{"id":"CVE-2026-81002","revision":"9a11234074484e97b050b17d2627ed2d","records":[{"revision":"9a11234074484e97b050b17d2627ed2d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-81002","aliases":[],"title":"xdp: fix zero-copy frame layout","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxdp: fix zero-copy frame layout\n\nxdp_convert_zc_to_xdp_frame() clones an XSK packet into an order-0 page\nand advertises PAGE_SIZE as its frame size.  It allows the copied frame\nto occupy the page tail needed by skb_shared_info and records zero\nheadroom even when metadata separates the frame header from packet data.\nAn AF_XDP zero-copy packet redirected through cpumap can therefore make\nthe skb overlap skb_shared_info or place it beyond the allocated page.\n\nLimit the copied layout to SKB_WITH_OVERHEAD(PAGE_SIZE) and include the\nmetadata length in frame headroom.  Redirect callers already handle a\nNULL conversion result.\n\nBUG: KASAN: slab-out-of-bounds in skb_gro_receive\nWrite of size 4 at addr ffff88800cf37004 by task cpumap/1/map:1/146\nCall Trace:\n skb_gro_receive (net/core/gro.c:174)\n udp_gro_receive (net/ipv4/udp_offload.c:812)\n inet_gro_receive (net/ipv4/af_inet.c:1539)\n dev_gro_receive (net/core/gro.c:515)\n gro_receive_skb (net/core/gro.c:633)\n cpu_map_kthread_run (kernel/bpf/cpumap.c:395)\n kthread (kernel/kthread.c:436)\n ret_from_fork (arch/x86/kernel/process.c:164)\n ret_from_fork_asm (arch/x86/entry/entry_64.S:255)\nKernel panic - not syncing: KASAN: panic_on_warn set ...","state":0,"publishedAt":"2026-09-11T19:42:55.506+00:00","modifiedAt":"2026-10-19T08:46:26.611+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/core/xdp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"b0d1beeff2a97a0cf1965ea8f1d13b8973f22582\",\n                            \"lessThan\": \"dcb6db9ca6515fcd3e00c93ec5e27dc7a0a7012f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b0d1beeff2a97a0cf1965ea8f1d13b8973f22582\",\n                            \"lessThan\": \"22092730129077c302d8c947bbe0876f0280c528\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b0d1beeff2a97a0cf1965ea8f1d13b8973f22582\",\n                            \"lessThan\": \"ced3e18cd9b9caf630aaa1e1eac305f5192ba896\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b0d1beeff2a97a0cf1965ea8f1d13b8973f22582\",\n                            \"lessThan\": \"6de17275b3ccdf9887568b07e54da2e3597217cf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b0d1beeff2a97a0cf1965ea8f1d13b8973f22582\",\n                            \"lessThan\": \"444216dacdbebd3e52d5e704facafbb230da09e9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b0d1beeff2a97a0cf1965ea8f1d13b8973f22582\",\n                            \"lessThan\": \"15d1f3c0dbe7a740f779337deb39f23cd8d002c8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b0d1beeff2a97a0cf1965ea8f1d13b8973f22582\",\n                            \"lessThan\": \"68d7cc5512238693670fc19c7a615df631e10edf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b0d1beeff2a97a0cf1965ea8f1d13b8973f22582\",\n                            \"lessThan\": \"71283aaa6c65b3cec84caf1dc78560985737641f\",\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/core/xdp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.20\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.20\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\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:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/dcb6db9ca6515fcd3e00c93ec5e27dc7a0a7012f","https://git.kernel.org/stable/c/22092730129077c302d8c947bbe0876f0280c528","https://git.kernel.org/stable/c/ced3e18cd9b9caf630aaa1e1eac305f5192ba896","https://git.kernel.org/stable/c/6de17275b3ccdf9887568b07e54da2e3597217cf","https://git.kernel.org/stable/c/444216dacdbebd3e52d5e704facafbb230da09e9","https://git.kernel.org/stable/c/15d1f3c0dbe7a740f779337deb39f23cd8d002c8","https://git.kernel.org/stable/c/68d7cc5512238693670fc19c7a615df631e10edf","https://git.kernel.org/stable/c/71283aaa6c65b3cec84caf1dc78560985737641f"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-81002","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-81002","identifiers":["CVE-2026-81002"]},"retained":false,"historicalAffected":[]}],"coverage":[]}