{
  "threat_severity" : "Moderate",
  "public_date" : "2024-09-27T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: mptcp: pm: Fix uaf in __timer_delete_sync",
    "id" : "2315210",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2315210"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.0",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-416",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nmptcp: pm: Fix uaf in __timer_delete_sync\nThere are two paths to access mptcp_pm_del_add_timer, result in a race\ncondition:\nCPU1CPU2\n====                               ====\nnet_rx_action\nnapi_poll                          netlink_sendmsg\n__napi_poll                        netlink_unicast\nprocess_backlog                    netlink_unicast_kernel\n__netif_receive_skb                genl_rcv\n__netif_receive_skb_one_core       netlink_rcv_skb\nNF_HOOK                            genl_rcv_msg\nip_local_deliver_finish            genl_family_rcv_msg\nip_protocol_deliver_rcu            genl_family_rcv_msg_doit\ntcp_v4_rcv                         mptcp_pm_nl_flush_addrs_doit\ntcp_v4_do_rcv                      mptcp_nl_remove_addrs_list\ntcp_rcv_established                mptcp_pm_remove_addrs_and_subflows\ntcp_data_queue                     remove_anno_list_by_saddr\nmptcp_incoming_options             mptcp_pm_del_add_timer\nmptcp_pm_del_add_timer             kfree(entry)\nIn remove_anno_list_by_saddr(running on CPU2), after leaving the critical\nzone protected by \"pm.lock\", the entry will be released, which leads to the\noccurrence of uaf in the mptcp_pm_del_add_timer(running on CPU1).\nKeeping a reference to add_timer inside the lock, and calling\nsk_stop_timer_sync() with this reference, instead of \"entry->add_timer\".\nMove list_del(&entry->list) to mptcp_pm_del_add_timer and inside the pm lock,\ndo not directly access any members of the entry outside the pm lock, which\ncan avoid similar \"entry->x\" uaf.", "A use-after-free flaw was found in the Linux kernel’s Multipath TCP (MPTCP) subsystem. This flaw allows a local user to crash or potentially escalate their privileges on the system." ],
  "statement" : "Actual only for latest version of Red Hat Enterprise Linux 9 and latest version of Red Hat Enterprise Linux 8.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-11-26T00:00:00Z",
    "advisory" : "RHSA-2024:10281",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.30.1.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
    "release_date" : "2024-11-26T00:00:00Z",
    "advisory" : "RHSA-2024:10265",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.4",
    "package" : "kernel-0:4.18.0-305.145.1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Telecommunications Update Service",
    "release_date" : "2024-11-26T00:00:00Z",
    "advisory" : "RHSA-2024:10265",
    "cpe" : "cpe:/o:redhat:rhel_tus:8.4",
    "package" : "kernel-0:4.18.0-305.145.1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions",
    "release_date" : "2024-11-26T00:00:00Z",
    "advisory" : "RHSA-2024:10265",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.4",
    "package" : "kernel-0:4.18.0-305.145.1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
    "release_date" : "2024-11-13T00:00:00Z",
    "advisory" : "RHSA-2024:9500",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.6",
    "package" : "kernel-0:4.18.0-372.129.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Telecommunications Update Service",
    "release_date" : "2024-11-13T00:00:00Z",
    "advisory" : "RHSA-2024:9500",
    "cpe" : "cpe:/o:redhat:rhel_tus:8.6",
    "package" : "kernel-0:4.18.0-372.129.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions",
    "release_date" : "2024-11-13T00:00:00Z",
    "advisory" : "RHSA-2024:9500",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.6",
    "package" : "kernel-0:4.18.0-372.129.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.8 Extended Update Support",
    "release_date" : "2024-11-26T00:00:00Z",
    "advisory" : "RHSA-2024:10262",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.8",
    "package" : "kernel-0:4.18.0-477.81.1.el8_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-11-14T00:00:00Z",
    "advisory" : "RHSA-2024:9605",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-503.14.1.el9_5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-11-14T00:00:00Z",
    "advisory" : "RHSA-2024:9605",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-503.14.1.el9_5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions",
    "release_date" : "2024-11-19T00:00:00Z",
    "advisory" : "RHSA-2024:9942",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.0",
    "package" : "kernel-0:5.14.0-70.121.1.el9_0"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions",
    "release_date" : "2024-11-19T00:00:00Z",
    "advisory" : "RHSA-2024:9943",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.0::nfv",
    "package" : "kernel-rt-0:5.14.0-70.121.1.rt21.193.el9_0"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Extended Update Support",
    "release_date" : "2024-11-13T00:00:00Z",
    "advisory" : "RHSA-2024:9497",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.2",
    "package" : "kernel-0:5.14.0-284.92.1.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Extended Update Support",
    "release_date" : "2024-11-13T00:00:00Z",
    "advisory" : "RHSA-2024:9498",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.2::nfv",
    "package" : "kernel-rt-0:5.14.0-284.92.1.rt14.377.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.4 Extended Update Support",
    "release_date" : "2024-11-13T00:00:00Z",
    "advisory" : "RHSA-2024:9546",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.4",
    "package" : "kernel-0:5.14.0-427.44.1.el9_4"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2024-46858\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-46858\nhttps://lore.kernel.org/linux-cve-announce/2024092744-CVE-2024-46858-dab6@gregkh/T" ],
  "name" : "CVE-2024-46858",
  "csaw" : false
}