CVE-2025-68366
Estado: AplazadaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
nbd: defer config unlock in nbd_genl_connect
There is one use-after-free warning when running NBD_CMD_CONNECT and NBD_CLEAR_SOCK:
The issue can be easily reproduced by adding a small delay before refcount_inc(&nbd->config_refs) in nbd_genl_connect():
Detalles técnicos trazas, registros y código del informe original
nbd_genl_connect
nbd_alloc_and_init_config // config_refs=1
nbd_start_device // config_refs=2
set NBD_RT_HAS_CONFIG_REF open nbd // config_refs=3
recv_work done // config_refs=2
NBD_CLEAR_SOCK // config_refs=1
close nbd // config_refs=0
refcount_inc -> uaf
------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 24 PID: 1014 at lib/refcount.c:25 refcount_warn_saturate+0x12e/0x290
nbd_genl_connect+0x16d0/0x1ab0
genl_family_rcv_msg_doit+0x1f3/0x310
genl_rcv_msg+0x44a/0x790
mutex_unlock(&nbd->config_lock);
if (!ret) {
set_bit(NBD_RT_HAS_CONFIG_REF, &config->runtime_flags);
+ printk("before sleep\n");
+ mdelay(5 * 1000);
+ printk("after sleep\n");
refcount_inc(&nbd->config_refs);
nbd_connect_reply(info, nbd->index);
}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
- https://git.kernel.org/stable/c/1649714b930f9ea6233ce0810ba885999da3b5d4
- https://git.kernel.org/stable/c/2e5e0665a594f076ef2b9439447bae8be293d09d
- https://git.kernel.org/stable/c/330d688a5ca53857828081a3cf31b92ad1b0b3ed
- https://git.kernel.org/stable/c/9a38306643874566d20f7aba7dff9e6f657b51a9
- https://git.kernel.org/stable/c/ae3e7bc1f4b393ae20e5c85583eb2c6977374716
- https://git.kernel.org/stable/c/c9b99c948b4fb014812afe7b5ccf2db121d22e46
- https://git.kernel.org/stable/c/c9e805f6a35d1dd189a9345595a5c20e87611942
- https://git.kernel.org/stable/c/cd93db1b1b4460e6ee77564024ea461e5940f69c
JSON original (NVD)
Mostrar
{
"id": "CVE-2025-68366",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-68366",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-06-16T19:12:23.169488Z"
}
}
]
},
"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": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
"lessThan": "330d688a5ca53857828081a3cf31b92ad1b0b3ed",
"versionType": "git"
},
{
"status": "affected",
"version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
"lessThan": "cd93db1b1b4460e6ee77564024ea461e5940f69c",
"versionType": "git"
},
{
"status": "affected",
"version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
"lessThan": "ae3e7bc1f4b393ae20e5c85583eb2c6977374716",
"versionType": "git"
},
{
"status": "affected",
"version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
"lessThan": "2e5e0665a594f076ef2b9439447bae8be293d09d",
"versionType": "git"
},
{
"status": "affected",
"version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
"lessThan": "c9b99c948b4fb014812afe7b5ccf2db121d22e46",
"versionType": "git"
},
{
"status": "affected",
"version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
"lessThan": "9a38306643874566d20f7aba7dff9e6f657b51a9",
"versionType": "git"
},
{
"status": "affected",
"version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
"lessThan": "c9e805f6a35d1dd189a9345595a5c20e87611942",
"versionType": "git"
},
{
"status": "affected",
"version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099",
"lessThan": "1649714b930f9ea6233ce0810ba885999da3b5d4",
"versionType": "git"
}
],
"programFiles": [
"drivers/block/nbd.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.248",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.198",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.160",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.120",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.63",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.17.13",
"versionType": "semver",
"lessThanOrEqual": "6.17.*"
},
{
"status": "unaffected",
"version": "6.18.2",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/block/nbd.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-12-24T11:16:00.163",
"references": [
{
"url": "https://git.kernel.org/stable/c/1649714b930f9ea6233ce0810ba885999da3b5d4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/2e5e0665a594f076ef2b9439447bae8be293d09d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/330d688a5ca53857828081a3cf31b92ad1b0b3ed",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9a38306643874566d20f7aba7dff9e6f657b51a9",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ae3e7bc1f4b393ae20e5c85583eb2c6977374716",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c9b99c948b4fb014812afe7b5ccf2db121d22e46",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c9e805f6a35d1dd189a9345595a5c20e87611942",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/cd93db1b1b4460e6ee77564024ea461e5940f69c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: defer config unlock in nbd_genl_connect\n\nThere is one use-after-free warning when running NBD_CMD_CONNECT and\nNBD_CLEAR_SOCK:\n\nnbd_genl_connect\n nbd_alloc_and_init_config // config_refs=1\n nbd_start_device // config_refs=2\n set NBD_RT_HAS_CONFIG_REF\t\t\topen nbd // config_refs=3\n recv_work done // config_refs=2\n\t\t\t\t\t\tNBD_CLEAR_SOCK // config_refs=1\n\t\t\t\t\t\tclose nbd // config_refs=0\n refcount_inc -> uaf\n\n------------[ cut here ]------------\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 24 PID: 1014 at lib/refcount.c:25 refcount_warn_saturate+0x12e/0x290\n nbd_genl_connect+0x16d0/0x1ab0\n genl_family_rcv_msg_doit+0x1f3/0x310\n genl_rcv_msg+0x44a/0x790\n\nThe issue can be easily reproduced by adding a small delay before\nrefcount_inc(&nbd->config_refs) in nbd_genl_connect():\n\n mutex_unlock(&nbd->config_lock);\n if (!ret) {\n set_bit(NBD_RT_HAS_CONFIG_REF, &config->runtime_flags);\n+ printk(\"before sleep\\n\");\n+ mdelay(5 * 1000);\n+ printk(\"after sleep\\n\");\n refcount_inc(&nbd->config_refs);\n nbd_connect_reply(info, nbd->index);\n }"
}
],
"lastModified": "2026-06-17T09:59:00.533",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}