CVE-2023-54237
Estado: AplazadaCrítica (9.8)—
In the Linux kernel, the following vulnerability has been resolved:
net/smc: fix potential panic dues to unprotected smc_llc_srv_add_link()
There is a certain chance to trigger the following panic:
The reason here is that when the server tries to create a second link, smc_llc_srv_add_link() has no protection and may add a new link to link group. This breaks the security environment protected by llc_conf_mutex.
Detalles técnicos trazas, registros y código del informe original
PID: 5900 TASK: ffff88c1c8af4100 CPU: 1 COMMAND: "kworker/1:48"
#0 [ffff9456c1cc79a0] machine_kexec at ffffffff870665b7
#1 [ffff9456c1cc79f0] __crash_kexec at ffffffff871b4c7a
#2 [ffff9456c1cc7ab0] crash_kexec at ffffffff871b5b60
#3 [ffff9456c1cc7ac0] oops_end at ffffffff87026ce7
#4 [ffff9456c1cc7ae0] page_fault_oops at ffffffff87075715
#5 [ffff9456c1cc7b58] exc_page_fault at ffffffff87ad0654
#6 [ffff9456c1cc7b80] asm_exc_page_fault at ffffffff87c00b62
[exception RIP: ib_alloc_mr+19]
RIP: ffffffffc0c9cce3 RSP: ffff9456c1cc7c38 RFLAGS: 00010202
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000004
RDX: 0000000000000010 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88c1ea281d00 R8: 000000020a34ffff R9: ffff88c1350bbb20
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000010 R14: ffff88c1ab040a50 R15: ffff88c1ea281d00
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#7 [ffff9456c1cc7c60] smc_ib_get_memory_region at ffffffffc0aff6df [smc]
#8 [ffff9456c1cc7c88] smcr_buf_map_link at ffffffffc0b0278c [smc]
#9 [ffff9456c1cc7ce0] __smc_buf_create at ffffffffc0b03586 [smc]CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 9.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.56%
- Percentil entre todas las CVEs puntuadas: 44
- Fecha de la puntuación: 6/10/2026
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).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access85 % - Impacto principal
T1499.004Application or System Exploitationimpact75 % - Impacto secundario
T1068Exploitation for Privilege Escalationprivilege escalation70 %
Vulnerabilidad remota (AV:N, PR:N, UI:N) en el kernel de Linux en protocolo SMC. El pánico no protegido permite denegación de servicio y potencial escalada local (C:H/I:H/A:H).
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
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-2023-54237",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Secondary",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 9.8,
"attackVector": "NETWORK",
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 3.9
}
]
},
"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": "2d2209f2018943d4152a21eff5b76f1952e0b435",
"lessThan": "fe35c24b730d38b421da93ac5d493cb4495e8e54",
"versionType": "git"
},
{
"status": "affected",
"version": "2d2209f2018943d4152a21eff5b76f1952e0b435",
"lessThan": "f2f46de98c11d41ac8d22765f47ba54ce5480a5b",
"versionType": "git"
},
{
"status": "affected",
"version": "2d2209f2018943d4152a21eff5b76f1952e0b435",
"lessThan": "0c764cc271d3aa6528ae1b3394babf34ac01f775",
"versionType": "git"
},
{
"status": "affected",
"version": "2d2209f2018943d4152a21eff5b76f1952e0b435",
"lessThan": "e40b801b3603a8f90b46acbacdea3505c27f01c0",
"versionType": "git"
}
],
"programFiles": [
"net/smc/af_smc.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "6.1.16",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.2.3",
"versionType": "semver",
"lessThanOrEqual": "6.2.*"
},
{
"status": "unaffected",
"version": "6.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/smc/af_smc.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-12-30T13:16:12.193",
