{"id":"CVE-2026-64548","revision":"072cc8e218a34554a5fd037c399bf04e","records":[{"revision":"072cc8e218a34554a5fd037c399bf04e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-64548","aliases":[],"title":"bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()\n\nWhen the scatterlist ring is full or nearly full, bpf_msg_push_data()\nenters a copy fallback path and computes copy + len for the page\nallocation size. Since len comes from BPF with arg3_type = ARG_ANYTHING\nand both are u32, a crafted len can wrap the sum to a small value,\ncausing an undersized allocation followed by an out-of-bounds memcpy.\n\n BUG: unable to handle page fault for address: ffffed104089a402\n Oops: Oops: 0000 [#1] SMP KASAN NOPTI\n Call Trace:\n  __asan_memcpy (mm/kasan/shadow.c:105)\n  bpf_msg_push_data (net/core/filter.c:2852 net/core/filter.c:2788)\n  bpf_prog_9ed8b5711920a7d7+0x2e/0x36\n  sk_psock_msg_verdict (net/core/skmsg.c:934)\n  tcp_bpf_sendmsg (net/ipv4/tcp_bpf.c:421 net/ipv4/tcp_bpf.c:584)\n  __sys_sendto (net/socket.c:2206)\n  do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n\nAdd an overflow check before the allocation.","state":0,"publishedAt":"2026-07-27T20:10:38.355+00:00","modifiedAt":"2026-10-19T20:48:40.311+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/filter.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\n                            \"lessThan\": \"f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\n                            \"lessThan\": \"a12b1575f9feabd91695a9e9d004862f7195fa25\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\n                            \"lessThan\": \"ff39d0e3b4feeb65ca43c453d7c75fdf872ded0d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\n                            \"lessThan\": \"888706a76286c547bd035432602571e8024b5305\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\n                            \"lessThan\": \"db77b6bb6e6edb79b10b4efcce346eec5582d588\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\n                            \"lessThan\": \"4e40056bb5c829f0423f0a6694a0477726d2147e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\n                            \"lessThan\": \"bd004716ba75fed6d185795c85cdc92540ebeaab\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\n                            \"lessThan\": \"0c0a8ed85349dae298712d79cb276acfeb794d82\",\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/filter.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\": \"5.10.261\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.212\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.178\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.145\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.97\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.40\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.5\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.4,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5","https://git.kernel.org/stable/c/a12b1575f9feabd91695a9e9d004862f7195fa25","https://git.kernel.org/stable/c/ff39d0e3b4feeb65ca43c453d7c75fdf872ded0d","https://git.kernel.org/stable/c/888706a76286c547bd035432602571e8024b5305","https://git.kernel.org/stable/c/db77b6bb6e6edb79b10b4efcce346eec5582d588","https://git.kernel.org/stable/c/4e40056bb5c829f0423f0a6694a0477726d2147e","https://git.kernel.org/stable/c/bd004716ba75fed6d185795c85cdc92540ebeaab","https://git.kernel.org/stable/c/0c0a8ed85349dae298712d79cb276acfeb794d82"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64548","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-64548","identifiers":["CVE-2026-64548"]},"retained":false,"historicalAffected":[]}],"coverage":[]}