CVE-2026-46320 (GCVE-0-2026-46320)

Vulnerability from cvelistv5 – Published: 2026-06-09 12:11 – Updated: 2026-06-19 12:00
VLAI
Title
tap: free page on error paths in tap_get_user_xdp()
Summary
In the Linux kernel, the following vulnerability has been resolved: tap: free page on error paths in tap_get_user_xdp() tap_get_user_xdp() rejects a frame shorter than ETH_HLEN with -EINVAL, and returns -ENOMEM when build_skb() fails. Both paths jump to the err label without freeing the page that vhost_net_build_xdp() allocated for the frame. tap_sendmsg() discards the per-buffer return value and always returns 0, so vhost_tx_batch() takes the success path and never frees the page; each rejected frame in a batch leaks one page-frag chunk. Free the page on both error paths, before the skb is built. This is the tap counterpart of the same leak in tun_xdp_one().
Severity
7.4 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0efac27791ee068075d80f07c55a229b1335ce12 , < 8d03e65eb6cfbffec471a6b65416f93679bf3286 (git)
Affected: 0efac27791ee068075d80f07c55a229b1335ce12 , < f979971835dddbca86cf99e3b2e2b94a408a1ab2 (git)
Affected: 0efac27791ee068075d80f07c55a229b1335ce12 , < 3f52a86a482a69294c50a5a2a097bd6f4104990a (git)
Affected: 0efac27791ee068075d80f07c55a229b1335ce12 , < d30aac0fa00ca0afc3e08174cf7f974a66bdcf05 (git)
Affected: 0efac27791ee068075d80f07c55a229b1335ce12 , < d68eab61944a9b0826fa2e954e42db1aa3201b7a (git)
Affected: 0efac27791ee068075d80f07c55a229b1335ce12 , < e27c17346628cb56843a83f93ac63c314c00f388 (git)
Affected: 0efac27791ee068075d80f07c55a229b1335ce12 , < 18a84c35842e19cd3c5534d8cee73d31863f696d (git)
Affected: 0efac27791ee068075d80f07c55a229b1335ce12 , < 3bcf7aec6a9d16438f2cec29f5d7c8d5b8edf9b2 (git)
Create a notification for this product.
Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.94 , ≤ 6.12.* (semver)
Unaffected: 6.18.36 , ≤ 6.18.* (semver)
Unaffected: 7.0.12 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:42:13+00:00",
      "cve": "CVE-2026-46320",
      "id": "CVE-2026-46320",
      "initial_release_date": "2026-06-09T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tap: free page on error paths in tap_get_user_xdp()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46320.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-07-19T17:37:33Z",
      "cve": "CVE-2026-46320",
      "id": "CVE-2026-46320",
      "initial_release_date": "2026-06-10T02:25:51Z",
      "product_status:first_fixed": "31",
      "product_status:known_affected": "90",
      "product_status:known_not_affected": "20",
      "product_status:recommended": "296",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46320",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46320.json",
      "version": "12"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.