CVE-2026-46043

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-27. the CNA's CVSS baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: None knownExposed: 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)
EG Risk
46(Track)
EG Risk 46/100SSVC: 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
Severity91% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

May 27, 2026

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Aug 29, 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/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/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/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/2fd4f8b749309a61c3f3f88ee8891d94f79e1240
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/2c0d71ef12f46c57d37bc571f3f2797db7eb50cc
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/5fedefec757192dcaad29a664ac332c7601be144
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/c4376c672c3648d5bdc31dfffc329d07164f93c4

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(30)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-raspi-6.8 (6.8.0-1060.64) @ noble2026-08-25ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1079 (5.4.0-1079.83) @ focal2026-08-25ubuntu
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.253.237) @ bionic2026-08-25ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-27.27) @ resolute2026-08-25ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.17.0-40.40) @ questing2026-08-25ubuntu
ubuntulinux-tools-oem-6.17 (6.17.0-1028.28) @ noble2026-08-25ubuntu
ubuntulinux-virtual-6.8 (6.8.0-134.134) @ noble2026-08-25ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.185.166) @ jammy2026-08-25ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-08-25ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1058.61.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ resolute2026-08-25ubuntu
ubuntulinux-tools-realtime-hwe-24.04-edge (6.17.0-1017.19) @ questing2026-08-25ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-25ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1032.33) @ noble2026-08-25ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1108.114~20.04.1) @ focal2026-08-25ubuntu
ubuntulinux-tools-nvidia-hwe-24.04 (6.17.0-1026.26) @ noble2026-08-25ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2049.50) @ noble2026-08-25ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1105.103) @ jammy2026-08-25ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1074 (5.15.0-1074.78) @ jammy2026-08-25ubuntu
ubuntulinux-tools-aws-lts-18.04 (4.15.0.1194.192) @ bionic2026-08-25ubuntu
ubuntulinux-virtual-hwe-24.04 (6.17.0-40.40~24.04.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-raspi-6.17 (6.17.0-1021.21) @ questing2026-08-25ubuntu
ubuntulinux-tools-azure (4.15.0.1205.220~14.04.1) @ trusty2026-08-25ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1008.8) @ resolute2026-08-25ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1106.112~20.04.1) @ focal2026-08-25ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-134.134+fips1) @ noble2026-08-25ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-134.134.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1029.30) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-25ubuntu

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 ... 5.10.92-2 (54 versions)5.10.259-1—
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 ... 6.12.86-1~bpo12+1 (19 versions)6.12.86-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.4-1~bpo13+1 (131 versions)7.0.4-1—

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 5× in last 7d / 158× 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 479 total refreshes for this CVE.

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

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 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-2026-46043 actively exploited?
CVE-2026-46043 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 58.1% of all scored CVEs.
What is the CVSS score of CVE-2026-46043?
CVE-2026-46043 has a CVSS v4.0 base score of 9.1 (CNA self-assessment; NVD's own analysis pending).
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.

Dependency Blast Radius

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