CVE-2026-89481

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-11. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

nvme-tcp: fix host memory disclosure on R2T for a read command

nvme_tcp_handle_r2t() does not check the direction of the request the R2T refers to. A malicious controller can send an R2T for a READ and the host will answer it: nvme_tcp_setup_h2c_data_pdu() builds the H2CData header and nvme_tcp_try_send_data() sends the request's data buffer. That buffer is the READ destination, so its contents go to the controller.

The command then completes normally and nothing is logged.

Against a test controller that answers every READ with an R2T, a 4096 byte buffered read returned all 4096 bytes, split over two R2Ts. The pages contained stale kernel data, including an array of struct page pointers.

Reject an R2T for a request that is not a write.

CVSS v3
7.5
EG Score
7.5HIGHhigh confidence
EG Risk
38
EG Risk 38/100CISA SSVC

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
Severity75% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
33rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 11, 2026

Last Modified

September 14, 2026

Advisory Details (4)

Auto-updated Sep 13, 2026
Patch available.
generic

nvme-tcp: fix host memory disclosure on R2T for a read command - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a4c3c7310156493797c920b10d8648c07aa05403
generic

nvme-tcp: fix host memory disclosure on R2T for a read command - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6efbc52237facda35d2d874fe1765bb4839275d8
generic

nvme-tcp: fix host memory disclosure on R2T for a read command - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3b3d27670c0c890ba7cf1bc3614cab61bde6d25c
generic

nvme-tcp: fix host memory disclosure on R2T for a read command - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3a0b05145053a5fad1a2ddb4e4d87b07385e63e5

Vendor Advisories for CVE-2026-89481(3)

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
redhatkernel-0:6.12.0-211.60.1.el10_22026-09-24redhat

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 ... 7.2~rc7-1~exp1 (360 versions)
  • every version on: no fix on record
—
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1, 6.12.107-1~deb12u1
  • every version up to 6.12.111-1~deb12u1: fixed in 6.12.111-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (35 versions)
  • every version up to 6.12.111-1: fixed in 6.12.111-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (179 versions)
  • every version up to 7.2.6-1: fixed in 7.2.6-1
—

Data Freshness Timeline

(refreshed 41× in last 7d / 139× 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 139 total refreshes for this CVE.

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

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2026-89481?
CVE-2026-89481 is a high vulnerability published on September 11, 2026. In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix host memory disclosure on R2T for a read command nvmetcphandle_r2t() does not check the direction of the request the R2T refers to. A malicious controller can send an R2T for a READ and the host will answer it:…
When was CVE-2026-89481 disclosed?
CVE-2026-89481 was first published on September 11, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-89481 actively exploited?
CVE-2026-89481 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (33rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-89481?
CVE-2026-89481 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-89481?
A fix for CVE-2026-89481 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-89481 are linked in the Vendor Advisories panel on this page.

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