CVE-2026-53237None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: gpio: mvebu: fix NULL pointer dereference in suspend/resume mvebu_pwm_suspend() and mvebu_pwm_resume() are called for all GPIO banks during suspend/resume, but not all…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.1%
Last analysed / modified upstream
In the Linux kernel, the following vulnerability has been resolved:
gpio: mvebu: fix NULL pointer dereference in suspend/resume
mvebu_pwm_suspend() and mvebu_pwm_resume() are called for all GPIO banks during suspend/resume, but not all banks have PWM functionality. GPIO banks without PWM have mvchip->mvpwm set to NULL.
Calling mvebu_pwm_suspend() with mvpwm == NULL causes a NULL pointer dereference when it tries to access mvpwm->blink_select.
Unable to handle kernel NULL pointer dereference at virtual address 00000020 when write [00000020] *pgd=00000000 Internal error: Oops: 815 [#1] PREEMPT ARM Modules linked in: CPU: 0 UID: 0 PID: 406 Comm: sh Not tainted 6.12.74-rt12-yocto-standard-g4e96f98fb7db-dirty #353 Hardware name: Marvell Armada 370/XP (Device Tree) PC is at regmap_mmio_read+0x38/0x54 LR is at regmap_mmio_read+0x38/0x54 pc : [<c05fd2ac>] lr : [<c05fd2ac>] psr: 200f0013 sp : f0c11d10 ip : 00000000 fp : c100d2f0 r10: c14fb854 r9 : 00000000 r8 : 00000000 r7 : c1799c00 r6 : 00000020 r5 : 00000020 r4 : c179c7c0 r3 : f0a231a0 r2 : 00000020 r1 : 00000020 r0 : 00000000 Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 10c5387d Table: 135ec059 DAC: 00000051 Call trace: regmap_mmio_read from _regmap_bus_reg_read+0x78/0xac _regmap_bus_reg_read from _regmap_read+0x60/0x154 _regmap_read from regmap_read+0x3c/0x60 regmap_read from mvebu_gpio_suspend+0xa4/0x14c mvebu_gpio_suspend from dpm_run_callback+0x54/0x180 dpm_run_callback from device_suspend+0x124/0x630 device_suspend from dpm_suspend+0x124/0x270 dpm_suspend from dpm_suspend_start+0x64/0x6c dpm_suspend_start from suspend_devices_and_enter+0x140/0x8e8 suspend_devices_and_enter from pm_suspend+0x2fc/0x308 pm_suspend from state_store+0x6c/0xc8 state_store from kernfs_fop_write_iter+0x10c/0x1f8 kernfs_fop_write_iter from vfs_write+0x270/0x468 vfs_write from ksys_write+0x70/0xf0 ksys_write from ret_fast_syscall+0x0/0x54
Add a NULL check for mvchip->mvpwm before calling the PWM suspend/resume functions.
Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < 3cb53f89049c3769e102ac5b7692e679a1d45510Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < 7db09011ce62162d72897fc4856b4425245dfe35Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < 4ef24338eda3c7e96d6f94a988266ff16ed3985dLinux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < 6136c1474db88272231573e222896e1998d34662Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < c9677a9274ffb44987ec209dc8ec9f2d34946956Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < b9ad50d7505ebd48282ec3630258dc820fc85c81Linux 4.12Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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