{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-99202", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.400Z", "datePublished": "2026-10-28T10:35:56.827Z", "dateUpdated": "2026-10-28T10:35:56.827Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-28T10:35:56.827Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: libsas: Fix SMP IO deadlock during HA resume\n\nsmp_execute_task_sg() calls pm_runtime_get_sync() on the host before\nissuing an SMP command. When that command is itself issued from the HA\nresume path, the get_sync() deadlocks: it waits for the ongoing resume\n(the device is RPM_RESUMING), while the resume is blocked in\nsas_drain_work() waiting for that same SMP IO to complete.\n\nThe deadlock needs an expander-attached SATA disk. During\nsas_resume_ha() -> sas_drain_work(), DISCE_RESUME -> sas_resume_sata()\n-> ata_sas_port_resume() requests ATA_EH_RESET, and the hard reset for\nsuch a disk is done via SMP PHY CONTROL (sas_ata_hard_reset() ->\nsas_phy_reset() -> sas_smp_phy_control() ->\nsmp_execute_task_sg()). Direct-attached SATA resets through\nlldd_control_phy() and SSP devices use TMFs, so neither hits this.\n\nReplace the get_sync()/put_sync() pair with\npm_runtime_get_noresume()/pm_runtime_put(). smp_execute_task_sg() only\nneeds to hold off autosuspend while the SMP is in flight, and it must\nnot try to resume the host: a sync resume issued from the HA resume path\nitself is what deadlocks, and by the time sas_resume_ha() runs, hw_init\nhas already reinitialized the hardware, so the device is accessible\nwithout one.\n\nThe usage reference is still required. Discovery work normally runs\ninside an event worker's PM reference, taken at sas_notify_port_event()\nnotify time and held until the handler has flushed the disco\nqueue. sas_rediscover_ex_phy() however requeues DISCE_REVALIDATE_DOMAIN\nfrom within the revalidation worker itself, and flush_workqueue() does\nnot wait for work items queued during execution, so that chained\nrevalidation runs with no outer PM reference - without the\nget_noresume(), its SMP could race autosuspend.\n\nFor the BSG path, sas_smp_handler() is the only caller which may find\nthe host autosuspended: expander SMP requests do not go through any SCSI\ndevice request queue, so nothing else in that path holds the host\nawake. Resume it there with pm_runtime_resume_and_get() and check the\nresult." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/libsas/sas_expander.c" ], "versions": [ { "version": "9e24b47ef81d43b3fb1b14294f09991640c79fcc", "lessThan": "c9fb89246d9922ac0a45d504adb03e0bb971310c", "status": "affected", "versionType": "git" }, { "version": "3dbbbf656b850c9c8de05df6ad4a1dfc6ff02845", "lessThan": "08b95ef36a64c3ae4490794bed3c35d0c3354e85", "status": "affected", "versionType": "git" }, { "version": "3dbbbf656b850c9c8de05df6ad4a1dfc6ff02845", "lessThan": "81e097a064b28b4a1f6ca1a8b433e659c1bd64c0", "status": "affected", "versionType": "git" }, { "version": "09357f067122e2e28ec52e27013a1660a1571618", "status": "affected", "versionType": "git" }, { "version": "e50a6523a603594a6d92cdecfe11997d639410a3", "status": "affected", "versionType": "git" }, { "version": "c391b5899dd46485a5893696c12ae3e95a3a7325", "status": "affected", "versionType": "git" }, { "version": "b9c44a14062093e9fc2d6bddc696cfceadb482d7", "status": "affected", "versionType": "git" }, { "version": "6.18.44", "lessThan": "6.18.59", "status": "affected", "versionType": "semver" }, { "version": "6.1.183", "lessThan": "6.2", "status": "affected", "versionType": "semver" }, { "version": "6.6.151", "lessThan": "6.7", "status": "affected", "versionType": "semver" }, { "version": "6.12.103", "lessThan": "6.13", "status": "affected", "versionType": "semver" }, { "version": "7.1.8", "lessThan": "7.2", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/libsas/sas_expander.c" ], "versions": [ { "version": "7.2", "status": "affected" }, { "version": "0", "lessThan": "7.2", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.59", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.13", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "6.18.44", "versionEndExcluding": "6.18.59" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.2", "versionEndExcluding": "7.2.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.2", "versionEndExcluding": "7.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.183" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.151" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.103" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1.8" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/c9fb89246d9922ac0a45d504adb03e0bb971310c" }, { "url": "https://git.kernel.org/stable/c/08b95ef36a64c3ae4490794bed3c35d0c3354e85" }, { "url": "https://git.kernel.org/stable/c/81e097a064b28b4a1f6ca1a8b433e659c1bd64c0" } ], "title": "scsi: libsas: Fix SMP IO deadlock during HA resume", "x_generator": { "engine": "bippy-1.2.0" } } } }