{
  "threat_severity" : "Moderate",
  "public_date" : "2025-02-26T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: rxrpc: fix a race in rxrpc_exit_net()",
    "id" : "2348272",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2348272"
  },
  "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:\nrxrpc: fix a race in rxrpc_exit_net()\nCurrent code can lead to the following race:\nCPU0                                                 CPU1\nrxrpc_exit_net()\nrxrpc_peer_keepalive_worker()\nif (rxnet->live)\nrxnet->live = false;\ndel_timer_sync(&rxnet->peer_keepalive_timer);\ntimer_reduce(&rxnet->peer_keepalive_timer, jiffies + delay);\ncancel_work_sync(&rxnet->peer_keepalive_work);\nrxrpc_exit_net() exits while peer_keepalive_timer is still armed,\nleading to use-after-free.\nsyzbot report was:\nODEBUG: free active (active state 0) object type: timer_list hint: rxrpc_peer_keepalive_timeout+0x0/0xb0\nWARNING: CPU: 0 PID: 3660 at lib/debugobjects.c:505 debug_print_object+0x16e/0x250 lib/debugobjects.c:505\nModules linked in:\nCPU: 0 PID: 3660 Comm: kworker/u4:6 Not tainted 5.17.0-syzkaller-13993-g88e6c0207623 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nWorkqueue: netns cleanup_net\nRIP: 0010:debug_print_object+0x16e/0x250 lib/debugobjects.c:505\nCode: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 af 00 00 00 48 8b 14 dd 00 1c 26 8a 4c 89 ee 48 c7 c7 00 10 26 8a e8 b1 e7 28 05 <0f> 0b 83 05 15 eb c5 09 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3\nRSP: 0018:ffffc9000353fb00 EFLAGS: 00010082\nRAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000\nRDX: ffff888029196140 RSI: ffffffff815efad8 RDI: fffff520006a7f52\nRBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000\nR10: ffffffff815ea4ae R11: 0000000000000000 R12: ffffffff89ce23e0\nR13: ffffffff8a2614e0 R14: ffffffff816628c0 R15: dffffc0000000000\nFS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007fe1f2908924 CR3: 0000000043720000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n<TASK>\n__debug_check_no_obj_freed lib/debugobjects.c:992 [inline]\ndebug_check_no_obj_freed+0x301/0x420 lib/debugobjects.c:1023\nkfree+0xd6/0x310 mm/slab.c:3809\nops_free_list.part.0+0x119/0x370 net/core/net_namespace.c:176\nops_free_list net/core/net_namespace.c:174 [inline]\ncleanup_net+0x591/0xb00 net/core/net_namespace.c:598\nprocess_one_work+0x996/0x1610 kernel/workqueue.c:2289\nworker_thread+0x665/0x1080 kernel/workqueue.c:2436\nkthread+0x2e9/0x3a0 kernel/kthread.c:376\nret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298\n</TASK>" ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-05-09T00:00:00Z",
    "advisory" : "RHSA-2023:2458",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-284.11.1.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-05-09T00:00:00Z",
    "advisory" : "RHSA-2023:2458",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-284.11.1.el9_2"
  } ],
  "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" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not 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-2022-49087\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49087\nhttps://lore.kernel.org/linux-cve-announce/2025022658-CVE-2022-49087-1127@gregkh/T" ],
  "name" : "CVE-2022-49087",
  "csaw" : false
}