"references": [
{
"url": "https://git.kernel.org/stable/c/0c764cc271d3aa6528ae1b3394babf34ac01f775",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e40b801b3603a8f90b46acbacdea3505c27f01c0",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f2f46de98c11d41ac8d22765f47ba54ce5480a5b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/fe35c24b730d38b421da93ac5d493cb4495e8e54",
"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 potential panic dues to unprotected smc_llc_srv_add_link()\n\nThere is a certain chance to trigger the following panic:\n\nPID: 5900 TASK: ffff88c1c8af4100 CPU: 1 COMMAND: \"kworker/1:48\"\n #0 [ffff9456c1cc79a0] machine_kexec at ffffffff870665b7\n #1 [ffff9456c1cc79f0] __crash_kexec at ffffffff871b4c7a\n #2 [ffff9456c1cc7ab0] crash_kexec at ffffffff871b5b60\n #3 [ffff9456c1cc7ac0] oops_end at ffffffff87026ce7\n #4 [ffff9456c1cc7ae0] page_fault_oops at ffffffff87075715\n #5 [ffff9456c1cc7b58] exc_page_fault at ffffffff87ad0654\n #6 [ffff9456c1cc7b80] asm_exc_page_fault at ffffffff87c00b62\n [exception RIP: ib_alloc_mr+19]\n RIP: ffffffffc0c9cce3 RSP: ffff9456c1cc7c38 RFLAGS: 00010202\n RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000004\n RDX: 0000000000000010 RSI: 0000000000000000 RDI: 0000000000000000\n RBP: ffff88c1ea281d00 R8: 000000020a34ffff R9: ffff88c1350bbb20\n R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000\n R13: 0000000000000010 R14: ffff88c1ab040a50 R15: ffff88c1ea281d00\n ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018\n #7 [ffff9456c1cc7c60] smc_ib_get_memory_region at ffffffffc0aff6df [smc]\n #8 [ffff9456c1cc7c88] smcr_buf_map_link at ffffffffc0b0278c [smc]\n #9 [ffff9456c1cc7ce0] __smc_buf_create at ffffffffc0b03586 [smc]\n\nThe reason here is that when the server tries to create a second link,\nsmc_llc_srv_add_link() has no protection and may add a new link to\nlink group. This breaks the security environment protected by\nllc_conf_mutex."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet/smc: corrige un pánico potencial debido a smc_llc_srv_add_link() sin protección\n\nExiste una cierta probabilidad de desencadenar el siguiente pánico:\n\nPID: 5900 TASK: ffff88c1c8af4100 CPU: 1 COMMAND: \"kworker/1:48\"\n #0 [ffff9456c1cc79a0] machine_kexec at ffffffff870665b7\n #1 [ffff9456c1cc79f0] __crash_kexec at ffffffff871b4c7a\n #2 [ffff9456c1cc7ab0] crash_kexec at ffffffff871b5b60\n #3 [ffff9456c1cc7ac0] oops_end at ffffffff87026ce7\n #4 [ffff9456c1cc7ae0] page_fault_oops at ffffffff87075715\n #5 [ffff9456c1cc7b58] exc_page_fault at ffffffff87ad0654\n #6 [ffff9456c1cc7b80] asm_exc_page_fault at ffffffff87c00b62\n [exception RIP: ib_alloc_mr+19]\n RIP: ffffffffc0c9cce3 RSP: ffff9456c1cc7c38 RFLAGS: 00010202\n RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000004\n RDX: 0000000000000010 RSI: 0000000000000000 RDI: 0000000000000000\n RBP: ffff88c1ea281d00 R8: 000000020a34ffff R9: ffff88c1350bbb20\n R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000\n R13: 0000000000000010 R14: ffff88c1ab040a50 R15: ffff88c1ea281d00\n ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018\n #7 [ffff9456c1cc7c60] smc_ib_get_memory_region at ffffffffc0aff6df [smc]\n #8 [ffff9456c1cc7c88] smcr_buf_map_link at ffffffffc0b0278c [smc]\n #9 [ffff9456c1cc7ce0] __smc_buf_create at ffffffffc0b03586 [smc]\n\nLa razón aquí es que cuando el servidor intenta crear un segundo enlace, smc_llc_srv_add_link() no tiene protección y puede añadir un nuevo enlace al grupo de enlaces. Esto rompe el entorno de seguridad protegido por llc_conf_mutex."
}
],
"lastModified": "2026-09-14T12:17:32.890",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}