CVE-2026-46321

Vulnerability overview

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 de...

Affected product and versions

Product

Linux Linux, linux kernel

Affected versions

>= 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, >= 6.11, >= 6.10.2 < 6.12.93

Fixed versions

5.5, 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.10, 6.12.93, 6.18.35, 7.0.12

Technical data

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CWE

Not available