CVE-2026-72447
In the Linux kernel, the following vulnerability has been resolved:
sctp: hold socket lock when dumping endpoints in sctp_diag
SCTP_DIAG endpoint dumping was traversing endpoint address lists without holding lock_sock(), while those lists could change concurrently via socket operations (e.g., bindx changes). This creates a race where nla_reserve() counts addresses under RCU protection, but the subsequent copy may see fewer entries, potentially leaking uninitialized memory to userspace.
Fix this by:
- Taking a reference on each endpoint during hash traversal - Moving socket operations (lock_sock()) outside read_lock_bh() - Serializing address list access during dump - Reworking sctp_for_each_endpoint() to support restart-based traversal with (net, pos) tracking
Leer descripción completaMostrar menos
Also:
- Add WARN_ON_ONCE() for inconsistent address counts - Fix idiag_states filtering for LISTEN vs association cases - Skip dumping endpoints being freed (ep->base.dead) - Move dump position tracking into iterator, removing cb->args[4] and its comment for sctp_ep_dump()., - Update the comment for cb->args[4] and remove the comment for unused cb->args[5] for sctp_sock_dump().
Note: traversal is restart-based and may re-scan buckets multiple times, but this is acceptable due to small bucket sizes and required to support sleeping-safe callbacks.
This issue was reported by Nico Yip (@_cyeaa_) working with TrendAI Zero Day Initiative.
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: 0.22%
- Percentil entre todas las CVEs puntuadas: 11
- 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/207bb4ce8fe7de961ae7bb33569ad2cd61f44954
- https://git.kernel.org/stable/c/722576aba0a6d9423714550b1c03239b0f0def77
- https://git.kernel.org/stable/c/7d8297e26b4e20b5d1c3c3fe51fe81a1c7fbc823
- https://git.kernel.org/stable/c/8b38e3dcfde3077dbc03eb8ef88e03cc19f70b8a
- https://git.kernel.org/stable/c/abe7f8828e6ac8be858870c2bf836258844f97d5
- https://git.kernel.org/stable/c/ec3c2d59a192e17e1014ba71afc368ba162ecac3
- https://git.kernel.org/stable/c/f09a245f33e567b604efa1960b7a2d25dd9c8713
- https://git.kernel.org/stable/c/f98c294a9369b6fe89e652c06357ee594be4dfa2
JSON original (NVD)
Mostrar
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{
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"published": "2026-08-15T06:22:18.600",
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],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: hold socket lock when dumping endpoints in sctp_diag\n\nSCTP_DIAG endpoint dumping was traversing endpoint address lists without\nholding lock_sock(), while those lists could change concurrently via\nsocket operations (e.g., bindx changes). This creates a race where\nnla_reserve() counts addresses under RCU protection, but the subsequent\ncopy may see fewer entries, potentially leaking uninitialized memory to\nuserspace.\n\nFix this by:\n\n- Taking a reference on each endpoint during hash traversal\n- Moving socket operations (lock_sock()) outside read_lock_bh()\n- Serializing address list access during dump\n- Reworking sctp_for_each_endpoint() to support restart-based traversal\n with (net, pos) tracking\n\nAlso:\n\n- Add WARN_ON_ONCE() for inconsistent address counts\n- Fix idiag_states filtering for LISTEN vs association cases\n- Skip dumping endpoints being freed (ep->base.dead)\n- Move dump position tracking into iterator, removing cb->args[4] and\n its comment for sctp_ep_dump().,\n- Update the comment for cb->args[4] and remove the comment for unused\n cb->args[5] for sctp_sock_dump().\n\nNote: traversal is restart-based and may re-scan buckets multiple times,\nbut this is acceptable due to small bucket sizes and required to support\nsleeping-safe callbacks.\n\nThis issue was reported by Nico Yip (@_cyeaa_) working with TrendAI Zero\nDay Initiative."
}
],
"lastModified": "2026-08-17T06:19:12.170",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}