CVE-2026-72392
Estado: RecibidaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
ipv6: fib6: fix NULL deref in fib6_walk_continue() on multi-batch dump
inet6_dump_fib() saves its progress in cb->args[1] as a positional index within the current hash chain. Between batches, a concurrent fib6_new_table() can insert a new table at the chain head, shifting all existing entries. The saved index then lands on a different table, causing fib6_dump_table() to set w->root to the wrong table while w->node still points into the previous one. fib6_walk_continue() dereferences w->node->parent (NULL) and panics:
Fix by storing tb->tb6_id in cb->args[1] instead of a positional index. On resume, skip entries until the id matches; a concurrent head-insert can never match the saved id, so the walker always resumes on the correct table.
Detalles técnicos trazas, registros y código del informe original
BUG: kernel NULL pointer dereference, address: 0000000000000008 RIP: 0010:fib6_walk_continue+0x6e/0x170 Call Trace: <TASK> fib6_dump_table.isra.0+0xc5/0x240 inet6_dump_fib+0xf6/0x420 rtnl_dumpit+0x30/0xa0 netlink_dump+0x15b/0x460 netlink_recvmsg+0x1d6/0x2a0 ____sys_recvmsg+0x17a/0x190
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/059efb48dd746518898faaa9b965511009b59639
- https://git.kernel.org/stable/c/110ccbd28c9444866fcc84ba96a2ad64fa6e95ae
- https://git.kernel.org/stable/c/27210d433a8c5fe6bf7278a04bbaeb49a81d0290
- https://git.kernel.org/stable/c/89f9c5fee3c64c5cabc34e65599308fd3c879cf9
- https://git.kernel.org/stable/c/9facb861dc6b9b9ea9793ef5032a9a826f7a4229
- https://git.kernel.org/stable/c/cb90a774a9c6c46961a44949a246fbb61f5f934c
- https://git.kernel.org/stable/c/d8a01d27873e04bebd357dc87859aa756e0b28b2
- https://git.kernel.org/stable/c/ee73a32dd258d4af66831ff006b771e19812b322
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-72392",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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{
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"version": "0",
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{
"status": "unaffected",
"version": "5.10.265",
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{
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver",
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{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
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{
"status": "unaffected",
"version": "6.6.151",
"versionType": "semver",
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{
"status": "unaffected",
"version": "6.12.97",
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{
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{
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"programFiles": [
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"published": "2026-08-15T06:22:12.733",
"references": [
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{
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{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fib6: fix NULL deref in fib6_walk_continue() on multi-batch dump\n\ninet6_dump_fib() saves its progress in cb->args[1] as a positional\nindex within the current hash chain. Between batches, a concurrent\nfib6_new_table() can insert a new table at the chain head, shifting\nall existing entries. The saved index then lands on a different\ntable, causing fib6_dump_table() to set w->root to the wrong table\nwhile w->node still points into the previous one.\nfib6_walk_continue() dereferences w->node->parent (NULL) and panics:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000008\n RIP: 0010:fib6_walk_continue+0x6e/0x170\n Call Trace:\n <TASK>\n fib6_dump_table.isra.0+0xc5/0x240\n inet6_dump_fib+0xf6/0x420\n rtnl_dumpit+0x30/0xa0\n netlink_dump+0x15b/0x460\n netlink_recvmsg+0x1d6/0x2a0\n ____sys_recvmsg+0x17a/0x190\n\nFix by storing tb->tb6_id in cb->args[1] instead of a positional\nindex. On resume, skip entries until the id matches; a concurrent\nhead-insert can never match the saved id, so the walker always\nresumes on the correct table."
}
],
"lastModified": "2026-08-19T17:21:00.820",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}