{"id":"CVE-2026-53237","title":"gpio: mvebu: fix NULL pointer dereference in suspend/resume","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: mvebu: fix NULL pointer dereference in suspend/resume\n\nmvebu_pwm_suspend() and mvebu_pwm_resume() are called for all GPIO\nbanks during suspend/resume, but not all…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < 3cb53f89049c3769e102ac5b7692e679a1d45510","Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < 7db09011ce62162d72897fc4856b4425245dfe35","Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < 4ef24338eda3c7e96d6f94a988266ff16ed3985d","Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < 6136c1474db88272231573e222896e1998d34662","Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < c9677a9274ffb44987ec209dc8ec9f2d34946956","Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < b9ad50d7505ebd48282ec3630258dc820fc85c81","Linux 4.12"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:23:17.082558Z"},"published":"2026-06-25","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:24:08.415Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53237","references":[{"url":"https://git.kernel.org/stable/c/3cb53f89049c3769e102ac5b7692e679a1d45510"},{"url":"https://git.kernel.org/stable/c/7db09011ce62162d72897fc4856b4425245dfe35"},{"url":"https://git.kernel.org/stable/c/4ef24338eda3c7e96d6f94a988266ff16ed3985d"},{"url":"https://git.kernel.org/stable/c/6136c1474db88272231573e222896e1998d34662"},{"url":"https://git.kernel.org/stable/c/c9677a9274ffb44987ec209dc8ec9f2d34946956"},{"url":"https://git.kernel.org/stable/c/b9ad50d7505ebd48282ec3630258dc820fc85c81"}],"tags":["cve.org"],"epss":0.00123,"epssPercentile":0.02034,"ingestedAt":"2026-11-05T15:02:32.368Z","slug":"CVE-2026-53237","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ngpio: mvebu: fix NULL pointer dereference in suspend/resume\n\nmvebu_pwm_suspend() and mvebu_pwm_resume() are called for all GPIO\nbanks during suspend/resume, but not all banks have PWM functionality.\nGPIO banks without PWM have mvchip->mvpwm set to NULL.\n\nCalling mvebu_pwm_suspend() with mvpwm == NULL causes a NULL pointer\ndereference when it tries to access mvpwm->blink_select.\n\n  Unable to handle kernel NULL pointer dereference at virtual address 00000020 when write\n  [00000020] *pgd=00000000\n  Internal error: Oops: 815 [#1] PREEMPT ARM\n  Modules linked in:\n  CPU: 0 UID: 0 PID: 406 Comm: sh Not tainted 6.12.74-rt12-yocto-standard-g4e96f98fb7db-dirty #353\n  Hardware name: Marvell Armada 370/XP (Device Tree)\n  PC is at regmap_mmio_read+0x38/0x54\n  LR is at regmap_mmio_read+0x38/0x54\n  pc : [<c05fd2ac>]    lr : [<c05fd2ac>]    psr: 200f0013\n  sp : f0c11d10  ip : 00000000  fp : c100d2f0\n  r10: c14fb854  r9 : 00000000  r8 : 00000000\n  r7 : c1799c00  r6 : 00000020  r5 : 00000020  r4 : c179c7c0\n  r3 : f0a231a0  r2 : 00000020  r1 : 00000020  r0 : 00000000\n  Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none\n  Control: 10c5387d  Table: 135ec059  DAC: 00000051\n  Call trace:\n   regmap_mmio_read from _regmap_bus_reg_read+0x78/0xac\n   _regmap_bus_reg_read from _regmap_read+0x60/0x154\n   _regmap_read from regmap_read+0x3c/0x60\n   regmap_read from mvebu_gpio_suspend+0xa4/0x14c\n   mvebu_gpio_suspend from dpm_run_callback+0x54/0x180\n   dpm_run_callback from device_suspend+0x124/0x630\n   device_suspend from dpm_suspend+0x124/0x270\n   dpm_suspend from dpm_suspend_start+0x64/0x6c\n   dpm_suspend_start from suspend_devices_and_enter+0x140/0x8e8\n   suspend_devices_and_enter from pm_suspend+0x2fc/0x308\n   pm_suspend from state_store+0x6c/0xc8\n   state_store from kernfs_fop_write_iter+0x10c/0x1f8\n   kernfs_fop_write_iter from vfs_write+0x270/0x468\n   vfs_write from ksys_write+0x70/0xf0\n   ksys_write from ret_fast_syscall+0x0/0x54\n\nAdd a NULL check for mvchip->mvpwm before calling the PWM\nsuspend/resume functions.\n\n## Affected\n\n- `Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < 3cb53f89049c3769e102ac5b7692e679a1d45510`\n- `Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < 7db09011ce62162d72897fc4856b4425245dfe35`\n- `Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < 4ef24338eda3c7e96d6f94a988266ff16ed3985d`\n- `Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < 6136c1474db88272231573e222896e1998d34662`\n- `Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < c9677a9274ffb44987ec209dc8ec9f2d34946956`\n- `Linux >= 757642f9a584e893f3f4e50c99b674ee8a3ed363 < b9ad50d7505ebd48282ec3630258dc820fc85c81`\n- `Linux 4.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}