CVE-2026-74441
Estado: RecibidaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
usb: typec: ucsi: Fix race condition and ordering in port unregistration
A synchronization issue exists during port unregistration where pending partner work items can race against workqueue destruction, leading to use-after-free conditions:
Fix this by ensuring strict ordering and proper serialization during teardown:
1. Move ucsi_unregister_partner() to the beginning of the teardown sequence and protect it under the connector mutex lock. 2.
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Ensure all pending partner tasks are explicitly flushed and finished before the workqueue is destroyed. 3. Switch from mod_delayed_work() to a cancel_delayed_work() and queue_delayed_work() sequence. This guarantees that items currently marked as pending won't be scheduled an additional time, preventing a double release of resources which leads to the following crash:
To ensure these rules are applied identically across both the normal teardown and the ucsi_init() error paths, consolidate the cleanup logic into a new helper, ucsi_unregister_port().
Detalles técnicos trazas, registros y código del informe original
cros_ec_ucsi cros_ec_ucsi.3.auto: error -ETIMEDOUT: PPM init failed
BUG: kernel NULL pointer dereference, address: 0000000000000000
RIP: 0010:__queue_work+0x83/0x4a0
Call Trace:
<IRQ>
__cfi_delayed_work_timer_fn+0x10/0x10
run_timer_softirq+0x3b6/0xbd0
sched_clock_cpu+0xc/0x110
irq_exit_rcu+0x18d/0x330
fred_sysvec_apic_timer_interrupt+0x5e/0x80
Oops: general protection fault, probably for non-canonical address
0xdead000000000122: 0000 [#1] SMP NOPTI
Workqueue: cros_ec_ucsi.3.auto-con2 ucsi_poll_worker
RIP: 0010:ucsi_poll_worker+0x65/0x1e0
Call Trace:
<TASK>
process_scheduled_works+0x218/0x6d0
worker_thread+0x188/0x3f0
__cfi_worker_thread+0x10/0x10
kthread+0x226/0x2a0CVSS
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/07f8aaffee705e552c1f723ac8bf7eb137ad59c2
- https://git.kernel.org/stable/c/11483d80267db97fbe49f2df66385434256cc3b0
- https://git.kernel.org/stable/c/3f7b3728dd9011c915cbeaea77274ebe8366550d
- https://git.kernel.org/stable/c/7aa7d4bf9d3fa9a6a47b640ad103ab433b7ff261
- https://git.kernel.org/stable/c/7b63c680ff605f60f056e5f2c323f1a602aee182
- https://git.kernel.org/stable/c/bc7a0f721123ea260a42f1ded06dab844ba49434
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-74441",
"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": "b9aa02ca39a49740926c2c450a1505a4a0f8954a",
"lessThan": "7b63c680ff605f60f056e5f2c323f1a602aee182",
"versionType": "git"
},
{
"status": "affected",
"version": "b9aa02ca39a49740926c2c450a1505a4a0f8954a",
"lessThan": "07f8aaffee705e552c1f723ac8bf7eb137ad59c2",
"versionType": "git"
},
{
"status": "affected",
"version": "b9aa02ca39a49740926c2c450a1505a4a0f8954a",
"lessThan": "11483d80267db97fbe49f2df66385434256cc3b0",
"versionType": "git"
},
{
"status": "affected",
"version": "b9aa02ca39a49740926c2c450a1505a4a0f8954a",
"lessThan": "3f7b3728dd9011c915cbeaea77274ebe8366550d",
"versionType": "git"
},
{
"status": "affected",
"version": "b9aa02ca39a49740926c2c450a1505a4a0f8954a",
"lessThan": "bc7a0f721123ea260a42f1ded06dab844ba49434",
"versionType": "git"
},
{
"status": "affected",
"version": "b9aa02ca39a49740926c2c450a1505a4a0f8954a",
"lessThan": "7aa7d4bf9d3fa9a6a47b640ad103ab433b7ff261",
"versionType": "git"
}
],
"programFiles": [
"drivers/usb/typec/ucsi/ucsi.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.184",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.151",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.103",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/usb/typec/ucsi/ucsi.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-08-15T13:17:48.643",
"references": [
{
"url": "https://git.kernel.org/stable/c/07f8aaffee705e552c1f723ac8bf7eb137ad59c2",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/11483d80267db97fbe49f2df66385434256cc3b0",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/3f7b3728dd9011c915cbeaea77274ebe8366550d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/7aa7d4bf9d3fa9a6a47b640ad103ab433b7ff261",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/7b63c680ff605f60f056e5f2c323f1a602aee182",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/bc7a0f721123ea260a42f1ded06dab844ba49434",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: Fix race condition and ordering in port unregistration\n\nA synchronization issue exists during port unregistration where pending\npartner work items can race against workqueue destruction, leading to\nuse-after-free conditions:\n\n cros_ec_ucsi cros_ec_ucsi.3.auto: error -ETIMEDOUT: PPM init failed\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n RIP: 0010:__queue_work+0x83/0x4a0\n Call Trace:\n <IRQ>\n __cfi_delayed_work_timer_fn+0x10/0x10\n run_timer_softirq+0x3b6/0xbd0\n sched_clock_cpu+0xc/0x110\n irq_exit_rcu+0x18d/0x330\n fred_sysvec_apic_timer_interrupt+0x5e/0x80\n\nFix this by ensuring strict ordering and proper serialization during\nteardown:\n\n1. Move ucsi_unregister_partner() to the beginning of the teardown\nsequence and protect it under the connector mutex lock.\n2. Ensure all pending partner tasks are explicitly flushed and finished\nbefore the workqueue is destroyed.\n3. Switch from mod_delayed_work() to a cancel_delayed_work() and\nqueue_delayed_work() sequence. This guarantees that items currently marked\nas pending won't be scheduled an additional time, preventing a double\nrelease of resources which leads to the following crash:\n\n Oops: general protection fault, probably for non-canonical address\n 0xdead000000000122: 0000 [#1] SMP NOPTI\n Workqueue: cros_ec_ucsi.3.auto-con2 ucsi_poll_worker\n RIP: 0010:ucsi_poll_worker+0x65/0x1e0\n Call Trace:\n <TASK>\n process_scheduled_works+0x218/0x6d0\n worker_thread+0x188/0x3f0\n __cfi_worker_thread+0x10/0x10\n kthread+0x226/0x2a0\n\nTo ensure these rules are applied identically across both the normal\nteardown and the ucsi_init() error paths, consolidate the cleanup logic\ninto a new helper, ucsi_unregister_port()."
}
],
"lastModified": "2026-08-23T13:16:43.717",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}