{
  "threat_severity" : "Moderate",
  "public_date" : "2024-03-18T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: net/sched: act_ct: fix skb leak and crash on ooo frags",
    "id" : "2270080",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2270080"
  },
  "cvss3" : {
    "cvss3_base_score" : "6.4",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-402",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nnet/sched: act_ct: fix skb leak and crash on ooo frags\nact_ct adds skb->users before defragmentation. If frags arrive in order,\nthe last frag's reference is reset in:\ninet_frag_reasm_prepare\nskb_morph\nwhich is not straightforward.\nHowever when frags arrive out of order, nobody unref the last frag, and\nall frags are leaked. The situation is even worse, as initiating packet\ncapture can lead to a crash[0] when skb has been cloned and shared at the\nsame time.\nFix the issue by removing skb_get() before defragmentation. act_ct\nreturns TC_ACT_CONSUMED when defrag failed or in progress.\n[0]:\n[  843.804823] ------------[ cut here ]------------\n[  843.809659] kernel BUG at net/core/skbuff.c:2091!\n[  843.814516] invalid opcode: 0000 [#1] PREEMPT SMP\n[  843.819296] CPU: 7 PID: 0 Comm: swapper/7 Kdump: loaded Tainted: G S 6.7.0-rc3 #2\n[  843.824107] Hardware name: XFUSION 1288H V6/BC13MBSBD, BIOS 1.29 11/25/2022\n[  843.828953] RIP: 0010:pskb_expand_head+0x2ac/0x300\n[  843.833805] Code: 8b 70 28 48 85 f6 74 82 48 83 c6 08 bf 01 00 00 00 e8 38 bd ff ff 8b 83 c0 00 00 00 48 03 83 c8 00 00 00 e9 62 ff ff ff 0f 0b <0f> 0b e8 8d d0 ff ff e9 b3 fd ff ff 81 7c 24 14 40 01 00 00 4c 89\n[  843.843698] RSP: 0018:ffffc9000cce07c0 EFLAGS: 00010202\n[  843.848524] RAX: 0000000000000002 RBX: ffff88811a211d00 RCX: 0000000000000820\n[  843.853299] RDX: 0000000000000640 RSI: 0000000000000000 RDI: ffff88811a211d00\n[  843.857974] RBP: ffff888127d39518 R08: 00000000bee97314 R09: 0000000000000000\n[  843.862584] R10: 0000000000000000 R11: ffff8881109f0000 R12: 0000000000000880\n[  843.867147] R13: ffff888127d39580 R14: 0000000000000640 R15: ffff888170f7b900\n[  843.871680] FS:  0000000000000000(0000) GS:ffff889ffffc0000(0000) knlGS:0000000000000000\n[  843.876242] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  843.880778] CR2: 00007fa42affcfb8 CR3: 000000011433a002 CR4: 0000000000770ef0\n[  843.885336] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[  843.889809] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[  843.894229] PKRU: 55555554\n[  843.898539] Call Trace:\n[  843.902772]  <IRQ>\n[  843.906922]  ? __die_body+0x1e/0x60\n[  843.911032]  ? die+0x3c/0x60\n[  843.915037]  ? do_trap+0xe2/0x110\n[  843.918911]  ? pskb_expand_head+0x2ac/0x300\n[  843.922687]  ? do_error_trap+0x65/0x80\n[  843.926342]  ? pskb_expand_head+0x2ac/0x300\n[  843.929905]  ? exc_invalid_op+0x50/0x60\n[  843.933398]  ? pskb_expand_head+0x2ac/0x300\n[  843.936835]  ? asm_exc_invalid_op+0x1a/0x20\n[  843.940226]  ? pskb_expand_head+0x2ac/0x300\n[  843.943580]  inet_frag_reasm_prepare+0xd1/0x240\n[  843.946904]  ip_defrag+0x5d4/0x870\n[  843.950132]  nf_ct_handle_fragments+0xec/0x130 [nf_conntrack]\n[  843.953334]  tcf_ct_act+0x252/0xd90 [act_ct]\n[  843.956473]  ? tcf_mirred_act+0x516/0x5a0 [act_mirred]\n[  843.959657]  tcf_action_exec+0xa1/0x160\n[  843.962823]  fl_classify+0x1db/0x1f0 [cls_flower]\n[  843.966010]  ? skb_clone+0x53/0xc0\n[  843.969173]  tcf_classify+0x24d/0x420\n[  843.972333]  tc_run+0x8f/0xf0\n[  843.975465]  __netif_receive_skb_core+0x67a/0x1080\n[  843.978634]  ? dev_gro_receive+0x249/0x730\n[  843.981759]  __netif_receive_skb_list_core+0x12d/0x260\n[  843.984869]  netif_receive_skb_list_internal+0x1cb/0x2f0\n[  843.987957]  ? mlx5e_handle_rx_cqe_mpwrq_rep+0xfa/0x1a0 [mlx5_core]\n[  843.991170]  napi_complete_done+0x72/0x1a0\n[  843.994305]  mlx5e_napi_poll+0x28c/0x6d0 [mlx5_core]\n[  843.997501]  __napi_poll+0x25/0x1b0\n[  844.000627]  net_rx_action+0x256/0x330\n[  844.003705]  __do_softirq+0xb3/0x29b\n[  844.006718]  irq_exit_rcu+0x9e/0xc0\n[  844.009672]  common_interrupt+0x86/0xa0\n[  844.012537]  </IRQ>\n[  844.015285]  <TASK>\n[  844.017937]  asm_common_interrupt+0x26/0x40\n[  844.020591] RIP: 0010:acpi_safe_halt+0x1b/0x20\n[  844.023247] Code: ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 65 48 8b 04 25 00 18 03 00 48 8b 00 a8 08 75 0c 66 90 0f 00 2d 81 d0 44 00 fb\n---truncated---", "A memory leak flaw and potential kernel crash were found in the Linux kernel’s Conntrack module. This issue occurs when Conntrack is being used by a local user for a specific configuration, and both fragmented packets are received remotely and out of order. This flaw allows a local or remote user to crash or potentially escalate their privileges on the system." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-06-05T00:00:00Z",
    "advisory" : "RHSA-2024:3627",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-553.5.1.rt7.346.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-06-05T00:00:00Z",
    "advisory" : "RHSA-2024:3618",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.5.1.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
    "release_date" : "2024-08-21T00:00:00Z",
    "advisory" : "RHSA-2024:5692",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.6",
    "package" : "kernel-0:4.18.0-372.119.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Telecommunications Update Service",
    "release_date" : "2024-08-21T00:00:00Z",
    "advisory" : "RHSA-2024:5692",
    "cpe" : "cpe:/o:redhat:rhel_tus:8.6",
    "package" : "kernel-0:4.18.0-372.119.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions",
    "release_date" : "2024-08-21T00:00:00Z",
    "advisory" : "RHSA-2024:5692",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.6",
    "package" : "kernel-0:4.18.0-372.119.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.8 Extended Update Support",
    "release_date" : "2024-08-13T00:00:00Z",
    "advisory" : "RHSA-2024:5255",
    "cpe" : "cpe:/o:redhat:rhel_eus:8.8",
    "package" : "kernel-0:4.18.0-477.67.1.el8_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-04-30T00:00:00Z",
    "advisory" : "RHSA-2024:2394",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-427.13.1.el9_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-04-30T00:00:00Z",
    "advisory" : "RHSA-2024:2394",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-427.13.1.el9_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions",
    "release_date" : "2025-12-10T00:00:00Z",
    "advisory" : "RHSA-2025:22999",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.0",
    "package" : "kernel-0:5.14.0-70.157.1.el9_0"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions",
    "release_date" : "2025-12-10T00:00:00Z",
    "advisory" : "RHSA-2025:22997",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.0::nfv",
    "package" : "kernel-rt-0:5.14.0-70.157.1.rt21.229.el9_0"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
    "release_date" : "2025-11-25T00:00:00Z",
    "advisory" : "RHSA-2025:22095",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.2",
    "package" : "kernel-0:5.14.0-284.148.1.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
    "release_date" : "2025-11-25T00:00:00Z",
    "advisory" : "RHSA-2025:22124",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.2::nfv",
    "package" : "kernel-rt-0:5.14.0-284.148.1.rt14.433.el9_2"
  } ],
  "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 9",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2023-52610\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52610\nhttps://lore.kernel.org/linux-cve-announce/20240318100758.2828621-10-lee@kernel.org/T" ],
  "name" : "CVE-2023-52610",
  "mitigation" : {
    "value" : "To mitigate this issue, prevent the Conntrack module from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from loading automatically.",
    "lang" : "en:us"
  },
  "csaw" : false
}