CVE-2026-31405

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-06. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

media: dvb-net: fix OOB access in ULE extension header tables

The ule_mandatory_ext_handlers[] and ule_optional_ext_handlers[] tables in handle_one_ule_extension() are declared with 255 elements (valid indices 0-254), but the index htype is derived from network-controlled data as (ule_sndu_type & 0x00FF), giving a range of 0-255. When htype equals 255, an out-of-bounds read occurs on the function pointer table, and the OOB value may be called as a function pointer.

Add a bounds check on htype against the array size before either table is accessed. Out-of-range values now cause the SNDU to be discarded.

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%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

April 6, 2026

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Sep 9, 2026
No patch confirmed yet.
generic

media: dvb-net: fix OOB access in ULE extension header tables - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/24d87712727a5017ad142d63940589a36cd25647
generic

media: dvb-net: fix OOB access in ULE extension header tables - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f2b65dcb78c8990e4c68a906627433be1fe38a92
generic

media: dvb-net: fix OOB access in ULE extension header tables - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe
generic

media: dvb-net: fix OOB access in ULE extension header tables - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/145e50c2c700fa52b840df7bab206043997dd18e
generic

media: dvb-net: fix OOB access in ULE extension header tables - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1a6da3dbb9985d00743073a1cc1f96e59f5abc30
generic

media: dvb-net: fix OOB access in ULE extension header tables - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/29ef43ceb121d67b87f4cbb08439e4e9e732eff8
generic

media: dvb-net: fix OOB access in ULE extension header tables - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b2bd2ee73b697c177157bba534e1b1064c2e66a0
generic

media: dvb-net: fix OOB access in ULE extension header tables - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e51238718217c4abdb3ccc3b0c0cde265c7ec629

Vendor Advisories for CVE-2026-31405(1)

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

Patch Availability(18)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-07-26ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-07-26ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-07-26ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-07-26ubuntu
ubuntulinux-tools-lowlatency-hwe-22.04-edge (6.8.0-136.136.2~22.04.1) @ jammy2026-07-26ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-07-26ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-07-26ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-07-26ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-07-26ubuntu
ubuntulinux-tools-ibm-edge (5.15.0.1106.110~20.04.1) @ focal2026-07-26ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-07-26ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-07-26ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-07-26ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-07-26ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-07-26ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-07-26ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-07-26ubuntu
linuxKernel @ 5.10.253—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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (53 versions)5.10.257-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.164-1~deb11u1 (16 versions)6.1.170-1~deb11u1—
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 (122 versions)6.19.10-1—

Weakness Classification(1)

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

All Vendor Advisories

(25)

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 5× in last 7d / 34× 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 280 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 14:52 UTCEPSS rescore
  4. 2026-09-10 09:34 UTCEPSS rescore
  5. 2026-09-08 22:00 UTCEPSS rescore
  6. 2026-09-07 16:01 UTCEPSS rescore
  7. 2026-09-06 13:47 UTCEPSS rescore
  8. 2026-09-06 13:47 UTCEPSS rescore
  9. 2026-09-04 05:06 UTCEPSS rescore
  10. 2026-09-03 00:30 UTCOSV refresh
  11. 2026-09-02 14:11 UTCEPSS rescore
  12. 2026-09-01 13:53 UTCEPSS rescore
  13. 2026-09-01 04:39 UTCEPSS rescore
  14. 2026-09-01 04:39 UTCEPSS rescore
  15. 2026-08-30 19:17 UTCEPSS rescore
  16. 2026-08-30 01:22 UTCEPSS rescore
  17. 2026-08-28 21:41 UTCEPSS rescore
  18. 2026-08-27 14:25 UTCEPSS rescore
  19. 2026-08-26 14:46 UTCEPSS rescore
  20. 2026-08-25 13:49 UTCEPSS rescore
  21. 2026-08-24 14:17 UTCEPSS rescore
  22. 2026-08-23 00:19 UTCEPSS rescore
  23. 2026-08-21 23:49 UTCEPSS rescore
  24. 2026-08-20 22:55 UTCEPSS rescore
  25. 2026-08-20 22:55 UTCEPSS rescore
Show 75 more
  1. 2026-08-19 17:03 UTCEPSS rescore
  2. 2026-08-18 13:48 UTCEPSS rescore
  3. 2026-08-17 13:47 UTCEPSS rescore
  4. 2026-08-16 14:56 UTCEPSS rescore
  5. 2026-08-16 12:37 UTCVendor advisory
  6. 2026-08-16 12:37 UTCGHSA enrichment
  7. 2026-08-16 08:27 UTCEG score recompute
  8. 2026-08-16 08:27 UTCVendor advisory
  9. 2026-08-16 08:27 UTCGHSA enrichment
  10. 2026-08-16 02:14 UTCEPSS rescore
  11. 2026-08-15 01:30 UTCEPSS rescore
  12. 2026-08-14 22:58 UTCVendor advisory
  13. 2026-08-14 22:58 UTCGHSA enrichment
  14. 2026-08-14 18:48 UTCVendor advisory
  15. 2026-08-14 18:48 UTCGHSA enrichment
  16. 2026-08-14 13:55 UTCVendor advisory
  17. 2026-08-14 13:55 UTCGHSA enrichment
  18. 2026-08-14 09:45 UTCVendor advisory
  19. 2026-08-14 09:45 UTCGHSA enrichment
  20. 2026-08-14 05:35 UTCEG score recompute
  21. 2026-08-14 05:35 UTCVendor advisory
  22. 2026-08-14 05:35 UTCGHSA enrichment
  23. 2026-08-13 22:00 UTCEPSS rescore
  24. 2026-08-13 09:46 UTCVendor advisory
  25. 2026-08-13 09:46 UTCGHSA enrichment
  26. 2026-08-13 04:10 UTCVendor advisory
  27. 2026-08-13 04:10 UTCGHSA enrichment
  28. 2026-08-13 00:00 UTCVendor advisory
  29. 2026-08-13 00:00 UTCGHSA enrichment
  30. 2026-08-12 19:50 UTCEG score recompute
  31. 2026-08-12 19:50 UTCVendor advisory
  32. 2026-08-12 19:50 UTCGHSA enrichment
  33. 2026-08-12 13:50 UTCEPSS rescore
  34. 2026-08-12 00:38 UTCVendor advisory
  35. 2026-08-12 00:38 UTCGHSA enrichment
  36. 2026-08-11 20:10 UTCEG score recompute
  37. 2026-08-11 20:10 UTCVendor advisory
  38. 2026-08-11 20:10 UTCGHSA enrichment
  39. 2026-08-11 07:29 UTCVendor advisory
  40. 2026-08-11 07:29 UTCGHSA enrichment
  41. 2026-08-11 03:20 UTCEG score recompute
  42. 2026-08-11 03:20 UTCVendor advisory
  43. 2026-08-11 03:19 UTCGHSA enrichment
  44. 2026-08-11 00:00 UTCEPSS rescore
  45. 2026-08-10 09:47 UTCVendor advisory
  46. 2026-08-10 09:47 UTCGHSA enrichment
  47. 2026-08-10 05:37 UTCVendor advisory
  48. 2026-08-10 05:37 UTCGHSA enrichment
  49. 2026-08-10 01:27 UTCVendor advisory
  50. 2026-08-10 01:27 UTCGHSA enrichment
  51. 2026-08-09 21:16 UTCVendor advisory
  52. 2026-08-09 21:16 UTCGHSA enrichment
  53. 2026-08-09 17:06 UTCEG score recompute
  54. 2026-08-09 17:06 UTCVendor advisory
  55. 2026-08-09 17:06 UTCGHSA enrichment
  56. 2026-08-09 13:46 UTCEPSS rescore
  57. 2026-08-09 12:56 UTCVendor advisory
  58. 2026-08-09 12:56 UTCGHSA enrichment
  59. 2026-08-09 05:06 UTCEG score recompute
  60. 2026-08-09 05:06 UTCVendor advisory
  61. 2026-08-09 05:06 UTCGHSA enrichment
  62. 2026-08-08 16:37 UTCEPSS rescore
  63. 2026-08-08 07:51 UTCVendor advisory
  64. 2026-08-08 07:51 UTCGHSA enrichment
  65. 2026-08-08 03:41 UTCVendor advisory
  66. 2026-08-08 03:41 UTCGHSA enrichment
  67. 2026-08-07 23:31 UTCVendor advisory
  68. 2026-08-07 23:31 UTCGHSA enrichment
  69. 2026-08-07 19:21 UTCEG score recompute
  70. 2026-08-07 19:21 UTCVendor advisory
  71. 2026-08-07 19:21 UTCGHSA enrichment
  72. 2026-08-07 15:11 UTCVendor advisory
  73. 2026-08-07 15:11 UTCGHSA enrichment
  74. 2026-08-06 17:39 UTCEG score recompute
  75. 2026-08-06 17:39 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-31405?
CVE-2026-31405 is a critical vulnerability published on April 6, 2026. In the Linux kernel, the following vulnerability has been resolved: media: dvb-net: fix OOB access in ULE extension header tables The ulemandatoryexthandlers[] and uleoptionalexthandlers[] tables in handleoneule_extension() are declared with 255 elements (valid indices 0-254), but the index htype…
When was CVE-2026-31405 disclosed?
CVE-2026-31405 was first published in the National Vulnerability Database on April 6, 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-2026-31405 actively exploited?
CVE-2026-31405 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 55.6% of all scored CVEs.
What is the CVSS score of CVE-2026-31405?
CVE-2026-31405 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-31405?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31405, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-31405

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