CVE-2018-16882

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

A use-after-free issue was found in the way the Linux kernel's KVM hypervisor processed posted interrupts when nested(=1) virtualization is enabled. In nested_get_vmcs12_pages(), in case of an error while processing posted interrupt address, it unmaps the 'pi_desc_page' without resetting 'pi_desc' descriptor address, which is later used in pi_test_and_clear_on(). A guest user/process could use this flaw to crash the host kernel resulting in DoS or potentially gain privileged access to a system. Kernel versions before 4.14.91 and before 4.19.13 are vulnerable.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

January 3, 2019

Last Modified

November 21, 2024

Advisory Details (6)

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

myF5

https://support.f5.com/csp/article/K80557033
generic

'[PATCH] KVM: Fix UAF in nested posted interrupt processing' - MARC

https://marc.info/?l=kvm&m=154514994222809&w=2
generic

Linux 4.14.91 [LWN.net]

https://lwn.net/Articles/775721/
generic

Linux 4.19.13 [LWN.net]

https://lwn.net/Articles/775720/
redhat

1660604 – (CVE-2018-16882) CVE-2018-16882 Kernel: KVM: nVMX: use after free in posted interrupt processing

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16882
generic

CVE-2018-16882 - PSIRT.COM

http://www.securityfocus.com/bid/106254

Patch Availability(7)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-virtual-hwe-16.04-edge (4.15.0.44.46) @ bionic2026-05-27ubuntu
ubuntulinux-image-raspi2 (4.18.0.1009.6) @ cosmic2026-05-27ubuntu
ubuntulinux-image-virtual-hwe-16.04 (4.15.0.45.66) @ xenial2026-05-27ubuntu
ubuntulinux-image-virtual-hwe-18.04 (4.18.0.14.64) @ bionic2026-05-27ubuntu
ubuntulinux-image-azure (4.18.0.1008.9) @ cosmic2026-05-27ubuntu
ubuntulinux-image-azure (4.15.0.1037.42) @ xenial2026-05-27ubuntu
ubuntulinux-image-raspi2 (4.15.0.1031.29) @ bionic2026-05-27ubuntu

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 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux—4.19.13-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—4.19.13-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—4.19.13-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—4.19.13-1—

Weakness Classification(1)

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

All Vendor Advisories

(7)

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 7× in last 7d / 29× 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.

Showing the most recent 100 of 122 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2018-16882?
CVE-2018-16882 is a high vulnerability published on January 3, 2019. A use-after-free issue was found in the way the Linux kernel's KVM hypervisor processed posted interrupts when nested(=1) virtualization is enabled. In nestedgetvmcs12pages(), in case of an error while processing posted interrupt address, it unmaps the 'pidescpage' without resetting 'pidesc'…
When was CVE-2018-16882 disclosed?
CVE-2018-16882 was first published in the National Vulnerability Database on January 3, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-16882 actively exploited?
CVE-2018-16882 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 70.7% of all scored CVEs.
What is the CVSS score of CVE-2018-16882?
CVE-2018-16882 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2018-16882?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-16882, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-16882

Explore →

Is Your Infrastructure Affected by CVE-2018-16882?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs