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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 6100e0237204890269e3f934acfc50d35fd6f319, < 0a6f46a9332ad6958992d64d3b3a81a80b2ca940; >= 589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2, < 0e8211fcf9426f5adddf32516ba0f400ceb9544d; >= ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146, < e915445942af6dcea628bf66d6241641201a0c41; >= d5ad89b7d01ed4e66fd04734fc63d6e78536692a, < 5b34f9e4fe2f203724a6e893d6df0316b9670057; >= 049584807f1d797fc3078b68035450a9769eb5c3, < 69863ff2720a0e9871f1a5710f2a33a94217fee0; >= 049584807f1d797fc3078b68035450a9769eb5c3, < 37a1c268c2c8090bf4dc552d732bd23ba36f8eb0; >= 049584807f1d797fc3078b68035450a9769eb5c3, < 98c67be9eb9de72465a071949e84a3cdb8fab5a3; >= 049584807f1d797fc3078b68035450a9769eb5c3, < f4feb1e20058e407cb00f45aff47f5b7e19a6bbf; 32b0aaba5dbc85816898167d9b5d45a22eae82e9; a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb; 8418f55302fa1d2eeb73e16e345167e545c598a5; >= 5.10.223, < 5.10.259; >= 5.15.164, < 5.15.210; >= 6.1.102, < 6.1.176; >= 6.6.43, < 6.6.143; >= 5.4.281, < 5.5; >= 6.9.12, < 6.10; >= 6.10.2, < 6.11 |
| Linux | Linux | 6.11 |
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | < * |
References
- https://git.kernel.org/stable/c/0a6f46a9332ad6958992d64d3b3a81a80b2ca940Patch
- https://git.kernel.org/stable/c/0e8211fcf9426f5adddf32516ba0f400ceb9544dPatch
- https://git.kernel.org/stable/c/37a1c268c2c8090bf4dc552d732bd23ba36f8eb0Patch
- https://git.kernel.org/stable/c/5b34f9e4fe2f203724a6e893d6df0316b9670057Patch
- https://git.kernel.org/stable/c/69863ff2720a0e9871f1a5710f2a33a94217fee0Patch
- https://git.kernel.org/stable/c/98c67be9eb9de72465a071949e84a3cdb8fab5a3Patch
- https://git.kernel.org/stable/c/e915445942af6dcea628bf66d6241641201a0c41Patch
- https://git.kernel.org/stable/c/f4feb1e20058e407cb00f45aff47f5b7e19a6bbfPatch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
Timeline
- Published
- Jun 9, 2026
- Last modified
- Oct 15, 2026
- NVD status
- Modified