{"affected":[],"cveId":"CVE-2026-64548","cwes":["CWE-190"],"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":8.4,"severity":"high","source":"NVD: 416baaa9-dc9f-4396-8d5f-8c081fb06d67","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1793729739353,"publishedAt":1785187027570,"references":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/0c0a8ed85349dae298712d79cb276acfeb794d82"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/4e40056bb5c829f0423f0a6694a0477726d2147e"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/888706a76286c547bd035432602571e8024b5305"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/a12b1575f9feabd91695a9e9d004862f7195fa25"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/bd004716ba75fed6d185795c85cdc92540ebeaab"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/db77b6bb6e6edb79b10b4efcce346eec5582d588"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/ff39d0e3b4feeb65ca43c453d7c75fdf872ded0d"}],"remediation":[],"revision":"55f93ad9832f60027e42f20386489fb04c68c093c90e0225504e279b04f23350","sources":[{"modifiedAt":1793729739353,"name":"NVD","retrievedAt":1793729783505,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64548"}],"ssvc":{"assessedAt":1792165343113,"automatable":"no","exploitation":"none","source":"NVD SSVC: 134c704f-9b21-4f2e-91b3-4a467353bcc0","technicalImpact":"total"},"status":"published","title":"CVE-2026-64548","updatedAt":1793729783505}