{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-53088", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-05-02T15:51:43.551Z", "datePublished": "2025-05-02T15:55:34.840Z", "dateUpdated": "2026-05-11T19:38:17.843Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:38:17.843Z"}, "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 <TASK>\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't 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"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/mptcp/protocol.c", "net/mptcp/protocol.h", "net/mptcp/subflow.c"], "versions": [{"version": "6aeed9045071f2252ff4e98fc13d1e304f33e5b0", "lessThan": "5564be74a22a61855f8b8c100d8c4abb003bb792", "status": "affected", "versionType": "git"}, {"version": "6aeed9045071f2252ff4e98fc13d1e304f33e5b0", "lessThan": "0f4f4cf5d32f10543deb946a37111e714579511e", "status": "affected", "versionType": "git"}, {"version": "6aeed9045071f2252ff4e98fc13d1e304f33e5b0", "lessThan": "0a3f4f1f9c27215e4ddcd312558342e57b93e518", "status": "affected", "versionType": "git"}, {"version": "a8a3e95c74e48c2c9b07b81fafda9122993f2e12", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/mptcp/protocol.c", "net/mptcp/protocol.h", "net/mptcp/subflow.c"], "versions": [{"version": "5.19", "status": "affected"}, {"version": "0", "lessThan": "5.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.22", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2.8", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.1.22"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.2.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18.10"}]}]}], "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"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A10D4E7E-4972-474E-997B-01A4DD4EB6B8", "versionEndExcluding": "5.19", "versionStartIncluding": "5.18.10", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "61342A44-98AA-4789-9DE4-4F44CEA19A23", "versionEndExcluding": "6.1.22", "versionStartIncluding": "5.19.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4011EC6B-7786-4709-B765-186FA31D6F7F", "versionEndExcluding": "6.2.8", "versionStartIncluding": "6.2", "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", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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 <TASK>\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't 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."}], "id": "CVE-2023-53088", "lastModified": "2025-11-12T21:06:51.860", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-05-02T16:15:27.760", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0a3f4f1f9c27215e4ddcd312558342e57b93e518"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0f4f4cf5d32f10543deb946a37111e714579511e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5564be74a22a61855f8b8c100d8c4abb003bb792"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: mptcp: fix UaF in listener shutdown", "id": "2363766", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363766"}, "csaw": false, "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": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmptcp: fix UaF in listener shutdown\nAs reported by Christoph after having refactored the passive\nsocket initialization, the mptcp listener shutdown path is prone\nto an UaF issue.\nBUG: KASAN: use-after-free in _raw_spin_lock_bh+0x73/0xe0\nWrite of size 4 at addr ffff88810cb23098 by task syz-executor731/1266\nCPU: 1 PID: 1266 Comm: syz-executor731 Not tainted 6.2.0-rc59af4eaa31c1f6c00c8f1e448ed99a45c66340dd5 #6\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\nCall Trace:\n<TASK>\ndump_stack_lvl+0x6e/0x91\nprint_report+0x16a/0x46f\nkasan_report+0xad/0x130\nkasan_check_range+0x14a/0x1a0\n_raw_spin_lock_bh+0x73/0xe0\nsubflow_error_report+0x6d/0x110\nsk_error_report+0x3b/0x190\ntcp_disconnect+0x138c/0x1aa0\ninet_child_forget+0x6f/0x2e0\ninet_csk_listen_stop+0x209/0x1060\n__mptcp_close_ssk+0x52d/0x610\nmptcp_destroy_common+0x165/0x640\nmptcp_destroy+0x13/0x80\n__mptcp_destroy_sock+0xe7/0x270\n__mptcp_close+0x70e/0x9b0\nmptcp_close+0x2b/0x150\ninet_release+0xe9/0x1f0\n__sock_release+0xd2/0x280\nsock_close+0x15/0x20\n__fput+0x252/0xa20\ntask_work_run+0x169/0x250\nexit_to_user_mode_prepare+0x113/0x120\nsyscall_exit_to_user_mode+0x1d/0x40\ndo_syscall_64+0x48/0x90\nentry_SYSCALL_64_after_hwframe+0x72/0xdc\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()\nAfter the previous patch we don't need anymore special-casing\nmsk listener socket cleanup: the mptcp worker will process each\nof the unaccepted msk sockets.\nJust drop the now unnecessary code.\nPlease note this commit depends on the two parent ones:\nmptcp: refactor passive socket initialization\nmptcp: use the workqueue to destroy unaccepted sockets"], "name": "CVE-2023-53088", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-05-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53088\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53088\nhttps://lore.kernel.org/linux-cve-announce/2025050219-CVE-2023-53088-501c@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-13T11:15:10.170851+00:00", "updated": "2025-07-13T11:15:10.170935+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}