cbcvebase.
CVE-2025-38413
published 2025-07-25

CVE-2025-38413: In the Linux kernel, the following vulnerability has been resolved: virtio-net: xsk: rx: fix the frame's length check When calling buf_to_xdp, the len argument…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.16%
5.8th percentile
In the Linux kernel, the following vulnerability has been resolved: virtio-net: xsk: rx: fix the frame's length check When calling buf_to_xdp, the len argument is the frame data's length without virtio header's length (vi->hdr_len). We check that len with xsk_pool_get_rx_frame_size() + vi->hdr_len to ensure the provided len does not larger than the allocated chunk size. The additional vi->hdr_len is because in virtnet_add_recvbuf_xsk, we use part of XDP_PACKET_HEADROOM for virtio header and ask the vhost to start placing data from hard_start + XDP_PACKET_HEADROOM - vi->hdr_len not hard_start + XDP_PACKET_HEADROOM But the first buffer has virtio_header, so the maximum frame's length in the first buffer can only be xsk_pool_get_rx_frame_size() not xsk_pool_get_rx_frame_size() + vi->hdr_len like in the current check. This commit adds an additional argument to buf_to_xdp differentiate between the first buffer and other ones to correctly calculate the maximum frame's length.

Affected

13 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.12.37-1 (forky)linux 6.12.37-1 (forky)
linuxlinux
linuxlinux>= a4e7ba7027012f009f22a68bcfde670f9298d3a4 < 892f6ed9a4a38bb3360fdff091b9241cfa105b61892f6ed9a4a38bb3360fdff091b9241cfa105b61
linuxlinux>= a4e7ba7027012f009f22a68bcfde670f9298d3a4 < 6013bb6bc24c2cac3f45b37a15b71b232a5b00ff6013bb6bc24c2cac3f45b37a15b71b232a5b00ff
linuxlinux>= a4e7ba7027012f009f22a68bcfde670f9298d3a4 < 5177373c31318c3c6a190383bfd232e6cf565c365177373c31318c3c6a190383bfd232e6cf565c36
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.12.37-16.12.37-1
linuxlinux_kernel>= 0 < 6.12.37-16.12.37-1
linuxlinux_kernel>= 6.11 < 6.12.376.12.37
linuxlinux_kernel>= 6.13 < 6.15.66.15.6

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.6MEDIUM
vendor_ubuntu5.6MEDIUM
vendor_debian5.5LOW
vendor_redhat5.5MEDIUM
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