CVE-2026-74515

HIGHPre-NVD 8.88.8
EchelonGraph scoreMEDIUM confidence

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

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-15. A secondary CVSS source baseline 8.8; 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
8.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

KVM: s390: pci: Reject adapter interrupt forwarding if already enabled

The MPCIFC instruction doesn't allow registering adapter interrupts without first unregistering. So reject any request to enable interrupt forwarding if its already enabled for the zPCI device. This also fixes overwriting and thus leaking resources when the ioctl is called multiple times for the same device.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100

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)
Severity88% × 45%
Impact severity (EG Severity): CVSS 8.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (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.
EPSS PROB
0.1%
EPSS %ILE
2nd
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 (8.8): severity, escalated by confirmed exploitation. This CVE's 8.8 is its impact severity (EG Severity), not escalated.

EG Severity
8.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade 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; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (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 15, 2026

Last Modified

October 16, 2026

Advisory Details (5)

Auto-updated Aug 17, 2026
Patch available.
Web page

KVM: s390: pci: Reject adapter interrupt forwarding if already enabled - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8fa01be5a6149404adb82c0979a78f6347edd3ef
Web page

KVM: s390: pci: Reject adapter interrupt forwarding if already enabled - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/78d9648e7e960546d5b72504a0b0358cd8bb1e9d
Web page

KVM: s390: pci: Reject adapter interrupt forwarding if already enabled - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6be1ff49ba81f96a6fa55915e6d920be43ac57cc
Web page

KVM: s390: pci: Reject adapter interrupt forwarding if already enabled - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6837f0ae85fd54cf64c8a0c7c530bba2fae0a207
Web page

KVM: s390: pci: Reject adapter interrupt forwarding if already enabled - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/591952b63a9f976da7d49f719f36ec826ee2a575

Vendor Advisories for CVE-2026-74515(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1036.39) @ noble2026-10-16ubuntu

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

(4 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (56 versions)
  • every version up to 6.1.187-1: fixed in 6.1.187-1
—
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1
  • every version up to 6.12.107-1~deb12u1: fixed in 6.12.107-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (33 versions)
  • every version up to 6.12.105-1: fixed in 6.12.105-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (165 versions)
  • every version up to 7.1.8-1: fixed in 7.1.8-1
—

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 13× in last 7d / 77× 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 100 of 213 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. None are among the latest 100 rows. The 113 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  3. 2026-10-18 03:14 UTCEG score recompute
  4. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-10-16 20:28 UTCEG score recompute
  6. 2026-10-16 20:28 UTCVendor advisory
  7. 2026-10-16 20:28 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  8. 2026-10-16 19:29 UTCEG score recompute
  9. 2026-10-16 19:29 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  10. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-10-13 07:35 UTCEG score recompute
  15. 2026-10-13 07:35 UTCVendor advisory
  16. 2026-10-13 07:35 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  17. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  18. 2026-10-12 15:39 UTCEG score recompute
  19. 2026-10-11 19:25 UTCEG score recompute
  20. 2026-10-11 16:41 UTCEG score recompute
  21. 2026-10-11 14:00 UTCEG score recompute
  22. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  23. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  24. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  25. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 6th percentile
Show 75 more
  1. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-10-06 22:21 UTCEG score recompute
  3. 2026-10-06 22:21 UTCVendor advisory
  4. 2026-10-06 22:21 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  5. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  6. 2026-10-06 09:09 UTCEG score recompute
  7. 2026-10-06 09:09 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  8. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  9. 2026-10-05 12:04 UTCEG score recompute
  10. 2026-10-05 12:03 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  12. 2026-10-04 21:55 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  13. 2026-10-04 08:28 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  14. 2026-10-03 19:29 UTCEG score recompute
  15. 2026-10-03 19:29 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  16. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  17. 2026-10-02 15:50 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  18. 2026-10-02 01:59 UTCEG score recompute
  19. 2026-10-02 01:59 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  20. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  21. 2026-10-01 09:55 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  22. 2026-09-30 20:56 UTCEG score recompute
  23. 2026-09-30 20:56 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  24. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  25. 2026-09-29 00:33 UTCEG score recompute
  26. 2026-09-29 00:33 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  27. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  28. 2026-09-28 11:34 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  29. 2026-09-27 22:35 UTCEG score recompute
  30. 2026-09-27 22:35 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  31. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  32. 2026-09-27 08:24 UTCEG score recompute
  33. 2026-09-27 08:24 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  34. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  35. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  36. 2026-09-25 02:27 UTCEG score recompute
  37. 2026-09-25 02:27 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  38. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  39. 2026-09-24 05:10 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  40. 2026-09-23 16:09 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  41. 2026-09-23 03:00 UTCEG score recompute
  42. 2026-09-23 03:00 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  43. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  44. 2026-09-22 14:00 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  45. 2026-09-22 00:58 UTCEG score recompute
  46. 2026-09-22 00:58 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  47. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  48. 2026-09-21 11:59 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  49. 2026-09-20 22:50 UTCEG score recompute
  50. 2026-09-20 22:50 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  51. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  52. 2026-09-20 09:51 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  53. 2026-09-19 17:13 UTCEG score recompute
  54. 2026-09-19 17:13 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  55. 2026-09-19 04:13 UTCEG score recompute
  56. 2026-09-19 04:13 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  57. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  58. 2026-09-18 15:13 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  59. 2026-09-18 02:14 UTCEG score recompute
  60. 2026-09-18 02:14 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  61. 2026-09-17 13:15 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  62. 2026-09-16 23:25 UTCEG score recompute
  63. 2026-09-16 23:25 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  64. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  65. 2026-09-16 05:22 UTCEG score recompute
  66. 2026-09-16 05:22 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  67. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  68. 2026-09-15 16:22 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  69. 2026-09-15 03:23 UTCEG score recompute
  70. 2026-09-15 03:23 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  71. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  72. 2026-09-14 14:23 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  73. 2026-09-14 01:24 UTCEG score recompute
  74. 2026-09-14 01:24 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8
  75. 2026-09-13 12:25 UTCGHSA enrichmentGHSA-269x-pqmw-g2f4 · GitHub severity HIGH · GitHub CVSS 8.8

Frequently asked(5)

What is CVE-2026-74515?
CVE-2026-74515 is a high-severity vulnerability; its CVE record was published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Reject adapter interrupt forwarding if already enabled The MPCIFC instruction doesn't allow registering adapter interrupts without first unregistering. So reject any request to enable interrupt forwarding if its…
When was the CVE record for CVE-2026-74515 published?
The CVE record for CVE-2026-74515 was published on August 15, 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 16, 2026; the record at its source may have been updated since.
Is CVE-2026-74515 actively exploited?
CVE-2026-74515 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-74515?
CVE-2026-74515 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-74515?
A fix for CVE-2026-74515 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-74515 are linked in the Vendor Advisories panel on this page.

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