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CVE-2026-74555

N/A ALL-YEARS

Published 2026-08-15 · Last modified 2026-08-19 · Linux · NVD: Received

In the Linux kernel, the following vulnerability has been resolved: scsi: libsas: Fix HA resume deadlock and hisi_sas disk-wake race Commit fbefe22811c3 ("scsi: libsas: Don't always drain event workqueue for HA resume") introduced sas_resume_ha_no_sync() to avoid a deadlock: the PHYE_RESUME_TIMEOUT handler, running on the HA event workqueue, calls sas_deform_port() -> sas_destruct_devices(), which removes SCSI devices and waits for the host to become runtime-active. But the host cannot resume until sas_resume_ha() -> sas_drain_work() returns, and the drain is blocked on that very handler. However skipping the drain reintroduces a race: hisi_sas returns from resume before all PHY UP work and libsas discovery work finish. The controller may then autosuspend while disks are still waking up. The disks issue IO to a suspended controller, the IO fails, and the disks get disabled. Fix the deadlock at its source by moving the PHYE_RESUME_TIMEOUT notification to after sas_drain_work(). By then the host resume is about to complete, so device removal through device_link no longer blocks on the resume and the cycle is broken. With the deadlock gone, restore sas_resume_ha() (the draining variant) in hisi_sas and remove sas_resume_ha_no_sync(). The reorder is safe for the other libsas consumers (isci, pm8001, aic94xx, mvsas). During suspend, sas_suspend_devices() calls sas_notify_lldd_dev_gone() for each device, which sets dev->lldd_dev to NULL. When scsi_unblock_requests re-enables

LIMITED SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.2%chance of exploitation in 30 days · 5th percentile

○ In CISA KEV○ Catalogued PoC

Impact if exploited

—CVSS · not scored

  • No impact metrics

Proof of concept

No public PoC is currently catalogued.

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Affected

Vendors Linux

Products Linux

Weakness (CWE)

Not classified.

CVSS vector

Not yet scored.

References and research data (JSON)

Vendor product assessments

Showing 32 of 274 vendor product statements; 242 omitted. Read the full vendor advisory.

  • kernel as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel

    • none available: Fix deferred
    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-64k-debug-devel-matched as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-64k-debug-devel-matched

    • none available: Fix deferred
    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-64k-modules as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-64k-modules

    • none available: Fix deferred
    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-debug-core as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-debug-core

    • none available: Fix deferred
    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-debug-uki-virt as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-debug-uki-virt

    • none available: Fix deferred
    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-modules-extra as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-modules-extra

    • none available: Fix deferred
    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-rt-64k-debug-core as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-64k-debug-core

    • none available: Fix deferred
    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-rt-64k-modules as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-64k-modules

    • none available: Fix deferred
    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-rt-debug-core as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-debug-core

    • none available: Fix deferred
    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-rt-devel as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-devel

    • none available: Fix deferred
    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-tools-libs as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-tools-libs

    • none available: Fix deferred
    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-zfcpdump-devel as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-zfcpdump-devel

    • none available: Fix deferred
    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • libperf as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/libperf

    • none available: Fix deferred
    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-abi-whitelists as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-abi-whitelists

    • no fix planned: Out of support scope
    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-firmware as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-firmware

    • no fix planned: Out of support scope
    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • python-perf as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/python-perf

    • no fix planned: Out of support scope
    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • bpftool as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/bpftool

    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-rt-debug as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-debug

    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-tools-libs-devel as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-tools-libs-devel

    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-debug-modules as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-debug-modules

    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-rt-debug as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-debug

    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-rt-selftests-internal as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-selftests-internal

    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel.src as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel?arch=src

    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-64k-debug-modules-core as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-64k-debug-modules-core

    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-cross-headers as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-cross-headers

    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-devel as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-devel

    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-rt-64k-core as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-64k-core

    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-rt-64k-devel-matched as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-64k-devel-matched

    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-rt-debug-kvm as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-debug-kvm

    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-rt-modules-partner as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-modules-partner

    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • kernel-zfcpdump-devel-matched as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-zfcpdump-devel-matched

    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00
  • rv as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/rv

    Red Hat · CVE-2026-74555 · Updated 2026-08-19T05:25:42+00:00

References

Advisories

Technical & other

Sources: NVD · CVE.org · All sources and attribution · EPSS