{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "6fff607e2f14bd7c63c06c464a6f93b8efbabe28"
            },
            {
              "fixed": "f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5"
            },
            {
              "fixed": "a12b1575f9feabd91695a9e9d004862f7195fa25"
            },
            {
              "fixed": "ff39d0e3b4feeb65ca43c453d7c75fdf872ded0d"
            },
            {
              "fixed": "888706a76286c547bd035432602571e8024b5305"
            },
            {
              "fixed": "db77b6bb6e6edb79b10b4efcce346eec5582d588"
            },
            {
              "fixed": "4e40056bb5c829f0423f0a6694a0477726d2147e"
            },
            {
              "fixed": "bd004716ba75fed6d185795c85cdc92540ebeaab"
            },
            {
              "fixed": "0c0a8ed85349dae298712d79cb276acfeb794d82"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.20.0"
            },
            {
              "fixed": "5.10.261"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.212"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64548.json"
  },
  "details": "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.",
  "id": "CVE-2026-64548",
  "modified": "2026-07-29T03:30:32.031495473Z",
  "published": "2026-07-27T20:10:38.355Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c0a8ed85349dae298712d79cb276acfeb794d82"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4e40056bb5c829f0423f0a6694a0477726d2147e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/888706a76286c547bd035432602571e8024b5305"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a12b1575f9feabd91695a9e9d004862f7195fa25"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd004716ba75fed6d185795c85cdc92540ebeaab"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/db77b6bb6e6edb79b10b4efcce346eec5582d588"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff39d0e3b4feeb65ca43c453d7c75fdf872ded0d"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64548.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64548"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()"
}