CVE-2026-53281

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-26. the CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 4 sources updated this week
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.

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

iommu/vt-d: Avoid NULL pointer dereference or refcount corruption

Commit 60f030f7418d ("iommu/vt-d: Avoid use of NULL after WARN_ON_ONCE") fixed a NULL pointer dereference in an unlikely situation partly.

If dev_pasid is not found in the dev_pasids list, it remains NULL. However, the teardown operations are executed unconditionally, this lead to a NULL pointer dereference or refcount corruption.

If the domain was never attached to this IOMMU, info will be NULL, which would cause an immediate dereference when checking --info->refcnt.

Even if info is not NULL, decrementing the refcount without having removed a valid PASID might unbalance the count. This could lead to premature dropping of the refcount to 0, potentially causing a use-after-free for the remaining active devices sharing the domain.

Fix it by returning early if dev_pasid is NULL, before executing the teardown operations.

Issue found by AI review and suggested by Kevin Tian. https://sashiko.dev/#/patchset/20260421031347.1408890-1-zhenzhong.duan%40intel.com

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
3%
KEV
Not listed

Published

June 26, 2026

Last Modified

August 5, 2026

Advisory Details (3)

Auto-updated Jun 28, 2026
No patch confirmed yet.
generic

iommu/vt-d: Avoid NULL pointer dereference or refcount corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cdfe3c9f2c9e28a8651ee463c88ad191ced2f840
generic

iommu/vt-d: Avoid NULL pointer dereference or refcount corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9022cb9ac0c2a72a57fa8ebf92ac74f953ca0153
generic

iommu/vt-d: Avoid NULL pointer dereference or refcount corruption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/79ea2feb917b05366b49d85573c9c5331f043b2c

Vendor Advisories for CVE-2026-53281(2)

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

Patch Availability(10)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16~24.04.1) @ noble2026-08-21ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-21ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-21ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-21ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-08-21ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-08-21ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-21ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-21ubuntu
redhatkernel-0:6.12.0-211.40.1.el10_22026-07-28redhat
redhatkernel-0:5.14.0-687.31.1.el9_82026-07-28redhat

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

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.2~rc5-1~exp1 (160 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (137 versions)7.0.10-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(9)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 35× in last 7d / 157× 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 230 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-53281?
CVE-2026-53281 is a high vulnerability published on June 26, 2026. In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Avoid NULL pointer dereference or refcount corruption Commit 60f030f7418d ("iommu/vt-d: Avoid use of NULL after WARNONONCE") fixed a NULL pointer dereference in an unlikely situation partly. If devpasid is not found in…
When was CVE-2026-53281 disclosed?
CVE-2026-53281 was first published in the National Vulnerability Database on June 26, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53281 actively exploited?
CVE-2026-53281 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 96.9% of all scored CVEs.
What is the CVSS score of CVE-2026-53281?
CVE-2026-53281 has a CVSS v4.0 base score of 8.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-53281?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53281, 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

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