x86/mm: Disallow vsyscall page read for copy_from_kernel_nofault()

{
  "id": "4dabc860d18c4b044e136a9facdc9618019137a5d439f33435ce457b6b1aa987",
  "url": "https://osv.dev/vulnerability/CVE-2024-26906",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "x86/mm: Disallow vsyscall page read for copy_from_kernel_nofault()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: x86/mm: Disallow vsyscall page read for copy_from_kernel_nofault() When trying to use copy_from_kernel_nofault() to read vsyscall page through a bpf program, the following oops was reported: BUG: unable to handle page fault for address: ffffffffff600000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 3231067 P4D 3231067 PUD 3233067 PMD 3235067 PTE 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 1 PID: 20390 Comm: test_progs ...... 6.7.0+ #58 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) ...... RIP: 0010:copy_from_kernel_nofault+0x6f/0x110 ...... Call Trace: ? copy_from_kernel_nofault+0x6f/0x110 bpf_probe_read_kernel+0x1d/0x50 bpf_prog_2061065e56845f08_do_probe_read+0x51/0x8d trace_call_bpf+0xc5/0x1c0 perf_call_bpf_enter.isra.0+0x69/0xb0 perf_syscall_enter+0x13e/0x200 syscall_trace_enter+0x188/0x1c0 do_syscall_64+0xb5/0xe0 entry_SYSCALL_64_after_hwframe+0x6e/0x76 ...... ---[ end trace 0000000000000000 ]--- The oops is triggered when: 1) A bpf program uses bpf_probe_read_kernel() to read from the vsyscall page and invokes copy_from_kernel_nofault() which in turn calls __get_user_asm(). 2) Because the vsyscall page address is not readable from kernel space, a page fault exception is triggered accordingly. 3) handle_page_fault() considers the vsyscall page address as a user space address instead of a kernel space address. This results in the fix-up setup by bpf not being a",
    "evidence": "osv:CVE-2024-26906",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.214",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.153",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.83",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.23",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.7.11",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-26906",
      "aliases": [
        "CVE-2024-26906"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "75a1a607bb7e6d918be3aca11ec2214a275392f4"
                },
                {
                  "fixed": "6e4694e65b6db4c3de125115dd4f55848cc48381"
                },
                {
                  "fixed": "e8a67fe34b76a49320b33032228a794f40b0316b"
                },
                {
                  "fixed": "f175de546a3eb77614d94d4c02550181c0a8493e"
                },
                {
                  "fixed": "57f78c46f08198e1be08ffe99c4c1ccc12855bf5"
                },
                {
                  "fixed": "29bd6f86904682adafe9affbc7f79b14defcaff8"
                },
                {
                  "fixed": "32019c659ecfe1d92e3bf9fcdfbb11a7c70acd58"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26906.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
                },
                {
                  "fixed": "5.10.214"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.153"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.83"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.23"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.7.11"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26906.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.605180583Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-265688.html",
        "https://git.kernel.org/stable/c/29bd6f86904682adafe9affbc7f79b14defcaff8",
        "https://git.kernel.org/stable/c/32019c659ecfe1d92e3bf9fcdfbb11a7c70acd58",
        "https://git.kernel.org/stable/c/57f78c46f08198e1be08ffe99c4c1ccc12855bf5",
        "https://git.kernel.org/stable/c/6e4694e65b6db4c3de125115dd4f55848cc48381",
        "https://git.kernel.org/stable/c/e8a67fe34b76a49320b33032228a794f40b0316b",
        "https://git.kernel.org/stable/c/f175de546a3eb77614d94d4c02550181c0a8493e",
        "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26906.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-26906",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26906.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-26906",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 509313,
  "published_at": "2024-04-17T10:27:53.573+00:00"
}