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.
CVSS breakdown
Affected products
- Linux / Linux6.9.12 – 6.10
- Linux / Linux6100e0237204890269e3f934acfc50d35fd6f319 – 0a6f46a9332ad6958992d64d3b3a81a80b2ca940
- Linux / Linux589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2 – 0e8211fcf9426f5adddf32516ba0f400ceb9544d
- Linux / Linuxad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146 – e915445942af6dcea628bf66d6241641201a0c41
- Linux / Linuxd5ad89b7d01ed4e66fd04734fc63d6e78536692a – 5b34f9e4fe2f203724a6e893d6df0316b9670057
- Linux / Linux049584807f1d797fc3078b68035450a9769eb5c3 – 69863ff2720a0e9871f1a5710f2a33a94217fee0
- Linux / Linux049584807f1d797fc3078b68035450a9769eb5c3 – 37a1c268c2c8090bf4dc552d732bd23ba36f8eb0
- Linux / Linux049584807f1d797fc3078b68035450a9769eb5c3 – 98c67be9eb9de72465a071949e84a3cdb8fab5a3
- Linux / Linux049584807f1d797fc3078b68035450a9769eb5c3 – f4feb1e20058e407cb00f45aff47f5b7e19a6bbf
- Linux / Linux32b0aaba5dbc85816898167d9b5d45a22eae82e9 – 32b0aaba5dbc85816898167d9b5d45a22eae82e9
- Linux / Linuxa9d1c27e2ee3b0ea5d40c105d6e728fc114470bb – a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb
- Linux / Linux8418f55302fa1d2eeb73e16e345167e545c598a5 – 8418f55302fa1d2eeb73e16e345167e545c598a5
- Linux / Linux5.10.223 – 5.10.259
- Linux / Linux5.15.164 – 5.15.210
- Linux / Linux6.1.102 – 6.1.176
- Linux / Linux6.6.43 – 6.6.143
- Linux / Linux5.4.281 – 5.5
- Linux / Linux6.10.2 – 6.11
- Linux / Linux6.11 – 6.11
- Linux / Linux0 – 6.11
- Linux / Linux5.10.259 – 5.10.*
- Linux / Linux5.15.210 – 5.15.*
- Linux / Linux6.1.176 – 6.1.*
- Linux / Linux6.6.143 – 6.6.*
- Linux / Linux6.12.93 – 6.12.*
- Linux / Linux6.18.35 – 6.18.*
- Linux / Linux7.0.12 – 7.0.*
- Linux / Linux7.1 – *
References
- MISChttps://git.kernel.org/stable/c/0a6f46a9332ad6958992d64d3b3a81a80b2ca940
- MISChttps://git.kernel.org/stable/c/0e8211fcf9426f5adddf32516ba0f400ceb9544d
- MISChttps://git.kernel.org/stable/c/e915445942af6dcea628bf66d6241641201a0c41
- MISChttps://git.kernel.org/stable/c/5b34f9e4fe2f203724a6e893d6df0316b9670057
- MISChttps://git.kernel.org/stable/c/69863ff2720a0e9871f1a5710f2a33a94217fee0
- MISChttps://git.kernel.org/stable/c/37a1c268c2c8090bf4dc552d732bd23ba36f8eb0
- MISChttps://git.kernel.org/stable/c/98c67be9eb9de72465a071949e84a3cdb8fab5a3
- MISChttps://git.kernel.org/stable/c/f4feb1e20058e407cb00f45aff47f5b7e19a6bbf