CVE-2026-80730
Estado: RecibidaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
ring-buffer: Fix crash passing ERR_PTR to kthread_stop()
In test_ringbuffer()'s out_free cleanup loop, the check `!rb_threads[cpu]` only catches NULL entries and misses entries that hold an ERR_PTR.
rb_threads[] is static, so unassigned slots are NULL. But when kthread_run_on_cpu() fails for a cpu, it stores ERR_PTR(-ENOMEM) (or -EINTR) in rb_threads[cpu] before the creation loop jumps to out_free. That entry is non-NULL, so the old `!ptr` check does not break, and the cleanup proceeds to call kthread_stop() on the ERR_PTR. kthread_stop() then dereferences the bogus pointer, crashing the kernel during the late_initcall self-test.
Detalles técnicos trazas, registros y código del informe original
crash logs: BUG: kernel NULL pointer dereference, address: 000000000000001c Oops: 0002 [#1] SMP NOPTI CPU: 1 PID: 1 Comm: swapper/0 Not tainted 7.2.0-rc6-dirty #7 PREEMPT(lazy) RIP: 0010:kthread_stop+0x2e/0x220 RBX: fffffffffffffff4 CR2: 000000000000001c Call Trace: <TASK> test_ringbuffer+0x1ec/0x650 do_one_initcall+0x6c/0x2c0 kernel_init_freeable+0x21d/0x420 kernel_init+0x15/0x1c0 ret_from_fork+0x21b/0x320 </TASK> Kernel panic - not syncing: Fatal exception
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: 0.21%
- 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/3ea2fd344d93e3cf9503739b09fd702c0d8f8f0b
- https://git.kernel.org/stable/c/51d78fad30dd9ae45721224103662bdbcf210096
- https://git.kernel.org/stable/c/6dd7a06894d6d3dc84319bd0b7d1a7c27df9d902
- https://git.kernel.org/stable/c/8532983c312e8b875d7c9e440f8ee4674ea4b711
- https://git.kernel.org/stable/c/91542863abade2fd4f2b361991f5386ad9d19c8c
- https://git.kernel.org/stable/c/93e7044b548a72022208595d2c1b188bb225ce83
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-80730",
"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": "64ed3a049e3e81b801e7c5bb052416152443f585",
"lessThan": "51d78fad30dd9ae45721224103662bdbcf210096",
"versionType": "git"
},
{
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"version": "64ed3a049e3e81b801e7c5bb052416152443f585",
"lessThan": "93e7044b548a72022208595d2c1b188bb225ce83",
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{
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{
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{
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{
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"versionType": "git"
}
],
"programFiles": [
"kernel/trace/ring_buffer.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.152",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.104",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.45",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.9",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/trace/ring_buffer.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-09-03T13:06:11.550",
"references": [
{
"url": "https://git.kernel.org/stable/c/3ea2fd344d93e3cf9503739b09fd702c0d8f8f0b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/51d78fad30dd9ae45721224103662bdbcf210096",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/6dd7a06894d6d3dc84319bd0b7d1a7c27df9d902",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8532983c312e8b875d7c9e440f8ee4674ea4b711",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/91542863abade2fd4f2b361991f5386ad9d19c8c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/93e7044b548a72022208595d2c1b188bb225ce83",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Fix crash passing ERR_PTR to kthread_stop()\n\nIn test_ringbuffer()'s out_free cleanup loop, the check\n`!rb_threads[cpu]` only catches NULL entries and misses entries that\nhold an ERR_PTR.\n\nrb_threads[] is static, so unassigned slots are NULL. But when\nkthread_run_on_cpu() fails for a cpu, it stores ERR_PTR(-ENOMEM) (or\n-EINTR) in rb_threads[cpu] before the creation loop jumps to out_free.\nThat entry is non-NULL, so the old `!ptr` check does not break, and the\ncleanup proceeds to call kthread_stop() on the ERR_PTR. kthread_stop()\nthen dereferences the bogus pointer, crashing the kernel during the\nlate_initcall self-test.\n\ncrash logs:\n BUG: kernel NULL pointer dereference, address: 000000000000001c\n Oops: 0002 [#1] SMP NOPTI\n CPU: 1 PID: 1 Comm: swapper/0 Not tainted 7.2.0-rc6-dirty #7 PREEMPT(lazy)\n RIP: 0010:kthread_stop+0x2e/0x220\n RBX: fffffffffffffff4\n CR2: 000000000000001c\n Call Trace:\n <TASK>\n test_ringbuffer+0x1ec/0x650\n do_one_initcall+0x6c/0x2c0\n kernel_init_freeable+0x21d/0x420\n kernel_init+0x15/0x1c0\n ret_from_fork+0x21b/0x320\n </TASK>\n Kernel panic - not syncing: Fatal exception"
}
],
"lastModified": "2026-09-03T13:06:11.550",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}