CVE-2025-40357
Estado: AplazadaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
net/smc: fix general protection fault in __smc_diag_dump
The syzbot report a crash:
The process like this:
With CONFIG_DEBUG_LOCK_ALLOC=y, the smc->clcsock is unexpectedly changed in inet_init_csk_locks(). The INET_PROTOSW_ICSK flag is no need by smc, just remove it.
After removing the INET_PROTOSW_ICSK flag, this patch alse revert commit 6fd27ea183c2 ("net/smc: fix lacks of icsk_syn_mss with IPPROTO_SMC") to avoid casting smc_sock to inet_connection_sock.
Detalles técnicos trazas, registros y código del informe original
Oops: general protection fault, probably for non-canonical address 0xfbd5a5d5a0000003: 0000 [#1] SMP KASAN NOPTI
KASAN: maybe wild-memory-access in range [0xdead4ead00000018-0xdead4ead0000001f]
CPU: 1 UID: 0 PID: 6949 Comm: syz.0.335 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:smc_diag_msg_common_fill net/smc/smc_diag.c:44 [inline]
RIP: 0010:__smc_diag_dump.constprop.0+0x3ca/0x2550 net/smc/smc_diag.c:89
Call Trace:
<TASK>
smc_diag_dump_proto+0x26d/0x420 net/smc/smc_diag.c:217
smc_diag_dump+0x27/0x90 net/smc/smc_diag.c:234
netlink_dump+0x539/0xd30 net/netlink/af_netlink.c:2327
__netlink_dump_start+0x6d6/0x990 net/netlink/af_netlink.c:2442
netlink_dump_start include/linux/netlink.h:341 [inline]
smc_diag_handler_dump+0x1f9/0x240 net/smc/smc_diag.c:251
__sock_diag_cmd net/core/sock_diag.c:249 [inline]
sock_diag_rcv_msg+0x438/0x790 net/core/sock_diag.c:285
netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x5a7/0x870 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1896
sock_sendmsg_nosec net/socket.c:714 [inline]
__sock_sendmsg net/socket.c:729 [inline]
____sys_sendmsg+0xa95/0xc70 net/socket.c:2614
___sys_sendmsg+0x134/0x1d0 net/socket.c:2668
__sys_sendmsg+0x16d/0x220 net/socket.c:2700
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
</TASK>
(CPU1) | (CPU2)
---------------------------------|-------------------------------
inet_create() |
// init clcsock to NULL |
sk = sk_alloc() |
|
// unexpectedly change clcsock |
inet_init_csk_locks() |
|
// add sk to hash table |
smc_inet_init_sock() |
smc_sk_init() |
smc_hash_sk() |
| // traverse the hash table
| smc_diag_dump_proto
| __smc_diag_dump()
| // visit wrong clcsock
| smc_diag_msg_common_fill()
// alloc clcsock |
smc_create_clcsk |
sock_create_kern |CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.20%
- Percentil entre todas las CVEs puntuadas: 9
- Fecha de la puntuación: 5/10/2026
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 (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2025-40357",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "d25a92ccae6bed02327b63d138e12e7806830f78",
"lessThan": "5b6fc95c4a161326567bdf12a333768565b638f2",
"versionType": "git"
},
{
"status": "affected",
"version": "d25a92ccae6bed02327b63d138e12e7806830f78",
"lessThan": "99b5b3faf3220ba1cdab8e6e42be4f3f993937c3",
"versionType": "git"
},
{
"status": "affected",
"version": "d25a92ccae6bed02327b63d138e12e7806830f78",
"lessThan": "f584239a9ed25057496bf397c370cc5163dde419",
"versionType": "git"
}
],
"programFiles": [
"net/smc/smc_inet.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.56",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.17.6",
"versionType": "semver",
"lessThanOrEqual": "6.17.*"
},
{
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/smc/smc_inet.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-12-16T14:15:47.637",
"references": [
{
"url": "https://git.kernel.org/stable/c/5b6fc95c4a161326567bdf12a333768565b638f2",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/99b5b3faf3220ba1cdab8e6e42be4f3f993937c3",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f584239a9ed25057496bf397c370cc5163dde419",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix general protection fault in __smc_diag_dump\n\nThe syzbot report a crash:\n\n Oops: general protection fault, probably for non-canonical address 0xfbd5a5d5a0000003: 0000 [#1] SMP KASAN NOPTI\n KASAN: maybe wild-memory-access in range [0xdead4ead00000018-0xdead4ead0000001f]\n CPU: 1 UID: 0 PID: 6949 Comm: syz.0.335 Not tainted syzkaller #0 PREEMPT(full)\n Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025\n RIP: 0010:smc_diag_msg_common_fill net/smc/smc_diag.c:44 [inline]\n RIP: 0010:__smc_diag_dump.constprop.0+0x3ca/0x2550 net/smc/smc_diag.c:89\n Call Trace:\n <TASK>\n smc_diag_dump_proto+0x26d/0x420 net/smc/smc_diag.c:217\n smc_diag_dump+0x27/0x90 net/smc/smc_diag.c:234\n netlink_dump+0x539/0xd30 net/netlink/af_netlink.c:2327\n __netlink_dump_start+0x6d6/0x990 net/netlink/af_netlink.c:2442\n netlink_dump_start include/linux/netlink.h:341 [inline]\n smc_diag_handler_dump+0x1f9/0x240 net/smc/smc_diag.c:251\n __sock_diag_cmd net/core/sock_diag.c:249 [inline]\n sock_diag_rcv_msg+0x438/0x790 net/core/sock_diag.c:285\n netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552\n netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]\n netlink_unicast+0x5a7/0x870 net/netlink/af_netlink.c:1346\n netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1896\n sock_sendmsg_nosec net/socket.c:714 [inline]\n __sock_sendmsg net/socket.c:729 [inline]\n ____sys_sendmsg+0xa95/0xc70 net/socket.c:2614\n ___sys_sendmsg+0x134/0x1d0 net/socket.c:2668\n __sys_sendmsg+0x16d/0x220 net/socket.c:2700\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n </TASK>\n\nThe process like this:\n\n (CPU1) | (CPU2)\n ---------------------------------|-------------------------------\n inet_create() |\n // init clcsock to NULL |\n sk = sk_alloc() |\n |\n // unexpectedly change clcsock |\n inet_init_csk_locks() |\n |\n // add sk to hash table |\n smc_inet_init_sock() |\n smc_sk_init() |\n smc_hash_sk() |\n | // traverse the hash table\n | smc_diag_dump_proto\n | __smc_diag_dump()\n | // visit wrong clcsock\n | smc_diag_msg_common_fill()\n // alloc clcsock |\n smc_create_clcsk |\n sock_create_kern |\n\nWith CONFIG_DEBUG_LOCK_ALLOC=y, the smc->clcsock is unexpectedly changed\nin inet_init_csk_locks(). The INET_PROTOSW_ICSK flag is no need by smc,\njust remove it.\n\nAfter removing the INET_PROTOSW_ICSK flag, this patch alse revert\ncommit 6fd27ea183c2 (\"net/smc: fix lacks of icsk_syn_mss with IPPROTO_SMC\")\nto avoid casting smc_sock to inet_connection_sock."
}
],
"lastModified": "2026-06-17T09:21:42.710",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}