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CVE-2023-54176

Estado: AplazadaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

mptcp: stricter state check in mptcp_worker

As reported by Christoph, the mptcp protocol can run the worker when the relevant msk socket is in an unexpected state:

connect() // incoming reset + fastclose // the mptcp worker is scheduled mptcp_disconnect() // msk is now CLOSED listen() mptcp_worker()

Leading to the following splat:

This change addresses the issue explicitly checking for bad states before running the mptcp worker.

Detalles técnicos trazas, registros y código del informe original
divide error: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 21 Comm: kworker/1:0 Not tainted 6.3.0-rc1-gde5e8fd0123c #11
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 04/01/2014
Workqueue: events mptcp_worker
RIP: 0010:__tcp_select_window+0x22c/0x4b0 net/ipv4/tcp_output.c:3018
RSP: 0018:ffffc900000b3c98 EFLAGS: 00010293
RAX: 000000000000ffd7 RBX: 000000000000ffd7 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8214ce97 RDI: 0000000000000004
RBP: 000000000000ffd7 R08: 0000000000000004 R09: 0000000000010000
R10: 000000000000ffd7 R11: ffff888005afa148 R12: 000000000000ffd7
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88803ed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000405270 CR3: 000000003011e006 CR4: 0000000000370ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 tcp_select_window net/ipv4/tcp_output.c:262 [inline]
 __tcp_transmit_skb+0x356/0x1280 net/ipv4/tcp_output.c:1345
 tcp_transmit_skb net/ipv4/tcp_output.c:1417 [inline]
 tcp_send_active_reset+0x13e/0x320 net/ipv4/tcp_output.c:3459
 mptcp_check_fastclose net/mptcp/protocol.c:2530 [inline]
 mptcp_worker+0x6c7/0x800 net/mptcp/protocol.c:2705
 process_one_work+0x3bd/0x950 kernel/workqueue.c:2390
 worker_thread+0x5b/0x610 kernel/workqueue.c:2537
 kthread+0x138/0x170 kernel/kthread.c:376
 ret_from_fork+0x2c/0x50 arch/x86/entry/entry_64.S:308
 </TASK>

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2023-54176",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "e16163b6e2b720fb74e5af758546f6dad27e6c9e",
              "lessThan": "f0b4a4086cf27240fc621a560da9735159049dcc",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e16163b6e2b720fb74e5af758546f6dad27e6c9e",
              "lessThan": "aff9099e9c51f15c8def05c75b2b73e8487b5d54",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e16163b6e2b720fb74e5af758546f6dad27e6c9e",
              "lessThan": "19ea79e87af32c2b3c6fc49bd84efeb35ca57678",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e16163b6e2b720fb74e5af758546f6dad27e6c9e",
              "lessThan": "d6a0443733434408f2cbd4c53fea6910599bab9e",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/mptcp/protocol.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.11"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.11",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.15.108",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.25",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.2.12",
              "versionType": "semver",
              "lessThanOrEqual": "6.2.*"
            },
            {
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/mptcp/protocol.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-30T13:16:05.470",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/19ea79e87af32c2b3c6fc49bd84efeb35ca57678",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/aff9099e9c51f15c8def05c75b2b73e8487b5d54",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d6a0443733434408f2cbd4c53fea6910599bab9e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f0b4a4086cf27240fc621a560da9735159049dcc",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: stricter state check in mptcp_worker\n\nAs reported by Christoph, the mptcp protocol can run the\nworker when the relevant msk socket is in an unexpected state:\n\nconnect()\n// incoming reset + fastclose\n// the mptcp worker is scheduled\nmptcp_disconnect()\n// msk is now CLOSED\nlisten()\nmptcp_worker()\n\nLeading to the following splat:\n\ndivide error: 0000 [#1] PREEMPT SMP\nCPU: 1 PID: 21 Comm: kworker/1:0 Not tainted 6.3.0-rc1-gde5e8fd0123c #11\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 04/01/2014\nWorkqueue: events mptcp_worker\nRIP: 0010:__tcp_select_window+0x22c/0x4b0 net/ipv4/tcp_output.c:3018\nRSP: 0018:ffffc900000b3c98 EFLAGS: 00010293\nRAX: 000000000000ffd7 RBX: 000000000000ffd7 RCX: 0000000000000000\nRDX: 0000000000000000 RSI: ffffffff8214ce97 RDI: 0000000000000004\nRBP: 000000000000ffd7 R08: 0000000000000004 R09: 0000000000010000\nR10: 000000000000ffd7 R11: ffff888005afa148 R12: 000000000000ffd7\nR13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\nFS:  0000000000000000(0000) GS:ffff88803ed00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000405270 CR3: 000000003011e006 CR4: 0000000000370ee0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n tcp_select_window net/ipv4/tcp_output.c:262 [inline]\n __tcp_transmit_skb+0x356/0x1280 net/ipv4/tcp_output.c:1345\n tcp_transmit_skb net/ipv4/tcp_output.c:1417 [inline]\n tcp_send_active_reset+0x13e/0x320 net/ipv4/tcp_output.c:3459\n mptcp_check_fastclose net/mptcp/protocol.c:2530 [inline]\n mptcp_worker+0x6c7/0x800 net/mptcp/protocol.c:2705\n process_one_work+0x3bd/0x950 kernel/workqueue.c:2390\n worker_thread+0x5b/0x610 kernel/workqueue.c:2537\n kthread+0x138/0x170 kernel/kthread.c:376\n ret_from_fork+0x2c/0x50 arch/x86/entry/entry_64.S:308\n </TASK>\n\nThis change addresses the issue explicitly checking for bad states\nbefore running the mptcp worker."
    }
  ],
  "lastModified": "2026-06-17T06:46:56.603",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}