CVE-2026-43156

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-05-06. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

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

net: usb: pegasus: enable basic endpoint checking

pegasus_probe() fills URBs with hardcoded endpoint pipes without verifying the endpoint descriptors:

  • usb_rcvbulkpipe(dev, 1) for RX data
  • usb_sndbulkpipe(dev, 2) for TX data
  • usb_rcvintpipe(dev, 3) for status interrupts

A malformed USB device can present these endpoints with transfer types that differ from what the driver assumes.

Add a pegasus_usb_ep enum for endpoint numbers, replacing magic constants throughout. Add usb_check_bulk_endpoints() and usb_check_int_endpoints() calls before any resource allocation to verify endpoint types before use, rejecting devices with mismatched descriptors at probe time, and avoid triggering assertion.

Similar fix to

  • commit 90b7f2961798 ("net: usb: rtl8150: enable basic endpoint checking")
  • commit 9e7021d2aeae ("net: usb: catc: enable basic endpoint checking")

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

May 6, 2026

Last Modified

May 13, 2026

Advisory Details (8)

Auto-updated Aug 2, 2026
No patch confirmed yet.
generic

net: usb: pegasus: enable basic endpoint checking - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d2e7c898cc02dfe42443489a67a45ed616cb76e9
generic

net: usb: pegasus: enable basic endpoint checking - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a3e64e950a3981a8199de9798f6d21261b959171
generic

net: usb: pegasus: enable basic endpoint checking - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/67ba6b13dbcaf45681fb6758794c5ac5fa589a6c
generic

net: usb: pegasus: enable basic endpoint checking - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3d7e6ce34f4fcc7083510c28b17a7c36462a25d4
generic

net: usb: pegasus: enable basic endpoint checking - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/35854ed5c40b02f95824e44398f9d2ba33727203
generic

net: usb: pegasus: enable basic endpoint checking - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2705709f6574a088aab246af72fc95f2fea51484
generic

net: usb: pegasus: enable basic endpoint checking - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/26b3ec62fa1a94ac801feca47f040fc729b3c174
generic

net: usb: pegasus: enable basic endpoint checking - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/229dc9b9db475ac900182bafe258943e0e054c6d

Patch Availability(25)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1029.30) @ noble2026-08-23ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1060.64) @ noble2026-08-23ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-134.134.1) @ noble2026-08-23ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-134.134+fips1) @ noble2026-08-23ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1032.33) @ noble2026-08-23ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2049.50) @ noble2026-08-23ubuntu
ubuntulinux-virtual-6.8 (6.8.0-134.134) @ noble2026-08-23ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1058.61.1) @ noble2026-08-23ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-08-23ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-tools-ibm-edge (5.15.0.1106.110~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1063.71~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-08-23ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-08-23ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-08-23ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-08-23ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-23ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-08-23ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-08-23ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-08-23ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1112.122~20.04.1) @ focal2026-08-23ubuntu
linuxKernel @ 5.10.252—osv

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 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (53 versions)5.10.257-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (48 versions)6.1.170-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)6.12.85-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (116 versions)6.19.6-1—

All Vendor Advisories

(24)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 30× 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 188 total refreshes for this CVE.

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

Related CVEs(same product + same vendor)

Frequently asked(5)

What is CVE-2026-43156?
CVE-2026-43156 is a medium vulnerability published on May 6, 2026. In the Linux kernel, the following vulnerability has been resolved: net: usb: pegasus: enable basic endpoint checking pegasus_probe() fills URBs with hardcoded endpoint pipes without verifying the endpoint descriptors: usb_rcvbulkpipe(dev, 1) for RX data usb_sndbulkpipe(dev, 2) for TX data…
When was CVE-2026-43156 disclosed?
CVE-2026-43156 was first published in the National Vulnerability Database on May 6, 2026, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43156 actively exploited?
CVE-2026-43156 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 97.7% of all scored CVEs.
What is the CVSS score of CVE-2026-43156?
CVE-2026-43156 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-43156?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43156, 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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