CVE-2026-72063 (GCVE-0-2026-72063)
Vulnerability from cvelistv5 – Published: 2026-08-15 05:52 – Updated: 2026-08-23 12:46
VLAI
EPSS
VEX
Title
gpio: tegra: do not call pinctrl for GPIO direction
Summary
In the Linux kernel, the following vulnerability has been resolved:
gpio: tegra: do not call pinctrl for GPIO direction
tegra_gpio_direction_input() and tegra_gpio_direction_output() already
program the GPIO controller direction registers directly. The additional
pinctrl_gpio_direction_input/output() calls do not add a Tegra pinctrl
operation, because the Tegra pinmux ops provide GPIO request/free
handling but no gpio_set_direction hook.
The extra call still enters the pinctrl core and takes pctldev->mutex.
Shared GPIO users can call the direction path while holding their
per-line spinlock, so this otherwise redundant pinctrl direction call can
sleep in an atomic context.
This was found by our static analysis tool and then confirmed by manual
review of tegra_gpio_probe(), the Tegra GPIO direction callbacks and the
Tegra pinctrl ops. The reviewed path has a default non-sleeping
struct gpio_chip while the direction callback still enters the pinctrl
mutex path.
A directed runtime validation kept the same non-sleeping chip registration
and drove:
gpio_shared_proxy_direction_output()
gpiod_direction_output_raw_commit()
tegra_gpio_direction_output()
pinctrl_gpio_direction_output()
Lockdep reported a sleep-in-atomic warning with the shared GPIO spinlock
held and pinctrl_get_device_gpio_range() plus tegra_gpio_direction_output()
on the stack.
Do not mark the whole chip as can_sleep to paper over this: can_sleep
describes whether get()/set() may sleep, and Tegra value access is MMIO.
Remove the redundant pinctrl direction calls and keep pinctrl involvement
in the existing request/free path.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
11da905412833d9b369a6a09a401f87149d674dc , < 89904b4f1dc0f9550c3f206dcdfceed0b7ce7c49
(git)
Affected: 11da905412833d9b369a6a09a401f87149d674dc , < d3b92d16e1c4debec7526b6dbb2d98d0aeed796b (git) Affected: 11da905412833d9b369a6a09a401f87149d674dc , < 616188becd4a208afbae1653fc5241e1748bae80 (git) Affected: 11da905412833d9b369a6a09a401f87149d674dc , < e57a4845b0da60a7b9f052160878097826320954 (git) Affected: 11da905412833d9b369a6a09a401f87149d674dc , < cd17c5a1d9f186b57e9e2949be427803b7110a5c (git) Affected: 11da905412833d9b369a6a09a401f87149d674dc , < ac761e66708d51dac35c4c7f1891ea991dc788f0 (git) Affected: 11da905412833d9b369a6a09a401f87149d674dc , < 628c63f96f4564fa145f602af2d41daf9532201f (git) Affected: 11da905412833d9b369a6a09a401f87149d674dc , < d3e91a95b2b0fc6336dbf3ec90d831a1654d2720 (git) |
guessed | |
| Linux | Linux |
Affected:
5.1
Unaffected: 0 , < 5.1 (semver) Unaffected: 5.10.266 , ≤ 5.10.* (semver) Unaffected: 5.15.217 , ≤ 5.15.* (semver) Unaffected: 6.1.184 , ≤ 6.1.* (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
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"version": "6.1.184",
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},
{
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}
]
}
],
"cpeApplicability": [
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: tegra: do not call pinctrl for GPIO direction\n\ntegra_gpio_direction_input() and tegra_gpio_direction_output() already\nprogram the GPIO controller direction registers directly. The additional\npinctrl_gpio_direction_input/output() calls do not add a Tegra pinctrl\noperation, because the Tegra pinmux ops provide GPIO request/free\nhandling but no gpio_set_direction hook.\n\nThe extra call still enters the pinctrl core and takes pctldev-\u003emutex.\nShared GPIO users can call the direction path while holding their\nper-line spinlock, so this otherwise redundant pinctrl direction call can\nsleep in an atomic context.\n\nThis was found by our static analysis tool and then confirmed by manual\nreview of tegra_gpio_probe(), the Tegra GPIO direction callbacks and the\nTegra pinctrl ops. The reviewed path has a default non-sleeping\nstruct gpio_chip while the direction callback still enters the pinctrl\nmutex path.\n\nA directed runtime validation kept the same non-sleeping chip registration\nand drove:\n\n gpio_shared_proxy_direction_output()\n gpiod_direction_output_raw_commit()\n tegra_gpio_direction_output()\n pinctrl_gpio_direction_output()\n\nLockdep reported a sleep-in-atomic warning with the shared GPIO spinlock\nheld and pinctrl_get_device_gpio_range() plus tegra_gpio_direction_output()\non the stack.\n\nDo not mark the whole chip as can_sleep to paper over this: can_sleep\ndescribes whether get()/set() may sleep, and Tegra value access is MMIO.\nRemove the redundant pinctrl direction calls and keep pinctrl involvement\nin the existing request/free path."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-23T12:46:39.651Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/89904b4f1dc0f9550c3f206dcdfceed0b7ce7c49"
