CVE-2026-68385

CRITICALPre-NVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

s390/checksum: Fix csum_partial() without vector facility

Currently csum_partial() calls csum_copy() with copy=false and dst=NULL. On machines without the vector facility, csum_copy() falls back to cksm(dst, ...), causing the checksum to be calculated from address zero instead of the source buffer.

The VX implementation already checksums data loaded from src. Make the fallback do the same by passing src to cksm().

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
40th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-19). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 10, 2026

Last Modified

October 19, 2026

Advisory Details (4)

Auto-updated Oct 19, 2026
Patch available.
Web page

s390/checksum: Fix csum_partial() without vector facility - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/898bb2814f38399108bdd2113f38d97383a7036a
Web page

s390/checksum: Fix csum_partial() without vector facility - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5fc0a2a6eeb99cac991242bb48796c7749ce3261
Web page

s390/checksum: Fix csum_partial() without vector facility - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4bb06b60d982355e22647b3d12d6619419f8c1fa
Web page

s390/checksum: Fix csum_partial() without vector facility - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1d9a2f01b3c4e5c88e06b2db4b5460c2ec884722

Vendor Advisories for CVE-2026-68385(1)

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

Patch Availability(6)

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux-6.126.12.100-1~deb12u1
  • every version up to 6.12.101-1~deb12u1: fixed in 6.12.101-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (32 versions)
  • every version up to 6.12.101-1: fixed in 6.12.101-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (161 versions)
  • every version up to 7.1.6-1: fixed in 7.1.6-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(6)

Data Freshness Timeline

(refreshed 34× in last 7d / 123× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 386 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 287 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 22:27 UTCEG score recompute
  2. 2026-10-19 22:27 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-10-19 21:24 UTCEG score recompute
  4. 2026-10-19 21:24 UTCVendor advisory
  5. 2026-10-19 21:24 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-10-19 17:58 UTCEG score recompute
  7. 2026-10-19 17:58 UTCVendor advisory
  8. 2026-10-19 17:58 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  10. 2026-10-18 17:34 UTCEG score recompute
  11. 2026-10-18 17:34 UTCVendor advisory
  12. 2026-10-18 17:34 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  13. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  14. 2026-10-18 03:19 UTCEG score recompute
  15. 2026-10-17 17:11 UTCEG score recompute
  16. 2026-10-17 17:10 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  18. 2026-10-16 16:48 UTCEG score recompute
  19. 2026-10-16 16:48 UTCVendor advisory
  20. 2026-10-16 16:48 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  22. 2026-10-16 16:04 UTCEG score recompute
  23. 2026-10-16 16:04 UTCVendor advisory
  24. 2026-10-16 16:04 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  25. 2026-10-16 15:01 UTCEG score recompute
Show 74 more
  1. 2026-10-16 15:01 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  2. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-10-15 14:38 UTCEG score recompute
  4. 2026-10-15 14:38 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  6. 2026-10-14 09:14 UTCEG score recompute
  7. 2026-10-14 09:14 UTCVendor advisory
  8. 2026-10-14 09:13 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  10. 2026-10-13 06:20 UTCEG score recompute
  11. 2026-10-13 06:19 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  13. 2026-10-12 15:45 UTCEG score recompute
  14. 2026-10-12 05:58 UTCVendor advisory
  15. 2026-10-12 05:58 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  16. 2026-10-11 19:30 UTCEG score recompute
  17. 2026-10-11 16:45 UTCEG score recompute
  18. 2026-10-11 14:06 UTCEG score recompute
  19. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  20. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  21. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  22. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  23. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  24. 2026-10-07 03:16 UTCVendor advisory
  25. 2026-10-07 03:16 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  26. 2026-10-06 23:07 UTCVendor advisory
  27. 2026-10-06 23:06 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  28. 2026-10-06 18:26 UTCEG score recompute
  29. 2026-10-06 18:26 UTCVendor advisory
  30. 2026-10-06 18:26 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  31. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  32. 2026-10-05 18:27 UTCEG score recompute
  33. 2026-10-05 18:27 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  34. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  35. 2026-10-05 07:49 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  36. 2026-10-04 22:50 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  37. 2026-10-04 13:24 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  38. 2026-10-04 09:20 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  39. 2026-10-04 05:21 UTCEG score recompute
  40. 2026-10-04 05:21 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  41. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  42. 2026-10-03 00:53 UTCEG score recompute
  43. 2026-10-03 00:53 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  44. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  45. 2026-10-02 16:19 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  46. 2026-10-02 09:20 UTCEG score recompute
  47. 2026-10-02 09:20 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  48. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  49. 2026-10-01 14:51 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  50. 2026-10-01 10:53 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  51. 2026-10-01 06:34 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  52. 2026-10-01 02:36 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  53. 2026-09-30 22:37 UTCEG score recompute
  54. 2026-09-30 22:37 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  55. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  56. 2026-09-29 05:23 UTCEG score recompute
  57. 2026-09-29 05:23 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  58. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  59. 2026-09-28 10:21 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  60. 2026-09-28 06:23 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  61. 2026-09-28 02:24 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  62. 2026-09-27 16:57 UTCEG score recompute
  63. 2026-09-27 16:57 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  64. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  65. 2026-09-27 12:58 UTCEG score recompute
  66. 2026-09-27 12:58 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  67. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  68. 2026-09-25 12:10 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  69. 2026-09-25 08:01 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  70. 2026-09-25 04:03 UTCEG score recompute
  71. 2026-09-25 04:03 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  72. 2026-09-24 13:35 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  73. 2026-09-24 09:34 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8
  74. 2026-09-24 05:26 UTCGHSA enrichmentGHSA-p69g-gmqr-g4rm · GitHub severity CRITICAL · GitHub CVSS 9.8

Frequently asked(5)

What is CVE-2026-68385?
CVE-2026-68385 is a critical-severity vulnerability; its CVE record was published on August 10, 2026. In the Linux kernel, the following vulnerability has been resolved: s390/checksum: Fix csum_partial() without vector facility Currently csumpartial() calls csumcopy() with copy=false and dst=NULL. On machines without the vector facility, csum_copy() falls back to cksm(dst, ...), causing the…
When was the CVE record for CVE-2026-68385 published?
The CVE record for CVE-2026-68385 was published on August 10, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 19, 2026; the record at its source may have been updated since.
Is CVE-2026-68385 actively exploited?
CVE-2026-68385 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (40th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-68385?
CVE-2026-68385 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-68385?
A fix for CVE-2026-68385 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-68385 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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