Linux Kernel up to 6.6.147/6.12.96/6.18.39/7.1.4 Tegra GPIO race condition

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5.3	$0-$5k	0.98-

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.6.147/6.12.96/6.18.39/7.1.4. This impacts the function tegra_gpio_direction_input/tegra_gpio_direction_output of the component Tegra GPIO. Such manipulation leads to race condition. This vulnerability is documented as CVE-2026-72063. The attack needs to be performed locally. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.6.147/6.12.96/6.18.39/7.1.4. Affected by this issue is the function tegra_gpio_direction_input/tegra_gpio_direction_output of the component Tegra GPIO. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is availability. CVE summarizes:

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.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2026-72063 since 08/09/2026. The exploitation is known to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available.

Upgrading to version 6.6.148, 6.12.97, 6.18.40, 7.1.5 or 7.2-rc1 eliminates this vulnerability. Applying the patch e57a4845b0da60a7b9f052160878097826320954/cd17c5a1d9f186b57e9e2949be427803b7110a5c/ac761e66708d51dac35c4c7f1891ea991dc788f0/628c63f96f4564fa145f602af2d41daf9532201f/d3e91a95b2b0fc6336dbf3ec90d831a1654d2720 is able to eliminate this problem.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.6.147
• 6.12.0
• 6.12.1
• 6.12.2
• 6.12.3
• 6.12.4
• 6.12.5
• 6.12.6
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• 6.12.94
• 6.12.95
• 6.12.96
• 6.18.0
• 6.18.1
• 6.18.2
• 6.18.3
• 6.18.4
• 6.18.5
• 6.18.6
• 6.18.7
• 6.18.8
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• 6.18.37
• 6.18.38
• 6.18.39
• 7.1.0
• 7.1.1
• 7.1.2
• 7.1.3
• 7.1.4

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.148/6.12.97/6.18.40/7.1.5/7.2-rc1
Patch: e57a4845b0da60a7b9f052160878097826320954/cd17c5a1d9f186b57e9e2949be427803b7110a5c/ac761e66708d51dac35c4c7f1891ea991dc788f0/628c63f96f4564fa145f602af2d41daf9532201f/d3e91a95b2b0fc6336dbf3ec90d831a1654d2720

Timelineinfo

08/09/2026 CVE reserved
08/15/2026 +6 days Advisory disclosed
08/15/2026 +0 days VulDB entry created
08/15/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-72063 (🔒)
GCVE (CVE): GCVE-0-2026-72063
GCVE (VulDB): GCVE-100-390476

Entryinfo

Created: 08/15/2026 11:45
Changes: 08/15/2026 11:45 (59)
Complete: 🔍
Cache ID: 216::103

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