CVE-2023-53088 (GCVE-0-2023-53088)
Vulnerability from cvelistv5
Published
2025-05-02 15:55
Modified
2025-05-04 12:50
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mptcp: fix UaF in listener shutdown As reported by Christoph after having refactored the passive socket initialization, the mptcp listener shutdown path is prone to an UaF issue. BUG: KASAN: use-after-free in _raw_spin_lock_bh+0x73/0xe0 Write of size 4 at addr ffff88810cb23098 by task syz-executor731/1266 CPU: 1 PID: 1266 Comm: syz-executor731 Not tainted 6.2.0-rc59af4eaa31c1f6c00c8f1e448ed99a45c66340dd5 #6 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x6e/0x91 print_report+0x16a/0x46f kasan_report+0xad/0x130 kasan_check_range+0x14a/0x1a0 _raw_spin_lock_bh+0x73/0xe0 subflow_error_report+0x6d/0x110 sk_error_report+0x3b/0x190 tcp_disconnect+0x138c/0x1aa0 inet_child_forget+0x6f/0x2e0 inet_csk_listen_stop+0x209/0x1060 __mptcp_close_ssk+0x52d/0x610 mptcp_destroy_common+0x165/0x640 mptcp_destroy+0x13/0x80 __mptcp_destroy_sock+0xe7/0x270 __mptcp_close+0x70e/0x9b0 mptcp_close+0x2b/0x150 inet_release+0xe9/0x1f0 __sock_release+0xd2/0x280 sock_close+0x15/0x20 __fput+0x252/0xa20 task_work_run+0x169/0x250 exit_to_user_mode_prepare+0x113/0x120 syscall_exit_to_user_mode+0x1d/0x40 do_syscall_64+0x48/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc The msk grace period can legitly expire in between the last reference count dropped in mptcp_subflow_queue_clean() and the later eventual access in inet_csk_listen_stop() After the previous patch we don't need anymore special-casing msk listener socket cleanup: the mptcp worker will process each of the unaccepted msk sockets. Just drop the now unnecessary code. Please note this commit depends on the two parent ones: mptcp: refactor passive socket initialization mptcp: use the workqueue to destroy unaccepted sockets
References
Impacted products
Vendor Product Version
Linux Linux Version: 6aeed9045071f2252ff4e98fc13d1e304f33e5b0
Version: 6aeed9045071f2252ff4e98fc13d1e304f33e5b0
Version: 6aeed9045071f2252ff4e98fc13d1e304f33e5b0
Version: a8a3e95c74e48c2c9b07b81fafda9122993f2e12
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mptcp/protocol.c",
            "net/mptcp/protocol.h",
            "net/mptcp/subflow.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5564be74a22a61855f8b8c100d8c4abb003bb792",
              "status": "affected",
              "version": "6aeed9045071f2252ff4e98fc13d1e304f33e5b0",
              "versionType": "git"
            },
            {
              "lessThan": "0f4f4cf5d32f10543deb946a37111e714579511e",
              "status": "affected",
              "version": "6aeed9045071f2252ff4e98fc13d1e304f33e5b0",
              "versionType": "git"
            },
            {
              "lessThan": "0a3f4f1f9c27215e4ddcd312558342e57b93e518",
              "status": "affected",
              "version": "6aeed9045071f2252ff4e98fc13d1e304f33e5b0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a8a3e95c74e48c2c9b07b81fafda9122993f2e12",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mptcp/protocol.c",
            "net/mptcp/protocol.h",
            "net/mptcp/subflow.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.19"
            },
            {
              "lessThan": "5.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.22",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.22",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2.8",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.18.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: fix UaF in listener shutdown\n\nAs reported by Christoph after having refactored the passive\nsocket initialization, the mptcp listener shutdown path is prone\nto an UaF issue.\n\n  BUG: KASAN: use-after-free in _raw_spin_lock_bh+0x73/0xe0\n  Write of size 4 at addr ffff88810cb23098 by task syz-executor731/1266\n\n  CPU: 1 PID: 1266 Comm: syz-executor731 Not tainted 6.2.0-rc59af4eaa31c1f6c00c8f1e448ed99a45c66340dd5 #6\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0x6e/0x91\n   print_report+0x16a/0x46f\n   kasan_report+0xad/0x130\n   kasan_check_range+0x14a/0x1a0\n   _raw_spin_lock_bh+0x73/0xe0\n   subflow_error_report+0x6d/0x110\n   sk_error_report+0x3b/0x190\n   tcp_disconnect+0x138c/0x1aa0\n   inet_child_forget+0x6f/0x2e0\n   inet_csk_listen_stop+0x209/0x1060\n   __mptcp_close_ssk+0x52d/0x610\n   mptcp_destroy_common+0x165/0x640\n   mptcp_destroy+0x13/0x80\n   __mptcp_destroy_sock+0xe7/0x270\n   __mptcp_close+0x70e/0x9b0\n   mptcp_close+0x2b/0x150\n   inet_release+0xe9/0x1f0\n   __sock_release+0xd2/0x280\n   sock_close+0x15/0x20\n   __fput+0x252/0xa20\n   task_work_run+0x169/0x250\n   exit_to_user_mode_prepare+0x113/0x120\n   syscall_exit_to_user_mode+0x1d/0x40\n   do_syscall_64+0x48/0x90\n   entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\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()\n\nAfter the previous patch we don\u0027t need anymore special-casing\nmsk listener socket cleanup: the mptcp worker will process each\nof the unaccepted msk sockets.\n\nJust drop the now unnecessary code.\n\nPlease note this commit depends on the two parent ones:\n\n  mptcp: refactor passive socket initialization\n  mptcp: use the workqueue to destroy unaccepted sockets"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T12:50:22.344Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5564be74a22a61855f8b8c100d8c4abb003bb792"
        },
        {
          "url": "https://git.kernel.org/stable/c/0f4f4cf5d32f10543deb946a37111e714579511e"
        },
        {
          "url": "https://git.kernel.org/stable/c/0a3f4f1f9c27215e4ddcd312558342e57b93e518"
        }
      ],
      "title": "mptcp: fix UaF in listener shutdown",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53088",
    "datePublished": "2025-05-02T15:55:34.840Z",
    "dateReserved": "2025-05-02T15:51:43.551Z",
    "dateUpdated": "2025-05-04T12:50:22.344Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53088\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-02T16:15:27.760\",\"lastModified\":\"2025-05-05T20:54:45.973\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmptcp: fix UaF in listener shutdown\\n\\nAs reported by Christoph after having refactored the passive\\nsocket initialization, the mptcp listener shutdown path is prone\\nto an UaF issue.\\n\\n  BUG: KASAN: use-after-free in _raw_spin_lock_bh+0x73/0xe0\\n  Write of size 4 at addr ffff88810cb23098 by task syz-executor731/1266\\n\\n  CPU: 1 PID: 1266 Comm: syz-executor731 Not tainted 6.2.0-rc59af4eaa31c1f6c00c8f1e448ed99a45c66340dd5 #6\\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\\n  Call Trace:\\n   \u003cTASK\u003e\\n   dump_stack_lvl+0x6e/0x91\\n   print_report+0x16a/0x46f\\n   kasan_report+0xad/0x130\\n   kasan_check_range+0x14a/0x1a0\\n   _raw_spin_lock_bh+0x73/0xe0\\n   subflow_error_report+0x6d/0x110\\n   