{"id":"CVE-2023-53600","revision":"ae7dfa0052ab4478a0d5c5069a2731b9","records":[{"revision":"ae7dfa0052ab4478a0d5c5069a2731b9","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2023-53600","aliases":[],"title":"tunnels: fix kasan splat when generating ipv4 pmtu error","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntunnels: fix kasan splat when generating ipv4 pmtu error\n\nIf we try to emit an icmp error in response to a nonliner skb, we get\n\nBUG: KASAN: slab-out-of-bounds in ip_compute_csum+0x134/0x220\nRead of size 4 at addr ffff88811c50db00 by task iperf3/1691\nCPU: 2 PID: 1691 Comm: iperf3 Not tainted 6.5.0-rc3+ #309\n[..]\n kasan_report+0x105/0x140\n ip_compute_csum+0x134/0x220\n iptunnel_pmtud_build_icmp+0x554/0x1020\n skb_tunnel_check_pmtu+0x513/0xb80\n vxlan_xmit_one+0x139e/0x2ef0\n vxlan_xmit+0x1867/0x2760\n dev_hard_start_xmit+0x1ee/0x4f0\n br_dev_queue_push_xmit+0x4d1/0x660\n [..]\n\nip_compute_csum() cannot deal with nonlinear skbs, so avoid it.\nAfter this change, splat is gone and iperf3 is no longer stuck.","state":0,"publishedAt":"2025-10-04T15:44:11.775+00:00","modifiedAt":"2026-10-15T21:41:31.545+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ipv4/ip_tunnel_core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4cb47a8644cc9eb8ec81190a50e79e6530d0297f\",\n                            \"lessThan\": \"5850c391fd7e25662334cb3cbf29a62bcbff1084\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4cb47a8644cc9eb8ec81190a50e79e6530d0297f\",\n                            \"lessThan\": \"e95808121953410db8c59f0abfde70ac0d34222c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4cb47a8644cc9eb8ec81190a50e79e6530d0297f\",\n                            \"lessThan\": \"da5f42a6e7485fbb7a6dbd6a2b3045e19e4df5cc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4cb47a8644cc9eb8ec81190a50e79e6530d0297f\",\n                            \"lessThan\": \"fe6a9f7516735be9fdabab00e47ef7a3403a174d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4cb47a8644cc9eb8ec81190a50e79e6530d0297f\",\n                            \"lessThan\": \"6a7ac3d20593865209dceb554d8b3f094c6bd940\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ipv4/ip_tunnel_core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.9\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.191\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.127\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.46\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.4.11\",\n                            \"lessThanOrEqual\": \"6.4.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.5\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","score":9.1,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/5850c391fd7e25662334cb3cbf29a62bcbff1084","https://git.kernel.org/stable/c/e95808121953410db8c59f0abfde70ac0d34222c","https://git.kernel.org/stable/c/da5f42a6e7485fbb7a6dbd6a2b3045e19e4df5cc","https://git.kernel.org/stable/c/fe6a9f7516735be9fdabab00e47ef7a3403a174d","https://git.kernel.org/stable/c/6a7ac3d20593865209dceb554d8b3f094c6bd940"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53600","license":"CVE Program Terms of Use","key":"cve-program:CVE-2023-53600","identifiers":["CVE-2023-53600"]},"retained":false,"historicalAffected":[]}],"coverage":[]}