{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74468","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-15T05:44:03.902Z","datePublished":"2026-08-15T12:27:06.250Z","dateUpdated":"2026-08-19T16:37:12.926Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-19T16:37:12.926Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: pch: use raw_spinlock_t for the register lock\n\npch_irq_type() is registered as the irq_chip .irq_set_type callback and\ntakes chip->spinlock with spin_lock_irqsave().  This callback is reached\nfrom __setup_irq() -> __irq_set_trigger() -> chip->irq_set_type() while\nthe caller holds desc->lock, a raw_spinlock_t, with hardirqs disabled.\nThat context is not sleepable, but on PREEMPT_RT a regular spinlock_t is\nan rtmutex-backed sleeping lock, so acquiring it there is invalid.\n\nThis was confirmed on a PREEMPT_RT kernel with lockdep\n(PROVE_RAW_LOCK_NESTING and DEBUG_ATOMIC_SLEEP).  A grounded PoC mirrored\npch_irq_type()'s locking and drove it through the real genirq carrier\nirq_set_irq_type() -> __irq_set_trigger() -> chip->irq_set_type(), i.e.\nthe same __irq_set_trigger() edge that __setup_irq() takes for a\nrequested IRQ.  With the original spin_lock_irqsave() edge lockdep\nreported an invalid wait context, immediately followed by:\n\n  BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48\n  in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 95, name: insmod\n  hardirqs last disabled at (3784): _raw_spin_lock_irqsave+0x4f/0x60\n   rt_spin_lock+0x3a/0x1c0\n   repro_irq_set_type+0x64/0xa0 [pch_repro]\n   __irq_set_trigger+0x69/0x140\n   irq_set_irq_type+0x78/0xd0\n\nSwitching the mirrored lock to raw_spinlock_t made both splats go away.\n\nConvert the register lock to raw_spinlock_t.  The same lock also\nserializes the GPIO direction/value callbacks and the suspend/resume\nregister save/restore, but all of those critical sections only perform\nMMIO register accesses (ioread32()/iowrite32()) and\nirq_set_handler_locked(); none of them contain sleepable operations.\nKeeping this register lock non-sleeping is therefore appropriate for the\nirqchip callbacks and does not change the GPIO-side locking contract.\n\nThis is the same class of issue and fix as recently addressed for other\nGPIO controllers, e.g. commit 286533cb14a3 (\"gpio: sch: use raw_spinlock_t\nin the irq startup path\") and commit 90f0109019e6 (\"gpio: eic-sprd: use\nraw_spinlock_t in the irq startup path\")."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpio/gpio-pch.c"],"versions":[{"version":"38eb18a6f92da886fc1af509d25e8f7a49e23d9a","lessThan":"efc76a3f5353dd33a2e2ad48200cd4a18de30a0d","status":"affected","versionType":"git"},{"version":"38eb18a6f92da886fc1af509d25e8f7a49e23d9a","lessThan":"935e6872db7faecfbe1a10b3f5d97a62fdff5ec9","status":"affected","versionType":"git"},{"version":"38eb18a6f92da886fc1af509d25e8f7a49e23d9a","lessThan":"98f292cb6d01487d17988d9fd4e19c13e7adb156","status":"affected","versionType":"git"},{"version":"38eb18a6f92da886fc1af509d25e8f7a49e23d9a","lessThan":"16da33cb36e663b6967112185e11d00ce8ff957c","status":"affected","versionType":"git"},{"version":"38eb18a6f92da886fc1af509d25e8f7a49e23d9a","lessThan":"ff050589a21967883bb55f6dba42568f8367ad4a","status":"affected","versionType":"git"},{"version":"38eb18a6f92da886fc1af509d25e8f7a49e23d9a","lessThan":"466ab0c41d5f54f71cee60619d07c4abd0ffd2cd","status":"affected","versionType":"git"},{"version":"38eb18a6f92da886fc1af509d25e8f7a49e23d9a","lessThan":"c0a4ec89fc26e4b679b04f1002c503cb2529acdc","status":"affected","versionType":"git"},{"version":"38eb18a6f92da886fc1af509d25e8f7a49e23d9a","lessThan":"a02b8950d619123da64f69b70fe1dadef217dfe4","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpio/gpio-pch.c"],"versions":[{"version":"3.2","status":"affected"},{"version":"0","lessThan":"3.2","status":"unaffected","versionType":"semver"},{"version":"5.10.265","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.216","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.183","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.151","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.103","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.44","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.8","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"5.10.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.6.151"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.12.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.18.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"7.1.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/efc76a3f5353dd33a2e2ad48200cd4a18de30a0d"},{"url":"https://git.kernel.org/stable/c/935e6872db7faecfbe1a10b3f5d97a62fdff5ec9"},{"url":"https://git.kernel.org/stable/c/98f292cb6d01487d17988d9fd4e19c13e7adb156"},{"url":"https://git.kernel.org/stable/c/16da33cb36e663b6967112185e11d00ce8ff957c"},{"url":"https://git.kernel.org/stable/c/ff050589a21967883bb55f6dba42568f8367ad4a"},{"url":"https://git.kernel.org/stable/c/466ab0c41d5f54f71cee60619d07c4abd0ffd2cd"},{"url":"https://git.kernel.org/stable/c/c0a4ec89fc26e4b679b04f1002c503cb2529acdc"},{"url":"https://git.kernel.org/stable/c/a02b8950d619123da64f69b70fe1dadef217dfe4"}],"title":"gpio: pch: use raw_spinlock_t for the register lock","x_generator":{"engine":"bippy-1.2.0"}}}}