CVE-2024-36905
Estado: ModificadaMedia (5.5)—
Detalles técnicos trazas, registros y código del informe original
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tcp: diferir apagado (SEND_SHUTDOWN) para sockets TCP_SYN_RECV El estado TCP_SYN_RECV es realmente especial, solo lo usan conexiones cross-syn, principalmente usado por fuzzers. En el siguiente fallo [1], syzbot logró activar una división por cero en tcp_rcv_space_adjust(). Un socket realiza las siguientes transiciones de estado, sin siquiera llamar a tcp_init_transfer(), lo que significa que tampoco se llama a tcp_init_buffer_space(). TCP_CLOSE connect() TCP_SYN_SENT TCP_SYN_RECV Shutdown() -> tcp_shutdown(sk, SEND_SHUTDOWN) TCP_FIN_WAIT1 Para solucionar este problema, cambie tcp_shutdown() para no realizar una transición TCP_SYN_RECV -> TCP_FIN_WAIT1, lo que de todos modos no tiene sentido. Cuando tcp_rcv_state_process() luego cambie el estado del socket de TCP_SYN_RECV a TCP_ESTABLISH, mire sk->sk_shutdown para finalmente ingresar al estado TCP_FIN_WAIT1 y envíe un paquete FIN desde un estado de socket sano. Esto significa que ahora se puede llamar a tcp_send_fin() desde el contexto BH y debe usar asignaciones GFP_ATOMIC. [1] error de división: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 1 PID: 5084 Comm: syz-executor358 No contaminado 6.9.0-rc6-syzkaller-00022-g98369dccd2f8 #0 Nombre de hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 27/03/2024 RIP: 0010:tcp_rcv_space_adjust+0x2df/0x890 net/ipv4/tcp_input.c:767 Código: e3 04 4c 01 eb 48 8b 44 24 38 0f b6 04 10 84 c0 49 89 d5 f 85 a5 03 00 00 41 8b 8e c8 09 00 00 89 e8 29 c8 48 0f c3 31 d2 <48> f7 f1 48 8d 1c 43 49 8d 96 76 08 00 00 48 89 d0 48 c1 e8 03 48 : 0018: ffffc900031ef3f0 EFLAGS: 00010246 RAX: 0c677a10441f8f42 RBX: 000000004fb95e7e RCX: 0000000000000000 RDX: 0000000000000000 RSI: 000000000 0000000 RDI: 0000000000000000 RBP: 0000000027d4b11f R08: ffffffff89e535a4 R09: 1ffffffff25e6ab7 R10: dffffc0000000000 R11: ffffffff8135e920 R12: 802a9f8d30 R13: dffffc0000000000 R14: ffff88802a9f8d00 R15: 1ffff1100553f2da FS : 00005555775c0380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: f2304 CR3: 000000002b9f2000 CR4: 0000000000350ef0 Seguimiento de llamadas: tcp_recvmsg_locked+0x106d/0x25a0 net/ipv4/ tcp.c:2513 tcp_recvmsg+0x25d/0x920 net/ipv4/tcp.c:2578 inet6_recvmsg+0x16a/0x730 net/ipv6/af_inet6.c:680 sock_recvmsg_nosec net/socket.c:1046 [en línea] +0x109/0x280 neto /socket.c:1068 ____sys_recvmsg+0x1db/0x470 net/socket.c:2803 ___sys_recvmsg net/socket.c:2845 [en línea] do_recvmmsg+0x474/0xae0 net/socket.c:2939 __sys_recvmmsg net/socket.c:3018 [ en línea] __do_sys_recvmmsg net/socket.c:3041 [en línea] __se_sys_recvmmsg net/socket.c:3034 [en línea] __x64_sys_recvmmsg+0x199/0x250 net/socket.c:3034 do_syscall_x64 arch/x86/entry/common.c :52 [en línea ] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7faeb6363db9 Código: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP:00 007ffcc1997168 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007faeb6363db9 RDX: 0000000000000001 RSI: 00000000200 00bc0 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000001c R10: 0000000000000122 R11: 000000000000 0246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.33%
- Percentil entre todas las CVEs puntuadas: 24
- Fecha de la puntuación: 8/10/2026
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 (2)
CWE
- CWE-369
Referencias
- https://git.kernel.org/stable/c/2552c9d9440f8e7a2ed0660911ff00f25b90a0a4
- https://git.kernel.org/stable/c/34e41a031fd7523bf1cd00a2adca2370aebea270
- https://git.kernel.org/stable/c/3fe4ef0568a48369b1891395d13ac593b1ba41b1
- https://git.kernel.org/stable/c/413c33b9f3bc36fdf719690a78824db9f88a9485
- https://git.kernel.org/stable/c/94062790aedb505bdda209b10bea47b294d6394f
- https://git.kernel.org/stable/c/cbf232ba11bc86a5281b4f00e1151349ef4d45cf
