CVE-2026-68154

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-10. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: 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:

libceph: reject zero bucket types in crush_decode

CRUSH bucket type 0 is reserved for devices. The mapper relies on that invariant and uses type 0 to identify leaf devices.

If crush_decode() accepts a bucket with type 0, a malformed CRUSH map can make the mapper treat a negative bucket ID as a device and pass it to is_out(), which then indexes the OSD weight array with a negative value.

Reject zero bucket types while decoding the CRUSH map so the invalid state never reaches the mapper.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
51%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 19, 2026

Advisory Details (5)

Auto-updated Aug 19, 2026
No patch confirmed yet.
generic

libceph: reject zero bucket types in crush_decode - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b8a9fb6bf806f9c4891e71ae1beab0c07c23a877
generic

libceph: reject zero bucket types in crush_decode - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/826cd1de5802fd392922785f9b64d76e65d2a100
generic

libceph: reject zero bucket types in crush_decode - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/70998f91030ee083ecb336a1dff0701c20a38081
generic

libceph: reject zero bucket types in crush_decode - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3b2f1937f5fce8b7dd5432e7693e3cc8b5eece56
generic

libceph: reject zero bucket types in crush_decode - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/05f90284223381005d6bcddab3fda4a97f9c3401

Vendor Advisories for CVE-2026-68154(2)

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 60× in last 7d / 74× 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. 2026-08-21 00:46 UTCEG score recompute
  2. 2026-08-21 00:45 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 20:53 UTCGHSA enrichment
  5. 2026-08-20 17:01 UTCGHSA enrichment
  6. 2026-08-20 13:09 UTCGHSA enrichment
  7. 2026-08-20 09:02 UTCGHSA enrichment
  8. 2026-08-20 05:10 UTCGHSA enrichment
  9. 2026-08-20 01:18 UTCGHSA enrichment
  10. 2026-08-19 21:26 UTCGHSA enrichment
  11. 2026-08-19 17:25 UTCEG score recompute
  12. 2026-08-19 17:25 UTCGHSA enrichment
  13. 2026-08-19 17:04 UTCEPSS rescore
  14. 2026-08-19 16:55 UTCEG score recompute
  15. 2026-08-19 16:55 UTCGHSA enrichment
  16. 2026-08-19 13:08 UTCGHSA enrichment
  17. 2026-08-19 09:16 UTCGHSA enrichment
  18. 2026-08-19 05:24 UTCGHSA enrichment
  19. 2026-08-19 01:32 UTCGHSA enrichment
  20. 2026-08-18 21:40 UTCGHSA enrichment
  21. 2026-08-18 17:25 UTCEG score recompute
  22. 2026-08-18 17:25 UTCGHSA enrichment
  23. 2026-08-18 13:48 UTCEPSS rescore
  24. 2026-08-18 12:46 UTCGHSA enrichment
  25. 2026-08-18 08:47 UTCGHSA enrichment
Show 49 more
  1. 2026-08-18 04:55 UTCGHSA enrichment
  2. 2026-08-18 01:02 UTCGHSA enrichment
  3. 2026-08-17 21:10 UTCGHSA enrichment
  4. 2026-08-17 17:18 UTCEG score recompute
  5. 2026-08-17 17:18 UTCGHSA enrichment
  6. 2026-08-17 13:47 UTCEPSS rescore
  7. 2026-08-17 13:25 UTCGHSA enrichment
  8. 2026-08-17 09:32 UTCGHSA enrichment
  9. 2026-08-17 05:40 UTCEG score recompute
  10. 2026-08-17 05:40 UTCGHSA enrichment
  11. 2026-08-17 05:11 UTCEG score recompute
  12. 2026-08-17 05:11 UTCGHSA enrichment
  13. 2026-08-17 01:25 UTCGHSA enrichment
  14. 2026-08-16 21:33 UTCGHSA enrichment
  15. 2026-08-16 17:41 UTCEG score recompute
  16. 2026-08-16 17:41 UTCGHSA enrichment
  17. 2026-08-16 14:56 UTCEPSS rescore
  18. 2026-08-16 13:49 UTCGHSA enrichment
  19. 2026-08-16 09:56 UTCGHSA enrichment
  20. 2026-08-16 06:04 UTCEG score recompute
  21. 2026-08-16 06:04 UTCGHSA enrichment
  22. 2026-08-16 02:12 UTCGHSA enrichment
  23. 2026-08-15 22:20 UTCGHSA enrichment
  24. 2026-08-15 18:28 UTCGHSA enrichment
  25. 2026-08-15 14:36 UTCGHSA enrichment
  26. 2026-08-15 10:44 UTCGHSA enrichment
  27. 2026-08-15 06:52 UTCGHSA enrichment
  28. 2026-08-15 02:34 UTCEG score recompute
  29. 2026-08-15 02:34 UTCGHSA enrichment
  30. 2026-08-15 01:30 UTCEPSS rescore
  31. 2026-08-14 22:42 UTCGHSA enrichment
  32. 2026-08-14 18:50 UTCGHSA enrichment
  33. 2026-08-14 14:58 UTCGHSA enrichment
  34. 2026-08-14 11:06 UTCGHSA enrichment
  35. 2026-08-14 07:14 UTCGHSA enrichment
  36. 2026-08-14 03:22 UTCEG score recompute
  37. 2026-08-14 03:22 UTCGHSA enrichment
  38. 2026-08-13 23:30 UTCEG score recompute
  39. 2026-08-13 23:30 UTCGHSA enrichment
  40. 2026-08-13 22:45 UTCEG score recompute▲ 9.80
  41. 2026-08-13 22:45 UTCGHSA enrichment
  42. 2026-08-13 22:44 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  43. 2026-08-13 22:00 UTCEPSS rescore
  44. 2026-08-13 20:11 UTCEG score recompute
  45. 2026-08-13 20:11 UTCGHSA enrichment
  46. 2026-08-12 13:51 UTCEPSS rescore
  47. 2026-08-10 13:24 UTCNVD update
  48. 2026-08-10 12:21 UTCEG score recompute
  49. 2026-08-10 12:17 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-68154?
CVE-2026-68154 is a critical vulnerability published on August 10, 2026. In the Linux kernel, the following vulnerability has been resolved: libceph: reject zero bucket types in crush_decode CRUSH bucket type 0 is reserved for devices. The mapper relies on that invariant and uses type 0 to identify leaf devices. If crush_decode() accepts a bucket with type 0, a…
When was CVE-2026-68154 disclosed?
CVE-2026-68154 was first published in the National Vulnerability Database on August 10, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-68154 actively exploited?
CVE-2026-68154 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 49.4% of all scored CVEs.
What is the CVSS score of CVE-2026-68154?
CVE-2026-68154 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-68154?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-68154, 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.

Dependency Blast Radius

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