{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-99053",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-99053",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-10-23T12:22:35.462Z",
    "updatedAt": "2026-10-23T12:22:35.462Z",
    "importedAt": "2026-10-24T01:58:41.756Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "tipc: hold a reference to nodes found by link name",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: hold a reference to nodes found by link name\n\ntipc_node_find_by_name() returns a node after dropping its RCU read lock\nwithout taking a reference.  The LINK_SET, LINK_GET and LINK_RESET_STATS\nhandlers then lock and access the node, racing with timer-driven cleanup of\na down peer.  Generic netlink serialization does not exclude the node\ntimer.\n\nThe following interleaving can leave a handler using a freed node:\n\n  CPU 0: find the node under RCU and release the node read lock\n  CPU 1: tipc_node_timeout() clears the links and unlinks the down node\n  CPU 1: drop the list and timer references, queuing tipc_node_free()\n  CPU 0: leave the RCU read-side critical section\n  CPU 1: complete the grace period and free the node\n  CPU 0: acquire the node lock through the stale pointer\n\nLINK_SET also uses the node's media address after releasing the node lock,\nwhen passing queued packets to tipc_bearer_xmit().\n\nKASAN on v7.3-rc5 reported:\n\n  BUG: KASAN: slab-use-after-free in _raw_read_lock_bh\n  Write of size 4 at addr ffff88807e06f008 by task poc/92\n  Call Trace:\n   _raw_read_lock_bh                 kernel/locking/spinlock.c:287\n   tipc_nl_node_set_link             net/tipc/node.c:2475\n   genl_family_rcv_msg_doit          net/netlink/genetlink.c:1114\n   genl_rcv_msg                      net/netlink/genetlink.c:1209\n   netlink_rcv_skb                   net/netlink/af_netlink.c:2575\n\n  Allocated by task 0:\n   tipc_node_create                  net/tipc/node.c:539\n   tipc_node_check_dest              net/tipc/node.c:1196\n   tipc_disc_rcv                     net/tipc/discover.c:252\n\n  Freed by task 92:\n   kfree                             mm/slub.c:6801\n   rcu_core                          kernel/rcu/tree.c:2919\n\n  Last potentially related work creation:\n   __call_rcu_common.constprop.0     kernel/rcu/tree.c:3181\n   tipc_node_timeout                 net/tipc/node.c:814\n\nAcquire a reference to the selected node with kref_get_unless_zero() before\nleaving RCU, returning NULL if the node has already been released.  Release\nthat reference on every caller exit after the last node access, including\ntransmission in LINK_SET.  Keep the existing link lookup order and locking\nso concurrent link removal still takes the existing error paths.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "6a939f365bdb03a74b4617bdb4402fc08da088b9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b60259d4047fbb735476c729dcf9306a038b6110"
            },
            {
              "version": "6a939f365bdb03a74b4617bdb4402fc08da088b9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f17e70206a1e763fcca2578a8db3c4eed0f843a9"
            },
            {
              "version": "6a939f365bdb03a74b4617bdb4402fc08da088b9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1428c5f1d346a2e1ac9156713975a72246957009"
            },
            {
              "version": "6a939f365bdb03a74b4617bdb4402fc08da088b9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3c3b308ee6e25729a6cf09b69cdd0e093220d40b"
            },
            {
              "version": "6a939f365bdb03a74b4617bdb4402fc08da088b9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "17e73bae400f6a434dc006e3bee92c94cf781954"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.19",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.19"
            },
            {
              "version": "6.6.160",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.113",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.57",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}