FKIE_CVE-2026-53214

Vulnerability from fkie_nvd - Published: 2026-06-25 09:16 - Updated: 2026-06-30 14:44
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix a potential NPD in cleanup_prefix_route() addrconf_get_prefix_route() can return the fib6_null_entry sentinel entry which has a NULL fib6_table pointer. Therefore, before setting the route's expiration time, check that we are not working with this entry, as otherwise a NPD will be triggered [1]. Note that the other callers of addrconf_get_prefix_route() are not susceptible to this bug: 1. addrconf_prefix_rcv(): Requests a route with the 'RTF_ADDRCONF | RTF_PREFIX_RT' flags which are not set on fib6_null_entry. 2. modify_prefix_route(): Fixed by commit a747e02430df ("ipv6: avoid possible NULL deref in modify_prefix_route()"). 3. __ipv6_ifa_notify(): Calls ip6_del_rt() which specifically checks for fib6_null_entry and returns an error. [1] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] [...] Call Trace: <TASK> __kasan_check_byte (mm/kasan/common.c:573) lock_acquire.part.0 (kernel/locking/lockdep.c:5842 (discriminator 1)) _raw_spin_lock_bh (kernel/locking/spinlock.c:182 (discriminator 1)) cleanup_prefix_route (net/ipv6/addrconf.c:1280) ipv6_del_addr (net/ipv6/addrconf.c:1342) inet6_addr_del.isra.0 (net/ipv6/addrconf.c:3119) inet6_rtm_deladdr (net/ipv6/addrconf.c:4812) rtnetlink_rcv_msg (net/core/rtnetlink.c:6997) netlink_rcv_skb (net/netlink/af_netlink.c:2555) netlink_unicast (net/netlink/af_netlink.c:1344) netlink_sendmsg (net/netlink/af_netlink.c:1899) __sock_sendmsg (net/socket.c:802 (discriminator 4)) ____sys_sendmsg (net/socket.c:2698) ___sys_sendmsg (net/socket.c:2752) __sys_sendmsg (net/socket.c:2784) do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/07d9a0870a178843cea44cfd58c27445dc94cf5f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/192df376a05c2db15564640f9da7e20907c1fa24
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5f82b02b4059ddc06e4fcfd057bfb59fd6885cd2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/653a2849305708f75260b5296f17b2a759ff9cc7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b70c687b7cf267fb08586667a3946c8851cad672
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv6/addrconf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5f82b02b4059ddc06e4fcfd057bfb59fd6885cd2",
              "status": "affected",
              "version": "bd12abe294c7738421bdfbc486f1909d02db30e9",
              "versionType": "git"
            },
            {
              "lessThan": "192df376a05c2db15564640f9da7e20907c1fa24",
              "status": "affected",
              "version": "5eb902b8e7193cdcb33242af0a56502e6b5206e9",
              "versionType": "git"
            },
            {
              "lessThan": "07d9a0870a178843cea44cfd58c27445dc94cf5f",
              "status": "affected",
              "version": "5eb902b8e7193cdcb33242af0a56502e6b5206e9",
              "versionType": "git"
            },
            {
              "lessThan": "653a2849305708f75260b5296f17b2a759ff9cc7",
              "status": "affected",
              "version": "5eb902b8e7193cdcb33242af0a56502e6b5206e9",
              "versionType": "git"
            },
            {
              "lessThan": "b70c687b7cf267fb08586667a3946c8851cad672",
              "status": "affected",
              "version": "5eb902b8e7193cdcb33242af0a56502e6b5206e9",
              "versionType": "git"
            },
            {
              "lessThan": "6.6.143",
              "status": "affected",
              "version": "6.6.120",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv6/addrconf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.94",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: Fix a potential NPD in cleanup_prefix_route()\n\naddrconf_get_prefix_route() can return the fib6_null_entry sentinel\nentry which has a NULL fib6_table pointer. Therefore, before setting the\nroute\u0027s expiration time, check that we are not working with this entry,\nas otherwise a NPD will be triggered [1].\n\nNote that the other callers of addrconf_get_prefix_route() are not\nsusceptible to this bug:\n\n1. addrconf_prefix_rcv(): Requests a route with the \u0027RTF_ADDRCONF |\n   RTF_PREFIX_RT\u0027 flags which are not set on fib6_null_entry.\n\n2. modify_prefix_route(): Fixed by commit a747e02430df (\"ipv6: avoid\n   possible NULL deref in modify_prefix_route()\").\n\n3. __ipv6_ifa_notify(): Calls ip6_del_rt() which specifically checks for\n   fib6_null_entry and returns an error.\n\n[1]\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]\n[...]\nCall Trace:\n\u003cTASK\u003e\n__kasan_check_byte (mm/kasan/common.c:573)\nlock_acquire.part.0 (kernel/locking/lockdep.c:5842 (discriminator 1))\n_raw_spin_lock_bh (kernel/locking/spinlock.c:182 (discriminator 1))\ncleanup_prefix_route (net/ipv6/addrconf.c:1280)\nipv6_del_addr (net/ipv6/addrconf.c:1342)\ninet6_addr_del.isra.0 (net/ipv6/addrconf.c:3119)\ninet6_rtm_deladdr (net/ipv6/addrconf.c:4812)\nrtnetlink_rcv_msg (net/core/rtnetlink.c:6997)\nnetlink_rcv_skb (net/netlink/af_netlink.c:2555)\nnetlink_unicast (net/netlink/af_netlink.c:1344)\nnetlink_sendmsg (net/netlink/af_netlink.c:1899)\n__sock_sendmsg (net/socket.c:802 (discriminator 4))\n____sys_sendmsg (net/socket.c:2698)\n___sys_sendmsg (net/socket.c:2752)\n__sys_sendmsg (net/socket.c:2784)\ndo_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)\nentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)"
    }
  ],
  "id": "CVE-2026-53214",
  "lastModified": "2026-06-30T14:44:27.313",
  "metrics": {},
  "published": "2026-06-25T09:16:39.053",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/07d9a0870a178843cea44cfd58c27445dc94cf5f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/192df376a05c2db15564640f9da7e20907c1fa24"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5f82b02b4059ddc06e4fcfd057bfb59fd6885cd2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/653a2849305708f75260b5296f17b2a759ff9cc7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b70c687b7cf267fb08586667a3946c8851cad672"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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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.

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