CVE-2026-46189

HIGHNVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-28. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
7.8EG
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: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path

Sashiko points out that pvrdma_uar_free() is already called within pvrdma_dealloc_ucontext(), so calling it before triggers a double free.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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 (value × EchelonGraph’s weight)
Severity78% × 45%
The EG Score, 7.8 of 10.
Exploitation0.1% × 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
0.1%
EPSS %ILE
3rd
KEV
Not listed

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

September 9, 2026

Advisory Details (8)

Auto-updated Jun 11, 2026
Patch available.
Web page

RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ecc36a82ecfcfdf3c6606d209f22ec5543c410e0
Web page

RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e38e86995df27f1f854063dab1f0c6a513db3faf
Web page

RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/935ee27d0904aa944cbcc979094c20e5ef62eead
Web page

RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/45d25e3ec17900bf5a9d6876ff16ceee31c4c0e0
Web page

RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3a231c34c5bc3d3cfc850b877758ec9fdaa8a483
Web page

RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/269967d7693304e1f06ed2dff4ebbbeeb397cda4
Web page

RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1df5711121cdc11e76b889408fdbe459feba1d39
Web page

RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0c63333ff97bd1275294fd12840a0efe9d7a4c59

Patch Availability(31)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-09-14ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-09-14ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-09-14ubuntu
ubuntulinux-tools-ibm-edge (5.15.0.1106.110~20.04.1) @ focal2026-09-14ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-09-14ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-09-14ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-09-14ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-09-14ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-09-14ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-09-14ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-09-14ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-09-14ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-09-14ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-09-14ubuntu
ubuntulinux-tools-aws-edge (6.8.0-1061.64~22.04.1) @ jammy2026-09-14ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-09-14ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-09-14ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-09-14ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-09-14ubuntu
redhatkernel-0:4.18.0-305.199.1.el8_42026-07-30redhat
redhatkernel-0:4.18.0-477.152.1.el8_82026-07-16redhat
redhatkernel-0:4.18.0-372.201.1.el8_62026-07-15redhat
redhatkernel-0:5.14.0-570.127.1.el9_62026-07-13redhat
redhatkernel-0:5.14.0-427.136.1.el9_42026-07-08redhat
redhatkernel-rt-0:4.18.0-553.139.1.rt7.480.el8_102026-07-07redhat
redhatkernel-0:5.14.0-284.179.1.el9_22026-07-07redhat
redhatkernel-rt-0:5.14.0-284.179.1.rt14.464.el9_22026-07-06redhat
redhatkernel-0:4.18.0-553.139.1.el8_102026-06-30redhat
redhatkernel-0:6.12.0-211.29.1.el10_22026-06-30redhat
redhatkernel-0:5.14.0-687.19.1.el9_82026-06-29redhat
linuxKernel @ 5.10.258 (fixes >=4.10.0)—osv

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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (54 versions)
  • every version up to 5.10.259-1: fixed in 5.10.259-1
—
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)
  • every version up to 6.1.176-1~deb11u1: fixed in 6.1.176-1~deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)
  • every version up to 6.1.176-1: fixed in 6.1.176-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.88-1~bpo12+1 (21 versions)
  • every version up to 6.12.88-1: fixed in 6.12.88-1
—
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(3)

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

Additional Vendor Advisories

(13)

Data Freshness Timeline

(refreshed 11× in last 7d / 28× 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 329 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 229 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-10-12 16:03 UTCEG score recompute
  5. 2026-10-11 19:45 UTCEG score recompute
  6. 2026-10-11 17:00 UTCEG score recompute
  7. 2026-10-11 14:25 UTCEG score recompute
  8. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  13. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  14. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  16. 2026-10-03 15:49 UTCOSV refresh
  17. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  20. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  21. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  23. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  24. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  25. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 4th percentile
Show 75 more
  1. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  2. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  3. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-09-14 07:05 UTCEG score recompute
  5. 2026-09-14 07:05 UTCVendor advisory
  6. 2026-09-14 07:04 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  7. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  8. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  10. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-09-09 13:41 UTCVendor advisory
  12. 2026-09-09 13:40 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  13. 2026-09-09 12:39 UTCEG score recompute
  14. 2026-09-09 12:39 UTCVendor advisory
  15. 2026-09-09 12:38 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  16. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  17. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  18. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  19. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  20. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  22. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  24. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  25. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  26. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  27. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  28. 2026-08-25 04:50 UTCEG score recompute
  29. 2026-08-25 04:50 UTCVendor advisory
  30. 2026-08-25 04:50 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  31. 2026-08-23 14:40 UTCEG score recompute
  32. 2026-08-23 14:40 UTCVendor advisory
  33. 2026-08-23 14:40 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  34. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  35. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  36. 2026-08-21 15:33 UTCEG score recompute
  37. 2026-08-21 15:33 UTCVendor advisory
  38. 2026-08-21 15:32 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  39. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  40. 2026-08-20 21:52 UTCVendor advisory
  41. 2026-08-20 21:51 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  42. 2026-08-20 10:54 UTCEG score recompute
  43. 2026-08-20 10:54 UTCVendor advisory
  44. 2026-08-20 10:54 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  45. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  46. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  47. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  48. 2026-08-17 08:52 UTCVendor advisory
  49. 2026-08-17 08:52 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  50. 2026-08-16 15:11 UTCEG score recompute
  51. 2026-08-16 15:11 UTCVendor advisory
  52. 2026-08-16 15:11 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  53. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  54. 2026-08-16 02:36 UTCEG score recompute
  55. 2026-08-16 02:36 UTCVendor advisory
  56. 2026-08-16 02:36 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  57. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  58. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  59. 2026-08-14 23:00 UTCVendor advisory
  60. 2026-08-14 23:00 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  61. 2026-08-14 12:03 UTCVendor advisory
  62. 2026-08-14 12:03 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  63. 2026-08-14 01:07 UTCEG score recompute
  64. 2026-08-14 01:07 UTCVendor advisory
  65. 2026-08-14 01:07 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  66. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  67. 2026-08-13 09:18 UTCVendor advisory
  68. 2026-08-13 09:18 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  69. 2026-08-12 22:22 UTCEG score recompute
  70. 2026-08-12 22:22 UTCVendor advisory
  71. 2026-08-12 22:22 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  72. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  73. 2026-08-12 11:25 UTCVendor advisory
  74. 2026-08-12 11:25 UTCGHSA enrichmentGHSA-xxxv-9j5g-vqfc · GitHub severity HIGH · GitHub CVSS 7.8
  75. 2026-08-12 00:27 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-46189?
CVE-2026-46189 is a high-severity vulnerability; its CVE record was published on May 28, 2026. In the Linux kernel, the following vulnerability has been resolved: RDMA/vmwpvrdma: Fix double free on pvrdmaalloc_ucontext() error path Sashiko points out that pvrdmauarfree() is already called within pvrdmadeallocucontext(), so calling it before triggers a double free.
When was the CVE record for CVE-2026-46189 published?
The CVE record for CVE-2026-46189 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 September 9, 2026; the record at its source may have been updated since.
Is CVE-2026-46189 actively exploited?
CVE-2026-46189 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-46189?
CVE-2026-46189 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-46189?
A fix for CVE-2026-46189 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-46189 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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