CVE-2026-46320

tap: free page on error paths in tap_get_user_xdp()

HIGH 7.4

At a glance

Source
NVD
EPSS
EPSS 0.25 % · percentile 17 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

Description

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().

Weaknesses (CWE)

  • CWE-401 — Missing Release of Memory after Effective Lifetime

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 7.4CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:HLinux
CVSS 3.1HIGH 7.4CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected 0efac27791ee068075d80f07c55a229b1335ce12 < 8d03e65eb6cfbffec471a6b65416f93679bf3286 ; affected 0efac27791ee068075d80f07c55a229b1335ce12 < f979971835dddbca86cf99e3b2e2b94a408a1ab2 ; affected 0efac27791ee068075d80f07c55a229b1335ce12 < 3f52a86a482a69294c50a5a2a097bd6f4104990a ; affected 0efac27791ee068075d80f07c55a229b1335ce12 < d30aac0fa00ca0afc3e08174cf7f974a66bdcf05 ; affected 0efac27791ee068075d80f07c55a229b1335ce12 < d68eab61944a9b0826fa2e954e42db1aa3201b7a ; affected 0efac27791ee068075d80f07c55a229b1335ce12 < e27c17346628cb56843a83f93ac63c314c00f388
Linux · Linuxaffected 4.20 ; unaffected 0 < 4.20 ; unaffected 5.10.259 ≤ 5.10.* ; unaffected 5.15.210 ≤ 5.15.* ; unaffected 6.1.176 ≤ 6.1.* ; unaffected 6.6.143 ≤ 6.6.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD