CVE-2026-52989

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-24. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers

Currently, when nvmet_tcp_build_pdu_iovec() detects an out-of-bounds PDU length or offset, it triggers nvmet_tcp_fatal_error(cmd->queue) and returns early. However, because the function returns void, the callers are entirely unaware that a fatal error has occurred and that the cmd->recv_msg.msg_iter was left uninitialized.

Callers such as nvmet_tcp_handle_h2c_data_pdu() proceed to blindly overwrite the queue state with queue->rcv_state = NVMET_TCP_RECV_DATA Consequently, the socket receiving loop may attempt to read incoming network data into the uninitialized iterator.

Fix this by shifting the error handling responsibility to the callers.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

June 24, 2026

Last Modified

August 24, 2026

Advisory Details (9)

Auto-updated Sep 14, 2026
No patch confirmed yet.
generic

nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ea8e356acb165cb1fd75537a52e1f66e5e76c538
generic

nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/046fa5c72d15cd8e2d592e275697ea399d8f76b0
generic

nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c2a11441538bdbbc5aa003f190995eba93a89b88
generic

nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f9204a2b78dd18374d3bcf9bf93d9021ce22de1b
generic

nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d7c8f95f599b3b38a717d2e771c3f8c174f657c3
generic

nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3df42a854686fa06484e37ac1a3931c8e3e3453c
redhat

Affected: Red Hat Enterprise Linux 10",

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52989.json
redhat

2492443 – (CVE-2026-52989) CVE-2026-52989 kernel: nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers

https://bugzilla.redhat.com/show_bug.cgi?id=2492443
redhat Patch Available

CVE-2026-52989 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-52989

Vendor Advisories for CVE-2026-52989(2)

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

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1080 (5.4.0-1080.84) @ focal2026-09-18ubuntu
ubuntulinux-tools-nvidia-tegra-igx-rt-5.15 (5.15.0.1054.56) @ jammy2026-09-18ubuntu
ubuntulinux-tools-azure-fde-edge (5.15.0.1118.127~20.04.1) @ focal2026-09-18ubuntu
ubuntulinux-tools-oracle-64k-6.17 (6.17.0-1020.20) @ noble2026-09-18ubuntu
ubuntulinux-tools-gcp-lts-22.04 (5.15.0.1114.111) @ jammy2026-09-18ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-24.04 (6.17.0-1031.31) @ noble2026-09-18ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (5.15.0.190.157) @ jammy2026-09-18ubuntu
ubuntulinux-tools-azure-fips-5.4 (5.4.0.1167.103) @ focal2026-09-18ubuntu
ubuntulinux-tools-gke-5.15 (5.15.0.1110.109) @ jammy2026-09-18ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1114.124~20.04.1) @ focal2026-09-18ubuntu
ubuntulinux-tools-oracle-edge (5.4.0.1161.171~18.04.1) @ bionic2026-09-18ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-kvm-5.4 (5.4.0.1149.145) @ focal2026-09-18ubuntu
ubuntulinux-tools-gcp-fips-5.4 (5.4.0.1165.107) @ focal2026-09-18ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-09-18ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-09-18ubuntu
ubuntulinux-tools-realtime-hwe-22.04 (6.8.1-1056.57~22.04.2) @ jammy2026-09-18ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-09-18ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-09-18ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-09-18ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-09-18ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-09-18ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-09-18ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-09-18ubuntu

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 rangeFixed inDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)——
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)6.1.176-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)6.1.176-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (140 versions)7.0.10-1—

Weakness Classification(2)

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

Additional Vendor Advisories

(24)

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 19× in last 7d / 100× 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 542 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-52989?
CVE-2026-52989 is a critical vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: propagate nvmettcpbuildpduiovec() errors to its callers Currently, when nvmettcpbuildpduiovec() detects an out-of-bounds PDU length or offset, it triggers nvmettcpfatal_error(cmd->queue) and returns early. However,…
When was CVE-2026-52989 disclosed?
CVE-2026-52989 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on August 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52989 actively exploited?
CVE-2026-52989 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 70.6% of all scored CVEs.
What is the CVSS score of CVE-2026-52989?
CVE-2026-52989 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-52989?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52989, 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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