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arch/x86/entry/entry_64.S:295\n </TASK>\n================================================================================\n\nThis change limits the maximum timeout by limiting the size of the\nshift, which keeps all intermediate values in-bounds."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mptcp: establece correctamente el tiempo de espera de DATA_FIN cuando el n\u00famero de retransmisiones es grande Syzkaller con UBSAN descubri\u00f3 un escenario en el que una gran cantidad de retransmisiones de DATA_FIN provocaban un desplazamiento fuera de los l\u00edmites en el tiempo de espera de DATA_FIN c\u00e1lculo: =================================================== ================================ UBSAN: desplazamiento fuera de los l\u00edmites en net/mptcp/protocol.c: El exponente de desplazamiento 470:29 32 es demasiado grande para el tipo 'unsigned int' de 32 bits CPU: 1 PID: 13059 Comm: kworker/1:0 Not tainted 5.17.0-rc2-00630-g5fbf21c90c60 #1 Nombre de hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 01/04/2014 Cola de trabajo: eventos mptcp_worker Seguimiento de llamadas: __dump_stack lib/dump_stack.c:88 [en l\u00ednea] dump_stack_lvl+0xcd/0x134 lib/dump_stack .c:106 ubsan_epilogue+0xb/0x5a lib/ubsan.c:151 __ubsan_handle_shift_out_of_bounds.cold+0xb2/0x20e lib/ubsan.c:330 mptcp_set_datafin_timeout net/mptcp/protocol.c:470 __mptcp_retrans.cold+0x7 2/0x77 net/mptcp/protocol.c:2445 mptcp_worker+0x58a/0xa70 net/mptcp/protocol.c:2528 Process_one_work+0x9df/0x16d0 kernel/workqueue.c:2307 trabajador_thread+0x95/0xe10 kernel/workqueue.c:2454 kthread+0x2f4 /0x3b0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ====================== ==================================================== ========= Este cambio limita el tiempo de espera m\u00e1ximo al limitar el tama\u00f1o del turno, lo que mantiene todos los valores intermedios dentro de los 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{"bugzilla": {"description": "kernel: mptcp: Correctly set DATA_FIN timeout when number of retransmits is large", "id": "2307159", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2307159"}, "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"}, "cwe": "CWE-119", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmptcp: Correctly set DATA_FIN timeout when number of retransmits is large\nSyzkaller with UBSAN uncovered a scenario where a large number of\nDATA_FIN retransmits caused a shift-out-of-bounds in the DATA_FIN\ntimeout calculation:\n================================================================================\nUBSAN: shift-out-of-bounds in net/mptcp/protocol.c:470:29\nshift exponent 32 is too large for 32-bit type 'unsigned int'\nCPU: 1 PID: 13059 Comm: kworker/1:0 Not tainted 5.17.0-rc2-00630-g5fbf21c90c60 #1\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014\nWorkqueue: events mptcp_worker\nCall Trace:\n<TASK>\n__dump_stack lib/dump_stack.c:88 [inline]\ndump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\nubsan_epilogue+0xb/0x5a lib/ubsan.c:151\n__ubsan_handle_shift_out_of_bounds.cold+0xb2/0x20e lib/ubsan.c:330\nmptcp_set_datafin_timeout net/mptcp/protocol.c:470 [inline]\n__mptcp_retrans.cold+0x72/0x77 net/mptcp/protocol.c:2445\nmptcp_worker+0x58a/0xa70 net/mptcp/protocol.c:2528\nprocess_one_work+0x9df/0x16d0 kernel/workqueue.c:2307\nworker_thread+0x95/0xe10 kernel/workqueue.c:2454\nkthread+0x2f4/0x3b0 kernel/kthread.c:377\nret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295\n</TASK>\n================================================================================\nThis change limits the maximum timeout by limiting the size of the\nshift, which keeps all intermediate values in-bounds."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2022-48906", "package_state": [{"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": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-08-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-48906\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-48906\nhttps://lore.kernel.org/linux-cve-announce/2024082213-CVE-2022-48906-76db@gregkh/T"], "statement": "Following issue marked as moderate with \"not affected\" for Red Hat Enterprise Linux, as it is not vulnerable to this CVE. This is because the CVE does not impact the versions or configurations of the Linux kernel used in Red Hat's distributions. Additionally, some RHEL versions may be marked as \"will not fix\" due to the minimal impact of the issue, and no fix will be provided.", "threat_severity": "Moderate"}

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