CVE-2026-98094
Estado: En análisisSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
staging: fbtft: make dirty_lock IRQ-safe
fbtft_mkdirty() can be reached from the fbcon rendering path while processing printk() in hardirq context. Meanwhile, dirty_lock is also taken by fbtft_deferred_io() in workqueue context with local interrupts enabled.
Lockdep reports a possible IRQ lock inversion involving dirty_lock and console_owner. A hardirq can interrupt a CPU holding dirty_lock and enter the console rendering path, which can attempt to acquire dirty_lock again.
The following lockdep report was observed on an RK3566 system with CONFIG_PROVE_LOCKING enabled:
Leer descripción completaMostrar menos
Use spin_lock_irqsave() for fbtft_mkdirty() and spin_lock_irq() for fbtft_deferred_io(). They only access the dirty line range, so the IRQ-off regions remain short.
Detalles técnicos trazas, registros y código del informe original
WARNING: possible irq lock inversion dependency detected
swapper/2/0 just changed the state of lock:
(console_owner){-...}-{0:0}
but this lock took another, HARDIRQ-unsafe lock in the past:
(&par->dirty_lock){+.+.}-{2:2}
CPU0 CPU1
---- ----
lock(&par->dirty_lock);
local_irq_disable();
lock(console_owner);
lock(&par->dirty_lock);
<Interrupt>
lock(console_owner);
*** DEADLOCK ***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: 0.18%
- Percentil entre todas las CVEs puntuadas: 7
- Fecha de la puntuación: 5/10/2026
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/0843298b159599ee7bc6d14800efdb4bc7349706
- https://git.kernel.org/stable/c/10cc145b873670438d3b105133dffdae70822db6
- https://git.kernel.org/stable/c/2a609e29efbba79f9abd68c4ec8a2bd7ecf291e7
- https://git.kernel.org/stable/c/a323066337ed85c38decfc7f6bbf42f27605dff1
- https://git.kernel.org/stable/c/dcb48fde8003492256dee45815144aa5ed26ce7c
- https://git.kernel.org/stable/c/f0c869df2c33793c8828acaab3e4a5e0176f9f00
- https://git.kernel.org/stable/c/f2451e18826eb6a33ea51419f39bdd2eb99fa1ea
- https://git.kernel.org/stable/c/f576944a59f31bcffff121117ebf452c5dd162b7
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-98094",
"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": "c296d5f9957c03994a699d6739c27d4581a9f6c7",
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{
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{
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},
{
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{
"status": "affected",
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{
"status": "affected",
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"lessThan": "f0c869df2c33793c8828acaab3e4a5e0176f9f00",
"versionType": "git"
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{
"status": "affected",
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],
"programFiles": [
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],
"defaultStatus": "unaffected"
},
{
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"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.0"
},
{
"status": "unaffected",
"version": "0",
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"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
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},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
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},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
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},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
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},
{
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"versionType": "semver",
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},
{
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"version": "7.3-rc2",
"versionType": "original_commit_for_fix",
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}
],
"programFiles": [
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],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-09-25T11:17:39.133",
"references": [
{
"url": "https://git.kernel.org/stable/c/0843298b159599ee7bc6d14800efdb4bc7349706",
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{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f0c869df2c33793c8828acaab3e4a5e0176f9f00",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f2451e18826eb6a33ea51419f39bdd2eb99fa1ea",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f576944a59f31bcffff121117ebf452c5dd162b7",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Undergoing Analysis",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: fbtft: make dirty_lock IRQ-safe\n\nfbtft_mkdirty() can be reached from the fbcon rendering path while\nprocessing printk() in hardirq context. Meanwhile, dirty_lock is also\ntaken by fbtft_deferred_io() in workqueue context with local interrupts\nenabled.\n\nLockdep reports a possible IRQ lock inversion involving dirty_lock and\nconsole_owner. A hardirq can interrupt a CPU holding dirty_lock and\nenter the console rendering path, which can attempt to acquire\ndirty_lock again.\n\nThe following lockdep report was observed on an RK3566 system with\nCONFIG_PROVE_LOCKING enabled:\n\n WARNING: possible irq lock inversion dependency detected\n swapper/2/0 just changed the state of lock:\n (console_owner){-...}-{0:0}\n but this lock took another, HARDIRQ-unsafe lock in the past:\n (&par->dirty_lock){+.+.}-{2:2}\n\n CPU0 CPU1\n ---- ----\n lock(&par->dirty_lock);\n local_irq_disable();\n lock(console_owner);\n lock(&par->dirty_lock);\n <Interrupt>\n lock(console_owner);\n\n *** DEADLOCK ***\n\nUse spin_lock_irqsave() for fbtft_mkdirty() and spin_lock_irq() for\nfbtft_deferred_io(). They only access the dirty line range, so the\nIRQ-off regions remain short."
}
],
"lastModified": "2026-10-03T11:18:31.457",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}