- https://git.kernel.org/stable/c/ed5e279b69e007ce6c0fe82a5a534c1b19783214
- https://git.kernel.org/stable/c/f47d0d32fa94e815fdd78b8b88684873e67939f4
- https://www.openwall.com/lists/oss-security/2024/10/29/1
- http://www.openwall.com/lists/oss-security/2024/10/29/1
- http://www.openwall.com/lists/oss-security/2024/10/30/1
- http://www.openwall.com/lists/oss-security/2024/11/12/4
- http://www.openwall.com/lists/oss-security/2024/11/12/5
- http://www.openwall.com/lists/oss-security/2024/11/12/6
- https://git.kernel.org/stable/c/2552c9d9440f8e7a2ed0660911ff00f25b90a0a4
- https://git.kernel.org/stable/c/34e41a031fd7523bf1cd00a2adca2370aebea270
- https://git.kernel.org/stable/c/3fe4ef0568a48369b1891395d13ac593b1ba41b1
- https://git.kernel.org/stable/c/413c33b9f3bc36fdf719690a78824db9f88a9485
- https://git.kernel.org/stable/c/94062790aedb505bdda209b10bea47b294d6394f
- https://git.kernel.org/stable/c/cbf232ba11bc86a5281b4f00e1151349ef4d45cf
- https://git.kernel.org/stable/c/ed5e279b69e007ce6c0fe82a5a534c1b19783214
- https://git.kernel.org/stable/c/f47d0d32fa94e815fdd78b8b88684873e67939f4
- https://lists.debian.org/debian-lts-announce/2024/06/msg00019.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://security.netapp.com/advisory/ntap-20240905-0005/
- https://access.redhat.com/security/cve/cve-2024-36905
- https://alas.aws.amazon.com/cve/html/CVE-2024-36905.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-613116.html
- https://github.com/cisagov/vulnrichment/issues/130
- https://www.openwall.com/lists/oss-security/2024/11/12/4
JSON original (NVD)
Mostrar
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets\n\nTCP_SYN_RECV state is really special, it is only used by\ncross-syn connections, mostly used by fuzzers.\n\nIn the following crash [1], syzbot managed to trigger a divide\nby zero in tcp_rcv_space_adjust()\n\nA socket makes the following state transitions,\nwithout ever calling tcp_init_transfer(),\nmeaning tcp_init_buffer_space() is also not called.\n\n TCP_CLOSE\nconnect()\n TCP_SYN_SENT\n TCP_SYN_RECV\nshutdown() -> tcp_shutdown(sk, SEND_SHUTDOWN)\n TCP_FIN_WAIT1\n\nTo fix this issue, change tcp_shutdown() to not\nperform a TCP_SYN_RECV -> TCP_FIN_WAIT1 transition,\nwhich makes no sense anyway.\n\nWhen tcp_rcv_state_process() later changes socket state\nfrom TCP_SYN_RECV to TCP_ESTABLISH, then look at\nsk->sk_shutdown to finally enter TCP_FIN_WAIT1 state,\nand send a FIN packet from a sane socket state.\n\nThis means tcp_send_fin() can now be called from BH\ncontext, and must use GFP_ATOMIC allocations.\n\n[1]\ndivide error: 0000 [#1] PREEMPT SMP KASAN NOPTI\nCPU: 1 PID: 5084 Comm: syz-executor358 Not tainted 6.9.0-rc6-syzkaller-00022-g98369dccd2f8 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\n RIP: 0010:tcp_rcv_space_adjust+0x2df/0x890 net/ipv4/tcp_input.c:767\nCode: e3 04 4c 01 eb 48 8b 44 24 38 0f b6 04 10 84 c0 49 89 d5 0f 85 a5 03 00 00 41 8b 8e c8 09 00 00 89 e8 29 c8 48 0f af c3 31 d2 <48> f7 f1 48 8d 1c 43 49 8d 96 76 08 00 00 48 89 d0 48 c1 e8 03 48\nRSP: 0018:ffffc900031ef3f0 EFLAGS: 00010246\nRAX: 0c677a10441f8f42 RBX: 000000004fb95e7e RCX: 0000000000000000\nRDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000\nRBP: 0000000027d4b11f R08: ffffffff89e535a4 R09: 1ffffffff25e6ab7\nR10: dffffc0000000000 R11: ffffffff8135e920 R12: ffff88802a9f8d30\nR13: dffffc0000000000 R14: ffff88802a9f8d00 R15: 1ffff1100553f2da\nFS: 00005555775c0380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f1155bf2304 CR3: 000000002b9f2000 CR4: 0000000000350ef0\nCall Trace:\n <TASK>\n tcp_recvmsg_locked+0x106d/0x25a0 net/ipv4/tcp.c:2513\n tcp_recvmsg+0x25d/0x920 net/ipv4/tcp.c:2578\n inet6_recvmsg+0x16a/0x730 net/ipv6/af_inet6.c:680\n sock_recvmsg_nosec net/socket.c:1046 [inline]\n sock_recvmsg+0x109/0x280 net/socket.c:1068\n ____sys_recvmsg+0x1db/0x470 net/socket.c:2803\n ___sys_recvmsg net/socket.c:2845 [inline]\n do_recvmmsg+0x474/0xae0 