CVE-2026-46182

MEDIUMCVSS · not yet scored5.5
EchelonGraph scoreLOW confidence

Score 5.5 from GitHub Security Advisory published 2026-05-28.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory
5.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS v2: —Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

pseries/papr-hvpipe: Prevent kernel stack memory leak to userspace

The hdr variable is allocated on the stack and only hdr.version and hdr.flags are initialized explicitly. Because the struct papr_hvpipe_hdr contains reserved padding bytes (reserved[3] and reserved2[40]), these could leak the uninitialized bytes to userspace after copy_to_user().

This patch fixes that by initializing the whole struct to 0.

CVSS v3
—
EG Score
5.5MEDIUMlow confidence
EG Risk
25
EG Risk 25/100

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)
Severity55% × 45%
Impact severity (EG Severity): CVSS 5.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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
0.2%
EPSS %ILE
4th
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 (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity
5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% 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 (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” 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

May 28, 2026

Last Modified

June 14, 2026

Vendor Advisories for CVE-2026-46182(1)

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

Patch Availability(10)

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

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.0.7-1~bpo13+1 (137 versions)
  • every version up to 7.0.7-1: fixed in 7.0.7-1
—

Weakness Classification(1)

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

All Vendor Advisories

(9)

Data Freshness Timeline

(refreshed 8× in last 7d / 30× 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 237 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 137 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  2. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  3. 2026-10-18 03:37 UTCEG score recompute
  4. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  5. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  6. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  7. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  8. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  9. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  10. 2026-10-12 16:03 UTCEG score recompute
  11. 2026-10-11 19:45 UTCEG score recompute
  12. 2026-10-11 17:00 UTCEG score recompute
  13. 2026-10-11 14:25 UTCEG score recompute
  14. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  15. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  16. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  17. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  18. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  19. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  20. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  21. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  22. 2026-10-03 15:49 UTCOSV refresh
  23. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  24. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  25. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 4th percentile
Show 75 more
  1. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  2. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  3. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  4. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  7. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-09-14 07:05 UTCEG score recompute
  11. 2026-09-14 07:05 UTCVendor advisory
  12. 2026-09-14 07:05 UTCGHSA enrichmentGHSA-2vh6-g7pq-9fgv · GitHub CVSS 5.5
  13. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-09-13 02:39 UTCOSV refresh
  15. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  20. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  22. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  26. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  27. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  28. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  29. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  30. 2026-08-25 04:51 UTCEG score recompute
  31. 2026-08-25 04:51 UTCVendor advisory
  32. 2026-08-25 04:50 UTCGHSA enrichmentGHSA-2vh6-g7pq-9fgv · GitHub CVSS 5.5
  33. 2026-08-23 14:40 UTCEG score recompute
  34. 2026-08-23 14:40 UTCVendor advisory
  35. 2026-08-23 14:40 UTCGHSA enrichmentGHSA-2vh6-g7pq-9fgv · GitHub CVSS 5.5
  36. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  37. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  38. 2026-08-21 15:33 UTCEG score recompute
  39. 2026-08-21 15:33 UTCVendor advisory
  40. 2026-08-21 15:33 UTCGHSA enrichmentGHSA-2vh6-g7pq-9fgv · GitHub CVSS 5.5
  41. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  42. 2026-08-20 10:55 UTCEG score recompute
  43. 2026-08-20 10:55 UTCVendor advisory
  44. 2026-08-20 10:55 UTCGHSA enrichmentGHSA-2vh6-g7pq-9fgv · GitHub CVSS 5.5
  45. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  46. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  47. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  48. 2026-08-17 08:54 UTCEG score recompute
  49. 2026-08-17 08:54 UTCVendor advisory
  50. 2026-08-17 08:54 UTCGHSA enrichmentGHSA-2vh6-g7pq-9fgv · GitHub CVSS 5.5
  51. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  52. 2026-08-16 02:36 UTCEG score recompute
  53. 2026-08-16 02:36 UTCVendor advisory
  54. 2026-08-16 02:36 UTCGHSA enrichmentGHSA-2vh6-g7pq-9fgv · GitHub CVSS 5.5
  55. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  56. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  57. 2026-08-14 04:14 UTCEG score recompute
  58. 2026-08-14 04:14 UTCVendor advisory
  59. 2026-08-14 04:14 UTCGHSA enrichmentGHSA-2vh6-g7pq-9fgv · GitHub CVSS 5.5
  60. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  61. 2026-08-13 03:48 UTCEG score recompute
  62. 2026-08-13 03:48 UTCVendor advisory
  63. 2026-08-13 03:48 UTCGHSA enrichmentGHSA-2vh6-g7pq-9fgv · GitHub CVSS 5.5
  64. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  65. 2026-08-12 03:21 UTCEG score recompute
  66. 2026-08-12 03:21 UTCVendor advisory
  67. 2026-08-12 03:21 UTCGHSA enrichmentGHSA-2vh6-g7pq-9fgv · GitHub CVSS 5.5
  68. 2026-08-11 02:39 UTCEG score recompute
  69. 2026-08-11 02:39 UTCVendor advisory
  70. 2026-08-11 02:39 UTCGHSA enrichmentGHSA-2vh6-g7pq-9fgv · GitHub CVSS 5.5
  71. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  72. 2026-08-10 02:12 UTCEG score recompute
  73. 2026-08-10 02:12 UTCVendor advisory
  74. 2026-08-10 02:12 UTCGHSA enrichmentGHSA-2vh6-g7pq-9fgv · GitHub CVSS 5.5
  75. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.1% · 2nd percentile

Frequently asked(4)

What is CVE-2026-46182?
CVE-2026-46182 is a medium-severity vulnerability; its CVE record was published on May 28, 2026. In the Linux kernel, the following vulnerability has been resolved: pseries/papr-hvpipe: Prevent kernel stack memory leak to userspace The hdr variable is allocated on the stack and only hdr.version and hdr.flags are initialized explicitly. Because the struct paprhvpipehdr contains reserved padding…
When was the CVE record for CVE-2026-46182 published?
The CVE record for CVE-2026-46182 was published on May 28, 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 June 14, 2026; the record at its source may have been updated since.
Is CVE-2026-46182 actively exploited?
CVE-2026-46182 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (4th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-46182?
A fix for CVE-2026-46182 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-46182 are linked in the Vendor Advisories panel on this page.

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