{
  "threat_severity" : "Moderate",
  "public_date" : "2025-05-02T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: mptcp: fix UaF in listener shutdown",
    "id" : "2363766",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2363766"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nmptcp: fix UaF in listener shutdown\nAs reported by Christoph after having refactored the passive\nsocket initialization, the mptcp listener shutdown path is prone\nto an UaF issue.\nBUG: KASAN: use-after-free in _raw_spin_lock_bh+0x73/0xe0\nWrite of size 4 at addr ffff88810cb23098 by task syz-executor731/1266\nCPU: 1 PID: 1266 Comm: syz-executor731 Not tainted 6.2.0-rc59af4eaa31c1f6c00c8f1e448ed99a45c66340dd5 #6\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\nCall Trace:\n<TASK>\ndump_stack_lvl+0x6e/0x91\nprint_report+0x16a/0x46f\nkasan_report+0xad/0x130\nkasan_check_range+0x14a/0x1a0\n_raw_spin_lock_bh+0x73/0xe0\nsubflow_error_report+0x6d/0x110\nsk_error_report+0x3b/0x190\ntcp_disconnect+0x138c/0x1aa0\ninet_child_forget+0x6f/0x2e0\ninet_csk_listen_stop+0x209/0x1060\n__mptcp_close_ssk+0x52d/0x610\nmptcp_destroy_common+0x165/0x640\nmptcp_destroy+0x13/0x80\n__mptcp_destroy_sock+0xe7/0x270\n__mptcp_close+0x70e/0x9b0\nmptcp_close+0x2b/0x150\ninet_release+0xe9/0x1f0\n__sock_release+0xd2/0x280\nsock_close+0x15/0x20\n__fput+0x252/0xa20\ntask_work_run+0x169/0x250\nexit_to_user_mode_prepare+0x113/0x120\nsyscall_exit_to_user_mode+0x1d/0x40\ndo_syscall_64+0x48/0x90\nentry_SYSCALL_64_after_hwframe+0x72/0xdc\nThe msk grace period can legitly expire in between the last\nreference count dropped in mptcp_subflow_queue_clean() and\nthe later eventual access in inet_csk_listen_stop()\nAfter the previous patch we don't need anymore special-casing\nmsk listener socket cleanup: the mptcp worker will process each\nof the unaccepted msk sockets.\nJust drop the now unnecessary code.\nPlease note this commit depends on the two parent ones:\nmptcp: refactor passive socket initialization\nmptcp: use the workqueue to destroy unaccepted sockets" ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-05-22T00:00:00Z",
    "advisory" : "RHSA-2024:3138",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-11-07T00:00:00Z",
    "advisory" : "RHSA-2023:6583",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-362.8.1.el9_3"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-11-07T00:00:00Z",
    "advisory" : "RHSA-2023:6583",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-362.8.1.el9_3"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "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" : "Out of support scope",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2023-53088\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53088\nhttps://lore.kernel.org/linux-cve-announce/2025050219-CVE-2023-53088-501c@gregkh/T" ],
  "name" : "CVE-2023-53088",
  "csaw" : false
}