net/socket.c:2939\n __sys_recvmmsg net/socket.c:3018 [inline]\n __do_sys_recvmmsg net/socket.c:3041 [inline]\n __se_sys_recvmmsg net/socket.c:3034 [inline]\n __x64_sys_recvmmsg+0x199/0x250 net/socket.c:3034\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7faeb6363db9\nCode: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007ffcc1997168 EFLAGS: 00000246 ORIG_RAX: 000000000000012b\nRAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007faeb6363db9\nRDX: 0000000000000001 RSI: 0000000020000bc0 RDI: 0000000000000005\nRBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000001c\nR10: 0000000000000122 R11: 0000000000000246 R12: 0000000000000000\nR13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tcp: diferir apagado (SEND_SHUTDOWN) para sockets TCP_SYN_RECV El estado TCP_SYN_RECV es realmente especial, solo lo usan conexiones cross-syn, principalmente usado por fuzzers. En el siguiente fallo [1], syzbot logró activar una división por cero en tcp_rcv_space_adjust(). Un socket realiza las siguientes transiciones de estado, sin siquiera llamar a tcp_init_transfer(), lo que significa que tampoco se llama a tcp_init_buffer_space(). TCP_CLOSE connect() TCP_SYN_SENT TCP_SYN_RECV Shutdown() -> tcp_shutdown(sk, SEND_SHUTDOWN) TCP_FIN_WAIT1 Para solucionar este problema, cambie tcp_shutdown() para no realizar una transición TCP_SYN_RECV -> TCP_FIN_WAIT1, lo que de todos modos no tiene sentido. Cuando tcp_rcv_state_process() luego cambie el estado del socket de TCP_SYN_RECV a TCP_ESTABLISH, mire sk->sk_shutdown para finalmente ingresar al estado TCP_FIN_WAIT1 y envíe un paquete FIN desde un estado de socket sano. Esto significa que ahora se puede llamar a tcp_send_fin() desde el contexto BH y debe usar asignaciones GFP_ATOMIC. [1] error de división: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 1 PID: 5084 Comm: syz-executor358 No contaminado 6.9.0-rc6-syzkaller-00022-g98369dccd2f8 #0 Nombre de hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 27/03/2024 RIP: 0010:tcp_rcv_space_adjust+0x2df/0x890 net/ipv4/tcp_input.c:767 Código: e3 04 4c 01 eb 48 8b 44 24 38 0f b6 04 10 84 c0 49 89 d5 f 85 a5 03 00 00 41 8b 8e c8 09 00 00 89 e8 29 c8 48 0f c3 31 d2 <48> f7 f1 48 8d 1c 43 49 8d 96 76 08 00 00 48 89 d0 48 c1 e8 03 48 : 0018: ffffc900031ef3f0 EFLAGS: 00010246 RAX: 0c677a10441f8f42 RBX: 000000004fb95e7e RCX: 0000000000000000 RDX: 0000000000000000 RSI: 000000000 0000000 RDI: 0000000000000000 RBP: 0000000027d4b11f R08: ffffffff89e535a4 R09: 1ffffffff25e6ab7 R10: dffffc0000000000 R11: ffffffff8135e920 R12: 802a9f8d30 R13: dffffc0000000000 R14: ffff88802a9f8d00 R15: 1ffff1100553f2da FS : 00005555775c0380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: f2304 CR3: 000000002b9f2000 CR4: 0000000000350ef0 Seguimiento de llamadas: tcp_recvmsg_locked+0x106d/0x25a0 net/ipv4/ tcp.c:2513 tcp_recvmsg+0x25d/0x920 net/ipv4/tcp.c:2578 inet6_recvmsg+0x16a/0x730 net/ipv6/af_inet6.c:680 sock_recvmsg_nosec net/socket.c:1046 [en línea] +0x109/0x280 neto /socket.c:1068 ____sys_recvmsg+0x1db/0x470 net/socket.c:2803 ___sys_recvmsg net/socket.c:2845 [en línea] do_recvmmsg+0x474/0xae0 net/socket.c:2939 __sys_recvmmsg net/socket.c:3018 [ en línea] __do_sys_recvmmsg net/socket.c:3041 [en línea] __se_sys_recvmmsg net/socket.c:3034 [en línea] __x64_sys_recvmmsg+0x199/0x250 net/socket.c:3034 do_syscall_x64 arch/x86/entry/common.c :52 [en línea ] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7faeb6363db9 Código: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP:00 007ffcc1997168 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007faeb6363db9 RDX: 0000000000000001 RSI: 00000000200 00bc0 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000001c R10: 0000000000000122 R11: 000000000000 0246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001"
}
],
"lastModified": "2026-06-17T07:37:19.600",
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