{"id":"CVE-2026-53237","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-53237","generatedAt":"2026-10-28T01:43:51.900Z","title":"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…","description":"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 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.","published":"2026-06-25T09:16:42.000Z","lastModified":"2026-07-08T13:13:23.000Z","status":"Analyzed","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-476"],"affected":["linux/linux kernel"],"epss":{"score":0.00122,"percentile":0.01949,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.12%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/4ef24338eda3c7e96d6f94a988266ff16ed3985d","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6136c1474db88272231573e222896e1998d34662","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7db09011ce62162d72897fc4856b4425245dfe35","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b9ad50d7505ebd48282ec3630258dc820fc85c81","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c9677a9274ffb44987ec209dc8ec9f2d34946956","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53237","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}