PUBLISHED","datePublished":"2023-07-25T15:47:40.183Z","dateUpdated":"2026-10-14T21:13:43.266Z","assignerShortName":"redhat","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateReserved":"2023-07-19T13:55:07.799Z"},"containers":{"cna":{"title":"Kernel: xfrm: null pointer dereference in xfrm_update_ae_params()","descriptions":[{"lang":"en","value":"A flaw was found in the Linux kernel’s IP framework for transforming packets (XFRM subsystem). This issue may allow a malicious user with CAP_NET_ADMIN privileges to directly dereference a NULL pointer in xfrm_update_ae_params(), leading to a possible kernel crash and denial of service."}],"affected":[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","packageName":"kernel-rt","defaultStatus":"affected","versions":[{"version":"0:4.18.0-513.5.1.rt7.307.el8_9","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:8::realtime","cpe:/a:redhat:enterprise_linux:8::nfv"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","packageName":"kernel","defaultStatus":"affected","versions":[{"version":"0:4.18.0-513.5.1.el8_9","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8::baseos","cpe:/a:redhat:enterprise_linux:8::crb"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Extended Update Support","packageName":"kernel","defaultStatus":"affected","versions":[{"version":"0:4.18.0-372.87.1.el8_6","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:rhel_eus:8.6::baseos","cpe:/a:redhat:rhel_eus:8.6::crb","cpe:/o:redhat:rhev_hypervisor:4.4::el8"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.8 Extended Update Support","packageName":"kernel","defaultStatus":"affected","versions":[{"version":"0:4.18.0-477.43.1.el8_8","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus:8.8::crb","cpe:/o:redhat:rhel_eus:8.8::baseos"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","packageName":"kernel","defaultStatus":"affected","versions":[{"version":"0:5.14.0-362.8.1.el9_3","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9::appstream","cpe:/a:redhat:enterprise_linux:9::nfv","cpe:/o:redhat:enterprise_linux:9::baseos","cpe:/a:redhat:enterprise_linux:9::crb","cpe:/a:redhat:enterprise_linux:9::realtime"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","packageName":"kernel","defaultStatus":"affected","versions":[{"version":"0:5.14.0-362.8.1.el9_3","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9::appstream","cpe:/a:redhat:enterprise_linux:9::nfv","cpe:/o:redhat:enterprise_linux:9::baseos","cpe:/a:redhat:enterprise_linux:9::crb","cpe:/a:redhat:enterprise_linux:9::realtime"]},{"vendor":"Red Hat","product":"Red Hat Virtualization 4 for Red Hat Enterprise Linux 8","packageName":"kernel","defaultStatus":"affected","versions":[{"version":"0:4.18.0-372.87.1.el8_6","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:rhel_eus:8.6::baseos","cpe:/a:redhat:rhel_eus:8.6::crb","cpe:/o:redhat:rhev_hypervisor:4.4::el8"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 6","packageName":"kernel","defaultStatus":"unknown","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 7","packageName":"kernel","defaultStatus":"unknown","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 7","packageName":"kernel-rt","defaultStatus":"unknown","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","packageName":"kernel-rt","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"]}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2023:6583","name":"RHSA-2023:6583","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2023:6901","name":"RHSA-2023:6901","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2023:7077","name":"RHSA-2023:7077","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2024:0412","name":"RHSA-2024:0412","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2024:0575","name":"RHSA-2024:0575","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2023-3772","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2218943","name":"RHBZ#2218943","tags":["issue-tracking","x_refsource_REDHAT"]}],"metrics":[{"other":{"content":{"value":"Moderate","namespace":"https://access.redhat.com/security/updates/classification/"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-476","description":"NULL Pointer Dereference","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"redhat","orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateUpdated":"2025-11-07T13:03:42.167Z"},"datePublic":"2023-07-21T00:00:00.000Z","x_redhatCweChain":"CWE-476: NULL Pointer Dereference","timeline":[{"lang":"en","time":"2023-06-29T00:00:00.000Z","value":"Reported to Red Hat."},{"lang":"en","time":"2023-07-21T00:00:00.000Z","value":"Made public."}],"credits":[{"lang":"en","value":"Red Hat would like to thank Lin Ma (ZJU & Ant Security Light-Year Lab) for reporting this issue."}]},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2023/08/10/1","tags":["x_transferred"]},{"url":"http://www.openwall.com/lists/oss-security/2023/08/10/3","tags":["x_transferred"]},{"url":"https://access.redhat.com/errata/RHSA-2023:6583","name":"RHSA-2023:6583","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred"]},{"url":"https://access.redhat.com/errata/RHSA-2023:6901","name":"RHSA-2023:6901","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred"]},{"url":"https://access.redhat.com/errata/RHSA-2023:7077","name":"RHSA-2023:7077","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred"]},{"url":"https://access.redhat.com/errata/RHSA-2024:0412","name":"RHSA-2024:0412","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred"]},{"url":"https://access.redhat.com/errata/RHSA-2024:0575","name":"RHSA-2024:0575","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred"]},{"url":"https://access.redhat.com/security/cve/CVE-2023-3772","tags":["vdb-entry","x_refsource_REDHAT","x_transferred"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2218943","name":"RHBZ#2218943","tags":["issue-tracking","x_refsource_REDHAT","x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html","tags":["x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html","tags":["x_transferred"]},{"url":"https://www.debian.org/security/2023/dsa-5492","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T07:08:49.645Z"}},{"affected":[{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.0","status":"affected","lessThan":"V3.1.5","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.0","status":"affected","lessThan":"V3.1.5","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.0","status":"affected","lessThan":"V3.1.5","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.0","status":"affected","lessThan":"V3.1.5","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"V1.1","versionType":"custom"}]},{"vendor":"Siemens","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.0","status":"affected","lessThan":"V3.1.5","versionType":"custom"}]}],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-794697.html"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-398330.html"}],"providerMetadata":{"shortName":"siemens-SADP","orgId":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","dateUpdated":"2026-10-14T21:13:43.266Z"},"x_adpType":"supplier"}]}}}