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CVE-2023-53088 (GCVE-0-2023-53088)

Vulnerability from cvelistv5 – Published: 2025-05-02 15:55 – Updated: 2026-08-05 09:12
VLAI
Title
mptcp: fix UaF in listener shutdown
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
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6aeed9045071f2252ff4e98fc13d1e304f33e5b0 , < 5564be74a22a61855f8b8c100d8c4abb003bb792 (git)
Affected: 6aeed9045071f2252ff4e98fc13d1e304f33e5b0 , < 0f4f4cf5d32f10543deb946a37111e714579511e (git)
Affected: 6aeed9045071f2252ff4e98fc13d1e304f33e5b0 , < 0a3f4f1f9c27215e4ddcd312558342e57b93e518 (git)
Affected: a8a3e95c74e48c2c9b07b81fafda9122993f2e12 (git)
Affected: 5.18.10 , < 5.19 (semver)
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Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.22 , ≤ 6.1.* (semver)
Unaffected: 6.2.8 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
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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",
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              "status": "affected",
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              "versionType": "git"
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              "versionType": "git"
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              "version": "5.18.10",
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        {
          "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"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "version": "6.1.22",
              "versionType": "semver"
            },
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              "version": "6.2.8",
              "versionType": "semver"
            },
            {
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      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.22",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
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                {
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                  "versionEndExcluding": "6.2.8",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
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                {
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                  "versionStartIncluding": "5.18.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "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"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is triggered by closing a local MPTCP listening socket that still has unaccepted connections; the entry path is socket/bind/listen/connect/close syscalls, not remote packet processing alone.\nAC:L - The attacker fully controls both the listener and the connecting peer and can force the close path that frees the msk then reuses it; the RCU window is schedulable (mutex between sock_put and inet_csk_listen_stop) and was reliably hit by syzkaller reproducers.\nPR:L - Creating and listening on IPPROTO_MPTCP sockets requires only an unprivileged local account (mptcp enabled by default; no CAP_* on the trigger path), including inside user/net namespaces.\nUI:N - Exploitation uses only the attacker\u0027s own sockets and close(); no victim action is required.\nS:U - This is a same-host kernel memory-corruption privilege-escalation class bug; impact stays within the kernel\u0027s security authority with no VM/IOMMU boundary crossed.\nC:H - The UAF targets a full mptcp/struct sock object in kmalloc-2k; after RCU free the attacker can reclaim and read through the dangling subflow-\u003econn reference.\nI:H - Reclaiming the freed sock enables controlled writes and control-flow hijack via the subsequent subflow_error_report/mptcp_data_lock path on attacker-influenced memory.\nA:H - The UAF already produces a KASAN-detectable kernel write-after-free/oops on the spinlock path, so availability impact is a full kernel crash even without further exploitation."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:12:43.438Z",
        "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",
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  },
  "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": "2026-08-05T09:12:43.438Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-53088",
      "date": "2026-09-15",
      "epss": "0.00196",
      "percentile": "0.09495"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53088\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-02T16:15:27.760\",\"lastModified\":\"2026-08-04T10:18:54.637\",\"vulnStatus\":\"Modified\",\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"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\",\"versions\":[{\"version\":\"6aeed9045071f2252ff4e98fc13d1e304f33e5b0\",\"lessThan\":\"5564be74a22a61855f8b8c100d8c4abb003bb792\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6aeed9045071f2252ff4e98fc13d1e304f33e5b0\",\"lessThan\":\"0f4f4cf5d32f10543deb946a37111e714579511e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6aeed9045071f2252ff4e98fc13d1e304f33e5b0\",\"lessThan\":\"0a3f4f1f9c27215e4ddcd312558342e57b93e518\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a8a3e95c74e48c2c9b07b81fafda9122993f2e12\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.18.10\",\"lessThan\":\"5.19\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"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\",\"versions\":[{\"version\":\"5.19\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.19\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.22\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.2.8\",\"lessThanOrEqual\":\"6.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.3\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.18.10\",\"versionEndExcluding\":\"5.19\",\"matchCriteriaId\":\"A10D4E7E-4972-474E-997B-01A4DD4EB6B8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.19.1\",\"versionEndExcluding\":\"6.1.22\",\"matchCriteriaId\":\"61342A44-98AA-4789-9DE4-4F44CEA19A23\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.2.8\",\"matchCriteriaId\":\"4011EC6B-7786-4709-B765-186FA31D6F7F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"9D759CCF-9E1B-41B2-81AA-CB580C5F3EEC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"1A0DE3B7-0FFB-45AA-9BD6-19870CA7C6FD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"00AE778B-BAEE-49EB-9F84-003B73D7862A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"C178431E-AD82-4B3D-B70F-A273A02ABD5D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc8:*:*:*:*:*:*\",\"matchCriteriaId\":\"2CF5D19C-C418-4B57-B52D-7795547F4096\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B8E3B0E8-FA27-4305-87BB-AF6C25B160CB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"A47F0FC3-CE52-4BA1-BA51-22F783938431\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0a3f4f1f9c27215e4ddcd312558342e57b93e518\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/0f4f4cf5d32f10543deb946a37111e714579511e\",\"sour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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:20:45+00:00",
      "cve": "CVE-2023-53088",
      "id": "CVE-2023-53088",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "120",
      "product_status:known_affected": "124",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mptcp: fix UaF in listener shutdown",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53088.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T01:01:25Z",
      "cve": "CVE-2023-53088",
      "id": "CVE-2023-53088",
      "initial_release_date": "2025-05-03T02:50:56Z",
      "product_status:known_not_affected": "505",
      "product_status:recommended": "49",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53088",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53088.json",
      "version": "12"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.