CVE-2025-38335 [Medium] | Security Vulnerability in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: Input: gpio-keys - fix a sleep while atomic with PREEMPT_RT When enabling PREEMPT_RT, the gpio_keys_irq_timer() callback runs in hard irq context, but the input_event() takes a spin_lock, which isn't allowed there as it is converted to a rt_spin_lock(). [ 4054.289999] BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48 [ 4054.290028] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 0, name: swapper/0 ... [ 4054.290195] __might_resched+0x13c/0x1f4 [ 4054.290209] rt_spin_lock+0x54/0x11c [ 4054.290219] input_event+0x48/0x80 [ 4054.290230] gpio_keys_irq_timer+0x4c/0x78 [ 4054.290243] __hrtimer_run_queues+0x1a4/0x438 [ 4054.290257] hrtimer_interrupt+0xe4/0x240 [ 4054.290269] arch_timer_handler_phys+0x2c/0x44 [ 4054.290283] handle_percpu_devid_irq+0x8c/0x14c [ 4054.290297] handle_irq_desc+0x40/0x58 [ 4054.290307] generic_handle_domain_irq+0x1c/0x28 [ 4054.290316] gic_handle_irq+0x44/0xcc Considering the gpio_keys_irq_isr() can run in any context, e.g. it can be threaded, it seems there's no point in requesting the timer isr to run in hard irq context. Relax the hrtimer not to use the hard context.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-05-06	0.04%	0.08%	+0.03%
2	2025-12-06	0.07%	0.04%	-0.02%
3	2025-11-21	—	0.07%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-05-06

0.04%

0.08%

+0.03%

2025-12-06

0.07%

0.04%

-0.02%

2025-11-21

—

0.07%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	3.6	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.5

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

3.6

[email protected]

OS Trackers for CVE-2025-38335

vendor	priority	summary	link
`debian`	unimportant	CVE-2025-38335 unimportant priority: Debian including 2 source packages (linux, linux-6.1), 6 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 6.	https://security-tracker.debian.org/tracker/CVE-2025-38335
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2025-38335
`suse`	medium	CVE-2025-38335 severity moderate: SUSE including 475 source package names (2.1.3-6.67:kernel-default-base-6.4.0-32.1.21.10, 2.1.3-7.44:kernel-default-6.4.0-32.1, …), 1102 product×package rows across 216 product lines (Container suse/sl-micro/6.0/base-os-container, Container suse/sl-micro/6.0/kvm-os-container, … (216 product lines)): Fixed 627, Known Affected 231, Known Not Affected 223, First Fixed 21.	https://www.suse.com/security/cve/CVE-2025-38335/
`ubuntu`	medium	CVE-2025-38335 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1548 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1142, released 169, ignored 166, not-affected 63, needed 4, needs-triage 2, pending 2.	https://ubuntu.com/security/CVE-2025-38335

Affected software / configurations for CVE-2025-38335

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 5.13, < 5.15.190	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 6.1.148	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.2, < 6.6.101	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.7, < 6.12.41	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.13, < 6.15.4	cpe:2.3:o:linux:linux_kernel::::::::
debian	debian_linux	11.0	cpe:2.3:o:debian:debian_linux:11.0:::::::*

References for CVE-2025-38335

URL	Tags
https://git.kernel.org/stable/c/664e5a6f541ff226621487d1280d2ec28e86be28	Patch
https://git.kernel.org/stable/c/a7b79db25846459de63ca8974268f0c41c734c4b	Patch
https://git.kernel.org/stable/c/a8f01e51109f77229e426b57c5d19251b462c6aa	Patch
https://git.kernel.org/stable/c/ec8f5da79b425deef5aebacdd4fe645620cd4f0b	Patch
https://git.kernel.org/stable/c/f4a8f561d08e39f7833d4a278ebfb12a41eef15f	Patch
https://git.kernel.org/stable/c/fa53beab4740c4e5fe969f218a379f9558be33dc	Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	Third Party Advisory

URL

CVE-2025-38335 | Input: gpio-keys - fix a sleep while atomic with PREEMPT_RT

Exploit prediction scoring system (EPSS) score for CVE-2025-38335

Common vulnerability scoring system (CVSS) metrics for CVE-2025-38335

Weakness enumeration for CVE-2025-38335

OS Trackers for CVE-2025-38335

Affected software / configurations for CVE-2025-38335

References for CVE-2025-38335