CVE-2026-98378
Estado: RecibidaSin puntuar—
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:
bpf: Omitir enlaces no establecidos en el iterador de enlaces
bpf_link_prime() inserta un enlace en link_idr antes de que anon_inode_getfile() tenga éxito y antes de que bpf_link_settle() publique el ID en link->id. bpf_link_by_id() trata un enlace con ID cero como no establecido, pero el iterador de enlaces toma una referencia sin esta comprobación.
Si anon_inode_getfile() falla, el creador elimina el ID y libera su enlace aún privado directamente. El iterador se queda con una referencia pendiente y su siguiente bpf_link_put() accede a memoria liberada.
Leer descripción completaMostrar menos
Tratar las entradas con ID cero como transitorias en bpf_link_get_curr_or_next(), tal como bpf_link_by_id() hace.
Detalles técnicos trazas, registros y código del informe original
BUG: KASAN: slab-use-after-free in bpf_link_put Write of size 8 by task exp/384 Call Trace: bpf_link_put kernel/bpf/syscall.c:3372 bpf_link_seq_next kernel/bpf/link_iter.c:33 bpf_seq_read kernel/bpf/bpf_iter.c:158 vfs_read fs/read_write.c:572 ksys_read fs/read_write.c:716 do_syscall_64 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe arch/x86/entry/entry_64.S:121 Kernel panic - not syncing: KASAN: panic_on_warn set ...
Traducción automática del texto original de NVD (en inglés).
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: 0.16%
- Percentil entre todas las CVEs puntuadas: 5
- Fecha de la puntuación: 13/10/2026
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/50e80e2bb5e2be8515205b9c496b9640ddefa434
- https://git.kernel.org/stable/c/68930f8d40ab4c10ca3b019f076136758fd100a8
- https://git.kernel.org/stable/c/6e271f093d15d323f42de26f66556af53fa8e19f
- https://git.kernel.org/stable/c/798a61edbc436cacdb659927d067368eeb1e30e2
- https://git.kernel.org/stable/c/87ce4b53b7436b50fc984f0a6afaf77f68ac5573
- https://git.kernel.org/stable/c/c251ed48bd9063cf7de6049421e78b6de989060f
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-98378",
"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": "9f88361273082825d9f0d13a543d49f9fa0d44a8",
"lessThan": "68930f8d40ab4c10ca3b019f076136758fd100a8",
"versionType": "git"
},
{
"status": "affected",
"version": "9f88361273082825d9f0d13a543d49f9fa0d44a8",
"lessThan": "c251ed48bd9063cf7de6049421e78b6de989060f",
"versionType": "git"
},
{
"status": "affected",
"version": "9f88361273082825d9f0d13a543d49f9fa0d44a8",
"lessThan": "798a61edbc436cacdb659927d067368eeb1e30e2",
"versionType": "git"
},
{
"status": "affected",
"version": "9f88361273082825d9f0d13a543d49f9fa0d44a8",
"lessThan": "6e271f093d15d323f42de26f66556af53fa8e19f",
"versionType": "git"
},
{
"status": "affected",
"version": "9f88361273082825d9f0d13a543d49f9fa0d44a8",
"lessThan": "87ce4b53b7436b50fc984f0a6afaf77f68ac5573",
"versionType": "git"
},
{
"status": "affected",
"version": "9f88361273082825d9f0d13a543d49f9fa0d44a8",
"lessThan": "50e80e2bb5e2be8515205b9c496b9640ddefa434",
"versionType": "git"
}
],
"programFiles": [
"kernel/bpf/syscall.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3-rc5",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/bpf/syscall.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-09T08:16:56.123",
"references": [
{
"url": "https://git.kernel.org/stable/c/50e80e2bb5e2be8515205b9c496b9640ddefa434",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/68930f8d40ab4c10ca3b019f076136758fd100a8",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/6e271f093d15d323f42de26f66556af53fa8e19f",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/798a61edbc436cacdb659927d067368eeb1e30e2",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/87ce4b53b7436b50fc984f0a6afaf77f68ac5573",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c251ed48bd9063cf7de6049421e78b6de989060f",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Skip unsettled links in link iterator\n\nbpf_link_prime() inserts a link into link_idr before anon_inode_getfile()\nsucceeds and before bpf_link_settle() publishes the ID in link->id.\nbpf_link_by_id() treats such an ID-zero link as unsettled, but the link\niterator takes a reference without this check.\n\nIf anon_inode_getfile() then fails, the creator removes the ID and frees\nits still-private link directly. The iterator is left with a dangling\nreference and its next bpf_link_put() accesses freed memory.\n\nTreat ID-zero entries as transient in bpf_link_get_curr_or_next(), just as\nbpf_link_by_id() does.\n\n BUG: KASAN: slab-use-after-free in bpf_link_put\n Write of size 8 by task exp/384\n Call Trace:\n bpf_link_put kernel/bpf/syscall.c:3372\n bpf_link_seq_next kernel/bpf/link_iter.c:33\n bpf_seq_read kernel/bpf/bpf_iter.c:158\n vfs_read fs/read_write.c:572\n ksys_read fs/read_write.c:716\n do_syscall_64 arch/x86/entry/syscall_64.c:84\n entry_SYSCALL_64_after_hwframe arch/x86/entry/entry_64.S:121\n Kernel panic - not syncing: KASAN: panic_on_warn set ..."
}
],
"lastModified": "2026-10-09T08:16:56.123",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}