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mpls: fix NULL deref in mpls_valid_fib_dump_req() on CONFIG_INET=n

Type: advisorySource: OSV1 source record

In the Linux kernel, the following vulnerability has been resolved: mpls: fix NULL deref in mpls_valid_fib_dump_req() on CONFIG_INET=n On CONFIG_INET=n builds, mpls_valid_fib_dump_req() walks the parsed attribute table itself instead of calling ip_valid_fib_dump_req(). The RTA_OIF arm passes tb[RTA_OIF] to nla_get_u32() without checking it is present, so an RTM_GETROUTE dump for AF_MPLS with strict checking and no RTA_OIF hits a NULL dereference. RTM_GETROUTE is RTNL_KIND_GET, which rtnetlink_rcv_msg() permits without CAP_NET_ADMIN, so an unprivileged user can trigger it. Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:mpls_valid_fib_dump_req (net/mpls/af_mpls.c:2189) Call Trace: mpls_dump_routes (net/mpls/af_mpls.c:2236) netlink_dump (net/netlink/af_netlink.c:2331) __netlink_dump_start (net/netlink/af_netlink.c:2446) rtnetlink_rcv_msg (net/core/rtnetlink.c:7033) netlink_rcv_skb (net/netlink/af_netlink.c:2556) netlink_unicast (net/netlink/af_netlink.c:1345) netlink_sendmsg (net/netlink/af_netlink.c:1900) __sock_sendmsg (net/socket.c:790) ____sys_sendmsg (net/socket.c:2684) ___sys_sendmsg (net/socket.c:2738) __sys_sendmsg (net/socket.c:2770) do_syscall_64 (arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121) Skip unset attributes, as ip_valid_fib_dump_req() does.

Announced Group revision 1
Original source ↗

CVE-2026-64569

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:CVE-2026-64569

Kernel

Source reference: /affected/1/package/name

Affected versions
Not stated in this record
Fixed versions
5.10.265

Source reference: /affected/1/ranges

5.15.216

Source reference: /affected/1/ranges

6.1.183

Source reference: /affected/1/ranges

6.6.148

Source reference: /affected/1/ranges

6.12.101

Source reference: /affected/1/ranges

6.18.42

Source reference: /affected/1/ranges

7.1.6

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
        "type": "GIT",
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          {
            "introduced": "196cfebf897266c3450519e916bab9daff74e52c"
          },
          {
            "fixed": "bfc1cb5d6a8308e493e307f1c823d2107abc0a47"
          },
          {
            "fixed": "03b5a2c29afc8e634924c75d6ee94140e70de88d"
          },
          {
            "fixed": "e796ce9ef4356dc7cbbaa8373843f77852f2814d"
          },
          {
            "fixed": "d6eee7cd078aaf9dd75efc801f6c9b608a37cd71"
          },
          {
            "fixed": "ad6284ced6a15e4abd57ca4d0793b7bd15ca52ce"
          },
          {
            "fixed": "5f6e7b32bd1fbde10fd31a4143260735ea535b8a"
          },
          {
            "fixed": "06db79411a280707c7e4bf4b221ff4e664b51502"
          },
          {
            "fixed": "56d96fededd61192cd7cc8d2b0f36adfd59036c3"
          }
        ]
      }
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64569.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "4.20.0"
          },
          {
            "fixed": "5.10.265"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "5.11.0"
          },
          {
            "fixed": "5.15.216"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "5.16.0"
          },
          {
            "fixed": "6.1.183"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.2.0"
          },
          {
            "fixed": "6.6.148"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.7.0"
          },
          {
            "fixed": "6.12.101"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.13.0"
          },
          {
            "fixed": "6.18.42"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.19.0"
          },
          {
            "fixed": "7.1.6"
          }
        ]
      }
    ],
    "package": {
      "name": "Kernel",
      "ecosystem": "Linux"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64569.json"
    }
  }
]
Related CVEs
CVE-2026-64569

Source reference: /id

Publisher severity

No explicit severity was provided.

Event
#50812 · Revision 1
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Publisher date
Read the original announcement

Revision history

  1. CVE-2026-64569 · Revision 1Source updated