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CVE-2026-64569 (GCVE-0-2026-64569)

Vulnerability from cvelistv5 – Published: 2026-08-05 08:08 – Updated: 2026-08-19 16:28
VLAI
Title
mpls: fix NULL deref in mpls_valid_fib_dump_req() on CONFIG_INET=n
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 196cfebf897266c3450519e916bab9daff74e52c , < bfc1cb5d6a8308e493e307f1c823d2107abc0a47 (git)
Affected: 196cfebf897266c3450519e916bab9daff74e52c , < 03b5a2c29afc8e634924c75d6ee94140e70de88d (git)
Affected: 196cfebf897266c3450519e916bab9daff74e52c , < e796ce9ef4356dc7cbbaa8373843f77852f2814d (git)
Affected: 196cfebf897266c3450519e916bab9daff74e52c , < d6eee7cd078aaf9dd75efc801f6c9b608a37cd71 (git)
Affected: 196cfebf897266c3450519e916bab9daff74e52c , < ad6284ced6a15e4abd57ca4d0793b7bd15ca52ce (git)
Affected: 196cfebf897266c3450519e916bab9daff74e52c , < 5f6e7b32bd1fbde10fd31a4143260735ea535b8a (git)
Affected: 196cfebf897266c3450519e916bab9daff74e52c , < 06db79411a280707c7e4bf4b221ff4e664b51502 (git)
Affected: 196cfebf897266c3450519e916bab9daff74e52c , < 56d96fededd61192cd7cc8d2b0f36adfd59036c3 (git)
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Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmpls: fix NULL deref in mpls_valid_fib_dump_req() on CONFIG_INET=n\n\nOn CONFIG_INET=n builds, mpls_valid_fib_dump_req() walks the parsed\nattribute table itself instead of calling ip_valid_fib_dump_req(). The\nRTA_OIF arm passes tb[RTA_OIF] to nla_get_u32() without checking it is\npresent, so an RTM_GETROUTE dump for AF_MPLS with strict checking and no\nRTA_OIF hits a NULL dereference.\n\nRTM_GETROUTE is RTNL_KIND_GET, which rtnetlink_rcv_msg() permits without\nCAP_NET_ADMIN, so an unprivileged user can trigger it.\n\n  Oops: general protection fault, probably for non-canonical address\n        0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI\n  KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n  RIP: 0010:mpls_valid_fib_dump_req (net/mpls/af_mpls.c:2189)\n  Call Trace:\n   mpls_dump_routes (net/mpls/af_mpls.c:2236)\n   netlink_dump (net/netlink/af_netlink.c:2331)\n   __netlink_dump_start (net/netlink/af_netlink.c:2446)\n   rtnetlink_rcv_msg (net/core/rtnetlink.c:7033)\n   netlink_rcv_skb (net/netlink/af_netlink.c:2556)\n   netlink_unicast (net/netlink/af_netlink.c:1345)\n   netlink_sendmsg (net/netlink/af_netlink.c:1900)\n   __sock_sendmsg (net/socket.c:790)\n   ____sys_sendmsg (net/socket.c:2684)\n   ___sys_sendmsg (net/socket.c:2738)\n   __sys_sendmsg (net/socket.c:2770)\n   do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n   entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n\nSkip unset attributes, as ip_valid_fib_dump_req() does."
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      "source": "Microsoft CSAF VEX",
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      "title": "mpls: fix NULL deref in mpls_valid_fib_dump_req() on CONFIG_INET=n",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-64569.json",
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmpls: fix NULL deref in mpls_valid_fib_dump_req() on CONFIG_INET=n\n\nOn CONFIG_INET=n builds, mpls_valid_fib_dump_req() walks the parsed\nattribute table itself instead of calling ip_valid_fib_dump_req(). The\nRTA_OIF arm passes tb[RTA_OIF] to nla_get_u32() without checking it is\npresent, so an RTM_GETROUTE dump for AF_MPLS with strict checking and no\nRTA_OIF hits a NULL dereference.\n\nRTM_GETROUTE is RTNL_KIND_GET, which rtnetlink_rcv_msg() permits without\nCAP_NET_ADMIN, so an unprivileged user can trigger it.\n\n  Oops: general protection fault, probably for non-canonical address\n        0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI\n  KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n  RIP: 0010:mpls_valid_fib_dump_req (net/mpls/af_mpls.c:2189)\n  Call Trace:\n   mpls_dump_routes (net/mpls/af_mpls.c:2236)\n   netlink_dump (net/netlink/af_netlink.c:2331)\n   __netlink_dump_start (net/netlink/af_netlink.c:2446)\n   rtnetlink_rcv_msg (net/core/rtnetlink.c:7033)\n   netlink_rcv_skb (net/netlink/af_netlink.c:2556)\n   netlink_unicast (net/netlink/af_netlink.c:1345)\n   netlink_sendmsg (net/netlink/af_netlink.c:1900)\n   __sock_sendmsg (net/socket.c:790)\n   ____sys_sendmsg (net/socket.c:2684)\n   ___sys_sendmsg (net/socket.c:2738)\n   __sys_sendmsg (net/socket.c:2770)\n   do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n   entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n\nSkip unset attributes, as ip_valid_fib_dump_req() does."
          }
        ],
        "id": "CVE-2026-64569",
        "lastModified": "2026-08-19T17:20:16.777",
        "metrics": {},
        "published": "2026-08-05T08:16:36.547",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/03b5a2c29afc8e634924c75d6ee94140e70de88d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/06db79411a280707c7e4bf4b221ff4e664b51502"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/56d96fededd61192cd7cc8d2b0f36adfd59036c3"
          },
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/5f6e7b32bd1fbde10fd31a4143260735ea535b8a"
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          {
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            "url": "https://git.kernel.org/stable/c/ad6284ced6a15e4abd57ca4d0793b7bd15ca52ce"
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            "url": "https://git.kernel.org/stable/c/bfc1cb5d6a8308e493e307f1c823d2107abc0a47"
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          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/d6eee7cd078aaf9dd75efc801f6c9b608a37cd71"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/e796ce9ef4356dc7cbbaa8373843f77852f2814d"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-06T12:35:45+00:00",
      "cve": "CVE-2026-64569",
      "id": "CVE-2026-64569",
      "initial_release_date": "2026-08-05T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mpls: fix NULL deref in mpls_valid_fib_dump_req() on CONFIG_INET=n",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64569.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-18T00:37:56Z",
      "cve": "CVE-2026-64569",
      "id": "CVE-2026-64569",
      "initial_release_date": "2026-08-06T01:06:29Z",
      "product_status:known_affected": "257",
      "product_status:known_not_affected": "97",
      "product_status:recommended": "87",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64569",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64569.json",
      "version": "8"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.