CVE-2026-46321

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. the CNA's CVSS baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 4 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

A fix is available — apply it.

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

tun: free page on short-frame rejection in tun_xdp_one()

tun_xdp_one() returns -EINVAL on a frame shorter than ETH_HLEN without freeing the page that vhost_net_build_xdp() allocated for it. tun_sendmsg() discards that -EINVAL and still returns total_len, so vhost_tx_batch() takes the success path and never frees the page; each short frame in a batch leaks one page-frag chunk.

A local process that can open /dev/net/tun and /dev/vhost-net can hit this path: it attaches a tun/tap device as the vhost-net backend and feeds TX descriptors whose length minus the virtio-net header is below ETH_HLEN. Each kick leaks the page-frag chunks for that batch, and a tight submission loop exhausts host memory and triggers an OOM panic. Free the page before returning -EINVAL, matching the XDP-program error path in the same function.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

June 9, 2026

Last Modified

August 5, 2026

Advisory Details (4)

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

tun: free page on short-frame rejection in tun_xdp_one() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f4feb1e20058e407cb00f45aff47f5b7e19a6bbf
generic

tun: free page on short-frame rejection in tun_xdp_one() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/98c67be9eb9de72465a071949e84a3cdb8fab5a3
generic

tun: free page on short-frame rejection in tun_xdp_one() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/69863ff2720a0e9871f1a5710f2a33a94217fee0
generic

tun: free page on short-frame rejection in tun_xdp_one() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/37a1c268c2c8090bf4dc552d732bd23ba36f8eb0

Vendor Advisories for CVE-2026-46321(2)

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

Patch Availability(9)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-09-14ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-09-14ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-09-14ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-09-14ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-09-14ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-09-14ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-09-14ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-09-14ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-14ubuntu

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 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (141 versions)7.0.12-1—

Additional Vendor Advisories

(9)

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 9× in last 7d / 48× 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 310 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-46321?
CVE-2026-46321 is a high vulnerability published on June 9, 2026. In the Linux kernel, the following vulnerability has been resolved: tun: free page on short-frame rejection in tunxdpone() tunxdpone() returns -EINVAL on a frame shorter than ETH_HLEN without freeing the page that vhostnetbuild_xdp() allocated for it. tunsendmsg() discards that -EINVAL and still…
When was CVE-2026-46321 disclosed?
CVE-2026-46321 was first published in the National Vulnerability Database on June 9, 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-2026-46321 actively exploited?
CVE-2026-46321 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 97.1% of all scored CVEs.
What is the CVSS score of CVE-2026-46321?
CVE-2026-46321 has a CVSS v4.0 base score of 7.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-46321?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46321, 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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