scsi: libsas: Fix HA resume deadlock and hisi_sas disk-wake race
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 I/O in resume, any I/O to a timed-out phy's disk is immediately rejected by the LLDD before reaching hardware: isci returns SAS_DEVICE_UNKNOWN (mapped to DID_BAD_TARGET), and pm8001 returns SAS_PHY_DOWN (mapped to DID_NO_CONNECT). Both complete directly via scsi_done() without entering SCSI EH. This is identical in both the old and new ordering since lldd_dev_gone runs during suspend, before resume. The reorder only affects when the PHYE_RESUME_TIMEOUT handler runs (synchronized by sas_drain_work() vs. asynchronous after resume returns), not whether I/O can reach the device. aic94xx and mvsas do not register any PM ops and never reach this code path.
- Published
- Aug 15, 2026
- Updated
- Aug 19, 2026
- EPSS
- 0.2% · 11th percentile
- CWE
- —
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Report tools
Action score
0
Monitor
Low priority for now.
- CVSS
- 0 / 40 · —
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
Noroxi analysis
No Noroxi analysis for this record yet
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We use this product, ask for helpAffected systems
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Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 5.17affected
- fbefe22811c3140a686e407e114789ebf328a9a2 and later · before 09357f067122e2e28ec52e27013a1660a1571618affected · git
- fbefe22811c3140a686e407e114789ebf328a9a2 and later · before e50a6523a603594a6d92cdecfe11997d639410a3affected · git
- fbefe22811c3140a686e407e114789ebf328a9a2 and later · before c391b5899dd46485a5893696c12ae3e95a3a7325affected · git
- fbefe22811c3140a686e407e114789ebf328a9a2 and later · before 9e24b47ef81d43b3fb1b14294f09991640c79fccaffected · git
- fbefe22811c3140a686e407e114789ebf328a9a2 and later · before b9c44a14062093e9fc2d6bddc696cfceadb482d7affected · git
- fbefe22811c3140a686e407e114789ebf328a9a2 and later · before 3dbbbf656b850c9c8de05df6ad4a1dfc6ff02845affected · git
- before 5.17not affected · semver
- 6.1.183 and later · up to and including 6.1.*not affected · semver
- 6.6.151 and later · up to and including 6.6.*not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.187-1 | 6.1.187-1 |
| Debian:12 | linux-6.12 | before 6.12.107-1~deb12u1 | 6.12.107-1~deb12u1 |
| Debian:13 | linux | before 6.12.105-1 | 6.12.105-1 |
| Debian:14 | linux | before 7.1.8-1 | 7.1.8-1 |
Same product
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Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 09357f067122e2e28ec52e27013a1660a1571618 | Vendor (CNA) |
| Linux Linux | 3dbbbf656b850c9c8de05df6ad4a1dfc6ff02845 | Vendor (CNA) |
| Linux Linux | 9e24b47ef81d43b3fb1b14294f09991640c79fcc | Vendor (CNA) |
| Linux Linux | b9c44a14062093e9fc2d6bddc696cfceadb482d7 | Vendor (CNA) |
| Linux Linux | c391b5899dd46485a5893696c12ae3e95a3a7325 | Vendor (CNA) |
| Linux Linux | e50a6523a603594a6d92cdecfe11997d639410a3 | Vendor (CNA) |
| debian:linux | 6.1.187-1 · Debian:12 | Package registry (OSV) |
| debian:linux-6.12 | 6.12.107-1~deb12u1 · Debian:12 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
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No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
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No commit or PR link among the references.
Credits
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No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
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Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-26-0854 · Aug 19, 2026(Linux Kernel Güvenlik Bildirimi)
Technical details
No CVSS vector for this record, so attack conditions can't be derived.
Weakness class (CWE)
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Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/09357f067122e2e28ec52e27013a1660a1571618
- git.kernel.org/stable/c/3dbbbf656b850c9c8de05df6ad4a1dfc6ff02845
- git.kernel.org/stable/c/9e24b47ef81d43b3fb1b14294f09991640c79fcc
- git.kernel.org/stable/c/b9c44a14062093e9fc2d6bddc696cfceadb482d7
- git.kernel.org/stable/c/c391b5899dd46485a5893696c12ae3e95a3a7325
- git.kernel.org/stable/c/e50a6523a603594a6d92cdecfe11997d639410a3
Vendor advisories and official records. Exploit/PoC links are deliberately left out.