# CVE-2026-68396: scsi: core: wake eh reliably when using scsi_schedule_eh

Status: published. Published: 2026-08-10. Updated: 2026-11-06.

In the Linux kernel, the following vulnerability has been resolved:

scsi: core: wake eh reliably when using scsi_schedule_eh

Drivers which use the scsi_schedule_eh function to run the error handler
currently risk the error handler thread never waking once all commands are
timed out or inactive. There is no enforced memory order between setting
the host into error recovery state and counting busy commands. This can
result in a race with scsi_dec_host_busy where neither CPU sees both
conditions of all commands inactive and the host error state to request
waking the error handler.

To fix this, run the scsi_schedule_eh's scsi_eh_wakeup from a new work item
which will use rcu to ensure scsi_schedule_eh's call to scsi_host_busy will
occur after the error state is globally visible and will be seen by any
current scsi_dec_host_busy callers.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 6eb045e092efefafc6687409a6fa6d1dabf0fb69; < d1280822db11c423ad47b43c9d69a5e56199161e (affected, git); ≥ 6eb045e092efefafc6687409a6fa6d1dabf0fb69; < 4827c824a203eea2c0aa5bfdb13d5c5038cc84da (affected, git); ≥ 6eb045e092efefafc6687409a6fa6d1dabf0fb69; < 866efe8ae8b8b4d095501001b026e1022734be28 (affected, git); ≥ 6eb045e092efefafc6687409a6fa6d1dabf0fb69; < c7a15091237205770bd9bd4d14eb1f3029d97a34 (affected, git); ≥ 6eb045e092efefafc6687409a6fa6d1dabf0fb69; < 24d7abda6a2a19e113334accc10029f6a4b57257 (affected, git); ≥ 6eb045e092efefafc6687409a6fa6d1dabf0fb69; < dccf3b1798b70f94e958b3d00b83010399e6fb05 (affected, git). Source: CNA: Linux
- Linux / Linux: 5.5 (affected); ≥ 0; < 5.5 (unaffected, semver); ≥ 6.1.191; ≤ 6.1.* (unaffected, semver); ≥ 6.6.160; ≤ 6.6.* (unaffected, semver); ≥ 6.12.101; ≤ 6.12.* (unaffected, semver); ≥ 6.18.42; ≤ 6.18.* (unaffected, semver); ≥ 7.1.6; ≤ 7.1.* (unaffected, semver); ≥ 7.2; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.21% as of 2026-11-06; percentile 10.62%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/d1280822db11c423ad47b43c9d69a5e56199161e (CNA: Linux)

- https://git.kernel.org/stable/c/4827c824a203eea2c0aa5bfdb13d5c5038cc84da (CNA: Linux)

- https://git.kernel.org/stable/c/866efe8ae8b8b4d095501001b026e1022734be28 (CNA: Linux)

- https://git.kernel.org/stable/c/c7a15091237205770bd9bd4d14eb1f3029d97a34 (CNA: Linux)

- https://git.kernel.org/stable/c/24d7abda6a2a19e113334accc10029f6a4b57257 (CNA: Linux)

- https://git.kernel.org/stable/c/dccf3b1798b70f94e958b3d00b83010399e6fb05 (CNA: Linux)

- https://git.kernel.org/stable/c/24d7abda6a2a19e113334accc10029f6a4b57257 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/4827c824a203eea2c0aa5bfdb13d5c5038cc84da (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/866efe8ae8b8b4d095501001b026e1022734be28 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/c7a15091237205770bd9bd4d14eb1f3029d97a34 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/d1280822db11c423ad47b43c9d69a5e56199161e (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/dccf3b1798b70f94e958b3d00b83010399e6fb05 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-68396; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-68396; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-68396; retrieved 2026-11-06; source updated Not reported

Revision: ddd061b4dcd3f93f443bd7599480d3656cdff7934598536f469baf9889a25b35

Canonical: https://y2.dev/cve/CVE-2026-68396

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