CVE-2023-53825
Estado: AplazadaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
kcm: Fix error handling for SOCK_DGRAM in kcm_sendmsg().
syzkaller found a memory leak in kcm_sendmsg(), and commit c821a88bd720 ("kcm: Fix memory leak in error path of kcm_sendmsg()") suppressed it by updating kcm_tx_msg(head)->last_skb if partial data is copied so that the following sendmsg() will resume from the skb.
However, we cannot know how many bytes were copied when we get the error. Thus, we could mess up the MSG_MORE queue.
When kcm_sendmsg() fails for SOCK_DGRAM, we should purge the queue as we do so for UDP by udp_flush_pending_frames().
Leer descripción completaMostrar menos
Even without this change, when the error occurred, the following sendmsg() resumed from a wrong skb and the queue was messed up. However, we have yet to get such a report, and only syzkaller stumbled on it. So, this can be changed safely.
Note this does not change SOCK_SEQPACKET behaviour.
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: 0.26%
- Percentil entre todas las CVEs puntuadas: 16
- 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).
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/1ce8362b4ac6b8e65fd04a22ea37ec776ee1ec5b
- https://git.kernel.org/stable/c/21b467735b0888a8daa048f83d3b9b50fdab71ce
- https://git.kernel.org/stable/c/2e18493c421428a936946c452461b8e979088f17
- https://git.kernel.org/stable/c/55d2e7c1ab8eaa7b62575b8a4194132795d1f9fc
- https://git.kernel.org/stable/c/992b2ac783aad360b98ed9d4686e86176a20f6f1
- https://git.kernel.org/stable/c/a22730b1b4bf437c6bbfdeff5feddf54be4aeada
- https://git.kernel.org/stable/c/d4b8f380b0a041ee6a84fdac14127d8fe1dcad7b
- https://git.kernel.org/stable/c/e5b28ce127a690f3acc49a6a342e6c9442c9edd6
JSON original (NVD)
Mostrar
{
"id": "CVE-2023-53825",
"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": "ab7ac4eb9832e32a09f4e8042705484d2fb0aad3",
"lessThan": "21b467735b0888a8daa048f83d3b9b50fdab71ce",
"versionType": "git"
},
{
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"versionType": "git"
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{
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"versionType": "git"
},
{
"status": "affected",
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"versionType": "git"
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{
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{
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],
"programFiles": [
"net/kcm/kcmsock.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.14.326",
"versionType": "semver",
"lessThanOrEqual": "4.14.*"
},
{
"status": "unaffected",
"version": "4.19.295",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.257",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.195",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.132",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.54",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.5.4",
"versionType": "semver",
"lessThanOrEqual": "6.5.*"
},
{
"status": "unaffected",
"version": "6.6",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/kcm/kcmsock.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-12-09T16:17:21.337",
"references": [
{
"url": "https://git.kernel.org/stable/c/1ce8362b4ac6b8e65fd04a22ea37ec776ee1ec5b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
"url": "https://git.kernel.org/stable/c/2e18493c421428a936946c452461b8e979088f17",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/55d2e7c1ab8eaa7b62575b8a4194132795d1f9fc",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/992b2ac783aad360b98ed9d4686e86176a20f6f1",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a22730b1b4bf437c6bbfdeff5feddf54be4aeada",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d4b8f380b0a041ee6a84fdac14127d8fe1dcad7b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e5b28ce127a690f3acc49a6a342e6c9442c9edd6",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkcm: Fix error handling for SOCK_DGRAM in kcm_sendmsg().\n\nsyzkaller found a memory leak in kcm_sendmsg(), and commit c821a88bd720\n(\"kcm: Fix memory leak in error path of kcm_sendmsg()\") suppressed it by\nupdating kcm_tx_msg(head)->last_skb if partial data is copied so that the\nfollowing sendmsg() will resume from the skb.\n\nHowever, we cannot know how many bytes were copied when we get the error.\nThus, we could mess up the MSG_MORE queue.\n\nWhen kcm_sendmsg() fails for SOCK_DGRAM, we should purge the queue as we\ndo so for UDP by udp_flush_pending_frames().\n\nEven without this change, when the error occurred, the following sendmsg()\nresumed from a wrong skb and the queue was messed up. However, we have\nyet to get such a report, and only syzkaller stumbled on it. So, this\ncan be changed safely.\n\nNote this does not change SOCK_SEQPACKET behaviour."
}
],
"lastModified": "2026-06-17T06:46:08.283",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}