CVE-2026-74593

UNRATEDCVSS · not yet scoredTrending — 5 sources updated this week
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EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS v2: —Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

sched_ext: Take cgroup_lock() first in scx_cgroup_lock()

scx_cgroup_lock() write-locks scx_cgroup_ops_rwsem and then takes cgroup_lock(), which can deadlock through kernfs:

scx enable/disable cgroup rmdir cpu.weight write ------------------ ------------ ---------------- cgroup_lock() percpu_down_write(rwsem) cgroup_lock() kernfs_get_active() percpu_down_read(rwsem) kernfs_drain()

The enable path waits for the rmdir to release cgroup_mutex. The rmdir, deactivating the cpu controller's files, waits in kernfs_drain() for the write's active reference. The write, in scx_group_set_weight(), waits for the rwsem behind the pending writer.

Take cgroup_lock() first. The set_* paths take no cgroup locks inside the read side, so a pending write-lock then only waits for read sections that always run to completion, and no dependency from the rwsem back to cgroup_mutex remains.

CVSS v3
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

August 22, 2026

Last Modified

August 23, 2026

References (3)

Vendor Advisories for CVE-2026-74593(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 13× in last 7d / 16× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 08:23 UTCGHSA enrichment
  3. 2026-08-28 21:42 UTCEPSS rescore
  4. 2026-08-27 14:25 UTCEPSS rescore
  5. 2026-08-26 14:47 UTCEPSS rescore
  6. 2026-08-26 10:51 UTCEG score recompute
  7. 2026-08-26 10:50 UTCGHSA enrichment
  8. 2026-08-25 13:49 UTCEPSS rescore
  9. 2026-08-24 14:18 UTCEPSS rescore
  10. 2026-08-23 13:19 UTCGHSA enrichment
  11. 2026-08-23 13:19 UTCNVD update
  12. 2026-08-23 13:06 UTCGHSA enrichment
  13. 2026-08-23 13:05 UTCMITRE cvelistV5
  14. 2026-08-22 16:24 UTCNVD update
  15. 2026-08-22 15:42 UTCEG score recompute
  16. 2026-08-22 15:35 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-74593?
CVE-2026-74593 is a publicly disclosed vulnerability published on August 22, 2026. In the Linux kernel, the following vulnerability has been resolved: schedext: Take cgrouplock() first in scxcgrouplock() scxcgrouplock() write-locks scxcgroupops_rwsem and then takes cgroup_lock(), which can deadlock through kernfs: scx enable/disable cgroup rmdir cpu.weight write…
When was CVE-2026-74593 disclosed?
CVE-2026-74593 was first published in the National Vulnerability Database on August 22, 2026, with the most recent update on August 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74593 actively exploited?
CVE-2026-74593 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 93.9% of all scored CVEs.
How do I remediate CVE-2026-74593?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74593, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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