CVE-2026-46043

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-27. a secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.1Exploit: NoneExposed: 0

A fix is available — apply it.

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

RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv

rxe_rcv() currently checks only that the incoming packet is at least header_size(pkt) bytes long before payload_size() is used.

However, payload_size() subtracts both the attacker-controlled BTH pad field and RXE_ICRC_SIZE from pkt->paylen:

payload_size = pkt->paylen - offset[RXE_PAYLOAD] - bth_pad(pkt)

  • RXE_ICRC_SIZE

This means a short packet can still make payload_size() underflow even if it includes enough bytes for the fixed headers. Simply requiring header_size(pkt) + RXE_ICRC_SIZE is not sufficient either, because a packet with a forged non-zero BTH pad can still leave payload_size() negative and pass an underflowed value to later receive-path users.

Fix this by validating pkt->paylen against the full minimum length required by payload_size(): header_size(pkt) + bth_pad(pkt) + RXE_ICRC_SIZE.

CVSS v3
9.1
EG Score
9.1(medium)
EPSS
40.3%
KEV
Not listed

Published

May 27, 2026

Last Modified

June 16, 2026

Advisory Details (5)

Auto-updated May 31, 2026
No patch confirmed yet.
generic

RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f83519a4c122c9c7a850a2197648a9ff4c67c520
generic

RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e8ee0e792d475b1067c199ef0af1b6221fa6f43d
generic

RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9b924f3a26b21330a837cfe72e819b6393bbeeaa
generic

RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7244491dab347f648e661da96dc0febadd9daec3
generic

RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2fd4f8b749309a61c3f3f88ee8891d94f79e1240

Vendor Advisories for CVE-2026-46043(2)

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

Patch Availability(22)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-27.27) @ resolute2026-07-11ubuntu
ubuntulinux-tools-raspi-6.17 (6.17.0-1021.21) @ questing2026-07-11ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1060.64) @ noble2026-07-11ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-134.134+fips1) @ noble2026-07-11ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1105.103) @ jammy2026-07-11ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1074 (5.15.0-1074.78) @ jammy2026-07-11ubuntu
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.253.237) @ bionic2026-07-11ubuntu
ubuntulinux-tools-aws-lts-18.04 (4.15.0.1194.192) @ bionic2026-07-11ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1008.8) @ resolute2026-07-11ubuntu
ubuntulinux-tools-oem-6.17 (6.17.0-1028.28) @ noble2026-07-11ubuntu
ubuntulinux-virtual-6.8 (6.8.0-134.134) @ noble2026-07-11ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.17.0-40.40) @ questing2026-07-11ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.185.166) @ jammy2026-07-11ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ resolute2026-07-11ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1058.61.1) @ noble2026-07-11ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-134.134.1) @ noble2026-07-11ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1029.30) @ noble2026-07-11ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1032.33) @ noble2026-07-11ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1108.114~20.04.1) @ focal2026-07-11ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-07-11ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2049.50) @ noble2026-07-11ubuntu
ubuntulinux-tools-nvidia-hwe-24.04 (6.17.0-1026.26) @ noble2026-07-11ubuntu

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.

Additional Vendor Advisories

(22)

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 10× in last 7d / 136× 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 372 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-46043?
CVE-2026-46043 is a critical vulnerability published on May 27, 2026. In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Validate pad and ICRC before payloadsize() in rxercv rxe_rcv() currently checks only that the incoming packet is at least headersize(pkt) bytes long before payloadsize() is used. However, payload_size() subtracts both the…
When was CVE-2026-46043 disclosed?
CVE-2026-46043 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46043 actively exploited?
CVE-2026-46043 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 40.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46043?
CVE-2026-46043 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-46043?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46043, 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.

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