{"id":"CVE-2026-53237","state":"PUBLISHED","title":"gpio: mvebu: fix NULL pointer dereference in suspend/resume","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.","publishedAt":"2026-06-25T08:39:33.833Z","updatedAt":"2026-10-30T12:26:49.393Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"757642f9a584e893f3f4e50c99b674ee8a3ed363","status":"affected","lessThan":"3cb53f89049c3769e102ac5b7692e679a1d45510","versionType":"git"},{"version":"757642f9a584e893f3f4e50c99b674ee8a3ed363","status":"affected","lessThan":"7db09011ce62162d72897fc4856b4425245dfe35","versionType":"git"},{"version":"757642f9a584e893f3f4e50c99b674ee8a3ed363","status":"affected","lessThan":"4ef24338eda3c7e96d6f94a988266ff16ed3985d","versionType":"git"},{"version":"757642f9a584e893f3f4e50c99b674ee8a3ed363","status":"affected","lessThan":"6136c1474db88272231573e222896e1998d34662","versionType":"git"},{"version":"757642f9a584e893f3f4e50c99b674ee8a3ed363","status":"affected","lessThan":"c9677a9274ffb44987ec209dc8ec9f2d34946956","versionType":"git"},{"version":"757642f9a584e893f3f4e50c99b674ee8a3ed363","status":"affected","lessThan":"b9ad50d7505ebd48282ec3630258dc820fc85c81","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpio/gpio-mvebu.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.143","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.94","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.36","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.13","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpio/gpio-mvebu.c"]}],"references":["https://git.kernel.org/stable/c/3cb53f89049c3769e102ac5b7692e679a1d45510","https://git.kernel.org/stable/c/7db09011ce62162d72897fc4856b4425245dfe35","https://git.kernel.org/stable/c/4ef24338eda3c7e96d6f94a988266ff16ed3985d","https://git.kernel.org/stable/c/6136c1474db88272231573e222896e1998d34662","https://git.kernel.org/stable/c/c9677a9274ffb44987ec209dc8ec9f2d34946956","https://git.kernel.org/stable/c/b9ad50d7505ebd48282ec3630258dc820fc85c81"],"weaknesses":[],"ingestedAt":"2026-10-30T12:44:04.813Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53237.json","commit":"db8103c5921aac81d5d90efcf3745980dafabf49","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53237","state":"PUBLISHED","datePublished":"2026-06-25T08:39:33.833Z","dateUpdated":"2026-10-30T12:26:49.393Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.393Z"},"containers":{"cna":{"title":"gpio: mvebu: fix NULL pointer dereference in suspend/resume","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"757642f9a584e893f3f4e50c99b674ee8a3ed363","status":"affected","lessThan":"3cb53f89049c3769e102ac5b7692e679a1d45510","versionType":"git"},{"version":"757642f9a584e893f3f4e50c99b674ee8a3ed363","status":"affected","lessThan":"7db09011ce62162d72897fc4856b4425245dfe35","versionType":"git"},{"version":"757642f9a584e893f3f4e50c99b674ee8a3ed363","status":"affected","lessThan":"4ef24338eda3c7e96d6f94a988266ff16ed3985d","versionType":"git"},{"version":"757642f9a584e893f3f4e50c99b674ee8a3ed363","status":"affected","lessThan":"6136c1474db88272231573e222896e1998d34662","versionType":"git"},{"version":"757642f9a584e893f3f4e50c99b674ee8a3ed363","status":"affected","lessThan":"c9677a9274ffb44987ec209dc8ec9f2d34946956","versionType":"git"},{"version":"757642f9a584e893f3f4e50c99b674ee8a3ed363","status":"affected","lessThan":"b9ad50d7505ebd48282ec3630258dc820fc85c81","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpio/gpio-mvebu.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.143","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.94","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.36","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.13","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpio/gpio-mvebu.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:26:49.393Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.6.143"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.12.94"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.18.36"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"7.0.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}