sk_error_report+0x3b/0x190\\n   tcp_disconnect+0x138c/0x1aa0\\n   inet_child_forget+0x6f/0x2e0\\n   inet_csk_listen_stop+0x209/0x1060\\n   __mptcp_close_ssk+0x52d/0x610\\n   mptcp_destroy_common+0x165/0x640\\n   mptcp_destroy+0x13/0x80\\n   __mptcp_destroy_sock+0xe7/0x270\\n   __mptcp_close+0x70e/0x9b0\\n   mptcp_close+0x2b/0x150\\n   inet_release+0xe9/0x1f0\\n   __sock_release+0xd2/0x280\\n   sock_close+0x15/0x20\\n   __fput+0x252/0xa20\\n   task_work_run+0x169/0x250\\n   exit_to_user_mode_prepare+0x113/0x120\\n   syscall_exit_to_user_mode+0x1d/0x40\\n   do_syscall_64+0x48/0x90\\n   entry_SYSCALL_64_after_hwframe+0x72/0xdc\\n\\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()\\n\\nAfter the previous patch we don\u0027t need anymore special-casing\\nmsk listener socket cleanup: the mptcp worker will process each\\nof the unaccepted msk sockets.\\n\\nJust drop the now unnecessary code.\\n\\nPlease note this commit depends on the two parent ones:\\n\\n  mptcp: refactor passive socket initialization\\n  mptcp: use the workqueue to destroy unaccepted sockets\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mptcp: correcci\u00f3n de UaF en el apagado del oyente Como inform\u00f3 Christoph despu\u00e9s de haber refactorizado la inicializaci\u00f3n del socket pasivo, la ruta de apagado del oyente mptcp es propensa a un problema de UaF. ERROR: KASAN: use-after-free en _raw_spin_lock_bh+0x73/0xe0 Escritura de tama\u00f1o 4 en la direcci\u00f3n ffff88810cb23098 por la tarea syz-executor731/1266 CPU: 1 PID: 1266 Comm: syz-executor731 No contaminado 6.2.0-rc59af4eaa31c1f6c00c8f1e448ed99a45c66340dd5 #6 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 01/04/2014 Rastreo de llamadas:  dump_stack_lvl+0x6e/0x91 print_report+0x16a/0x46f kasan_report+0xad/0x130 kasan_check_range+0x14a/0x1a0 _raw_spin_lock_bh+0x73/0xe0 subflow_error_report+0x6d/0x110 sk_error_report+0x3b/0x190 tcp_disconnect+0x138c/0x1aa0 inet_child_forget+0x6f/0x2e0 inet_csk_listen_stop+0x209/0x1060 __mptcp_close_ssk+0x52d/0x610 mptcp_destroy_common+0x165/0x640 mptcp_destroy+0x13/0x80 __mptcp_destroy_sock+0xe7/0x270 __mptcp_close+0x70e/0x9b0 mptcp_close+0x2b/0x150 inet_release+0xe9/0x1f0 __sock_release+0xd2/0x280 sock_close+0x15/0x20 __fput+0x252/0xa20 task_work_run+0x169/0x250 exit_to_user_mode_prepare+0x113/0x120 syscall_exit_to_user_mode+0x1d/0x40 do_syscall_64+0x48/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc puede expirar leg\u00edtimamente entre el \u00faltimo recuento de referencias introducido en mptcp_subflow_queue_clean() y el acceso eventual posterior en inet_csk_listen_stop(). Tras la actualizaci\u00f3n anterior, ya no necesitamos la limpieza de sockets del receptor MSK con casos especiales: el trabajador de mptcp procesar\u00e1 cada uno de los sockets MSK no aceptados. Simplemente elimine el c\u00f3digo innecesario. Tenga en cuenta que esta confirmaci\u00f3n depende de las dos principales: mptcp: refactorizar la inicializaci\u00f3n pasiva de sockets. mptcp: usar la cola de trabajo para eliminar los sockets no aceptados.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0a3f4f1f9c27215e4ddcd312558342e57b93e518\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0f4f4cf5d32f10543deb946a37111e714579511e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5564be74a22a61855f8b8c100d8c4abb003bb792\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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