{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74555","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-15T05:44:03.916Z","datePublished":"2026-08-15T12:28:00.729Z","dateUpdated":"2026-08-19T16:38:54.912Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-19T16:38:54.912Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: libsas: Fix HA resume deadlock and hisi_sas disk-wake race\n\nCommit fbefe22811c3 (\"scsi: libsas: Don't always drain event workqueue\nfor HA resume\") introduced sas_resume_ha_no_sync() to avoid a deadlock:\nthe PHYE_RESUME_TIMEOUT handler, running on the HA event workqueue,\ncalls sas_deform_port() -> sas_destruct_devices(), which removes SCSI\ndevices and waits for the host to become runtime-active. But the host\ncannot resume until sas_resume_ha() -> sas_drain_work() returns, and the\ndrain is blocked on that very handler.\n\nHowever skipping the drain reintroduces a race: hisi_sas returns from\nresume before all PHY UP work and libsas discovery work finish. The\ncontroller may then autosuspend while disks are still waking up. The\ndisks issue IO to a suspended controller, the IO fails, and the disks\nget disabled.\n\nFix the deadlock at its source by moving the PHYE_RESUME_TIMEOUT\nnotification to after sas_drain_work(). By then the host resume is about\nto complete, so device removal through device_link no longer blocks on\nthe resume and the cycle is broken.\n\nWith the deadlock gone, restore sas_resume_ha() (the draining variant)\nin hisi_sas and remove sas_resume_ha_no_sync().\n\nThe reorder is safe for the other libsas consumers (isci, pm8001,\naic94xx, mvsas). During suspend, sas_suspend_devices() calls\nsas_notify_lldd_dev_gone() for each device, which sets dev->lldd_dev to\nNULL. When scsi_unblock_requests re-enables I/O in resume, any I/O to a\ntimed-out phy's disk is immediately rejected by the LLDD before reaching\nhardware: isci returns SAS_DEVICE_UNKNOWN (mapped to DID_BAD_TARGET),\nand pm8001 returns SAS_PHY_DOWN (mapped to DID_NO_CONNECT). Both\ncomplete directly via scsi_done() without entering SCSI EH. This is\nidentical in both the old and new ordering since lldd_dev_gone runs\nduring suspend, before resume. The reorder only affects when the\nPHYE_RESUME_TIMEOUT handler runs (synchronized by sas_drain_work()\nvs. asynchronous after resume returns), not whether I/O can reach the\ndevice. aic94xx and mvsas do not register any PM ops and never reach\nthis code path."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/hisi_sas/hisi_sas_v3_hw.c","drivers/scsi/libsas/sas_init.c","include/scsi/libsas.h"],"versions":[{"version":"fbefe22811c3140a686e407e114789ebf328a9a2","lessThan":"09357f067122e2e28ec52e27013a1660a1571618","status":"affected","versionType":"git"},{"version":"fbefe22811c3140a686e407e114789ebf328a9a2","lessThan":"e50a6523a603594a6d92cdecfe11997d639410a3","status":"affected","versionType":"git"},{"version":"fbefe22811c3140a686e407e114789ebf328a9a2","lessThan":"c391b5899dd46485a5893696c12ae3e95a3a7325","status":"affected","versionType":"git"},{"version":"fbefe22811c3140a686e407e114789ebf328a9a2","lessThan":"9e24b47ef81d43b3fb1b14294f09991640c79fcc","status":"affected","versionType":"git"},{"version":"fbefe22811c3140a686e407e114789ebf328a9a2","lessThan":"b9c44a14062093e9fc2d6bddc696cfceadb482d7","status":"affected","versionType":"git"},{"version":"fbefe22811c3140a686e407e114789ebf328a9a2","lessThan":"3dbbbf656b850c9c8de05df6ad4a1dfc6ff02845","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/scsi/hisi_sas/hisi_sas_v3_hw.c","drivers/scsi/libsas/sas_init.c","include/scsi/libsas.h"],"versions":[{"version":"5.17","status":"affected"},{"version":"0","lessThan":"5.17","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":"5.17","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.6.151"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.12.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.18.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"7.1.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/09357f067122e2e28ec52e27013a1660a1571618"},{"url":"https://git.kernel.org/stable/c/e50a6523a603594a6d92cdecfe11997d639410a3"},{"url":"https://git.kernel.org/stable/c/c391b5899dd46485a5893696c12ae3e95a3a7325"},{"url":"https://git.kernel.org/stable/c/9e24b47ef81d43b3fb1b14294f09991640c79fcc"},{"url":"https://git.kernel.org/stable/c/b9c44a14062093e9fc2d6bddc696cfceadb482d7"},{"url":"https://git.kernel.org/stable/c/3dbbbf656b850c9c8de05df6ad4a1dfc6ff02845"}],"title":"scsi: libsas: Fix HA resume deadlock and hisi_sas disk-wake race","x_generator":{"engine":"bippy-1.2.0"}}}}