},
{
"url": "https://git.kernel.org/stable/c/d3b92d16e1c4debec7526b6dbb2d98d0aeed796b"
},
{
"url": "https://git.kernel.org/stable/c/616188becd4a208afbae1653fc5241e1748bae80"
},
{
"url": "https://git.kernel.org/stable/c/e57a4845b0da60a7b9f052160878097826320954"
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"url": "https://git.kernel.org/stable/c/ac761e66708d51dac35c4c7f1891ea991dc788f0"
},
{
"url": "https://git.kernel.org/stable/c/628c63f96f4564fa145f602af2d41daf9532201f"
},
{
"url": "https://git.kernel.org/stable/c/d3e91a95b2b0fc6336dbf3ec90d831a1654d2720"
}
],
"title": "gpio: tegra: do not call pinctrl for GPIO direction",
"x_generator": {
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}
}
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"cveId": "CVE-2026-72063",
"datePublished": "2026-08-15T05:52:17.315Z",
"dateReserved": "2026-08-09T03:40:39.903Z",
"dateUpdated": "2026-08-23T12:46:39.651Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
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"date": "2026-10-20",
"epss": "0.0022",
"percentile": "0.11771"
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{
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: tegra: do not call pinctrl for GPIO direction\n\ntegra_gpio_direction_input() and tegra_gpio_direction_output() already\nprogram the GPIO controller direction registers directly. The additional\npinctrl_gpio_direction_input/output() calls do not add a Tegra pinctrl\noperation, because the Tegra pinmux ops provide GPIO request/free\nhandling but no gpio_set_direction hook.\n\nThe extra call still enters the pinctrl core and takes pctldev-\u003emutex.\nShared GPIO users can call the direction path while holding their\nper-line spinlock, so this otherwise redundant pinctrl direction call can\nsleep in an atomic context.\n\nThis was found by our static analysis tool and then confirmed by manual\nreview of tegra_gpio_probe(), the Tegra GPIO direction callbacks and the\nTegra pinctrl ops. The reviewed path has a default non-sleeping\nstruct gpio_chip while the direction callback still enters the pinctrl\nmutex path.\n\nA directed runtime validation kept the same non-sleeping chip registration\nand drove:\n\n gpio_shared_proxy_direction_output()\n gpiod_direction_output_raw_commit()\n tegra_gpio_direction_output()\n pinctrl_gpio_direction_output()\n\nLockdep reported a sleep-in-atomic warning with the shared GPIO spinlock\nheld and pinctrl_get_device_gpio_range() plus tegra_gpio_direction_output()\non the stack.\n\nDo not mark the whole chip as can_sleep to paper over this: can_sleep\ndescribes whether get()/set() may sleep, and Tegra value access is MMIO.\nRemove the redundant pinctrl direction calls and keep pinctrl involvement\nin the existing request/free path."
}
],
"id": "CVE-2026-72063",
"lastModified": "2026-08-23T13:16:38.950",
"metrics": {},
"published": "2026-08-15T06:21:15.887",
"references": [
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"url": "https://git.kernel.org/stable/c/616188becd4a208afbae1653fc5241e1748bae80"
},
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/628c63f96f4564fa145f602af2d41daf9532201f"
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"url": "https://git.kernel.org/stable/c/ac761e66708d51dac35c4c7f1891ea991dc788f0"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/cd17c5a1d9f186b57e9e2949be427803b7110a5c"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/d3b92d16e1c4debec7526b6dbb2d98d0aeed796b"
},
{
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"url": "https://git.kernel.org/stable/c/d3e91a95b2b0fc6336dbf3ec90d831a1654d2720"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/e57a4845b0da60a7b9f052160878097826320954"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-08-19T05:25:31+00:00",
"cve": "CVE-2026-72063",
"id": "CVE-2026-72063",
"initial_release_date": "2026-08-15T00:00:00+00:00",
"product_status:known_affected": "184",
"product_status:known_not_affected": "90",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: gpio: tegra: do not call pinctrl for GPIO direction",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72063.json",
"version": "3"
}
}
}
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