CVE-2026-46321
tun: free page on short-frame rejection in tun_xdp_one()
HIGH 7.1
At a glance
- Source
- NVD
- EPSS
- EPSS 0.13 % · percentile 3 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
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.
References
- https://git.kernel.org/stable/c/0a6f46a9332ad6958992d64d3b3a81a80b2ca940
- https://git.kernel.org/stable/c/0e8211fcf9426f5adddf32516ba0f400ceb9544d
- https://git.kernel.org/stable/c/e915445942af6dcea628bf66d6241641201a0c41
- https://git.kernel.org/stable/c/5b34f9e4fe2f203724a6e893d6df0316b9670057
- https://git.kernel.org/stable/c/69863ff2720a0e9871f1a5710f2a33a94217fee0
- https://git.kernel.org/stable/c/37a1c268c2c8090bf4dc552d732bd23ba36f8eb0
- https://git.kernel.org/stable/c/98c67be9eb9de72465a071949e84a3cdb8fab5a3
- https://git.kernel.org/stable/c/f4feb1e20058e407cb00f45aff47f5b7e19a6bbf
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | Linux |
| CVSS 3.1 | HIGH 7.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-35411
- GCVE · GCVE-0-2026-46321
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1333 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1298 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1286 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1252 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1229 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1162 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1066 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1064 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1029 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0954 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0927 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0926 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0862 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0809 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.4.281 < 5.5cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.10.223 < 5.10.259cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.15.164 < 5.15.210cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.1.102 < 6.1.176cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.6.43 < 6.6.143cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.9.12 < 6.10cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.10.2 < 6.12.93cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.13 < 6.18.35cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.19 < 7.0.12cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 6100e0237204890269e3f934acfc50d35fd6f319 < 0a6f46a9332ad6958992d64d3b3a81a80b2ca940 ; affected 589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2 < 0e8211fcf9426f5adddf32516ba0f400ceb9544d ; affected ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146 < e915445942af6dcea628bf66d6241641201a0c41 ; affected d5ad89b7d01ed4e66fd04734fc63d6e78536692a < 5b34f9e4fe2f203724a6e893d6df0316b9670057 ; affected 049584807f1d797fc3078b68035450a9769eb5c3 < 69863ff2720a0e9871f1a5710f2a33a94217fee0 ; affected 049584807f1d797fc3078b68035450a9769eb5c3 < 37a1c268c2c8090bf4dc552d732bd23ba36f8eb0 |
| Linux · Linux | affected 6.11 ; unaffected 0 < 6.11 ; 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
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |