CVE-2025-38413
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-07-25

Last updated on: 2025-11-19

Assigner: kernel.org

Description
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.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2025-07-25
Last Modified
2025-11-19
Generated
2026-05-07
AI Q&A
2025-07-25
EPSS Evaluated
2026-05-05
NVD
CVE-2025-38413
Affected Vendors & Products
Showing 6 associated CPEs
Vendor Product Version / Range
linux linux_kernel 6.16
linux linux_kernel 6.16
linux linux_kernel 6.16
linux linux_kernel 6.16
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-NVD-CWE-noinfo
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability in the Linux kernel's virtio-net driver involves an incorrect length check for received network frames when using XDP sockets (xsk). Specifically, the length of the frame data passed to buf_to_xdp was checked against a size that incorrectly included the virtio header length for the first buffer, which actually should not include it. This mismatch could lead to improper handling of frame lengths. The fix involves differentiating the first buffer from others to correctly calculate the maximum frame length and prevent incorrect length checks.


How can this vulnerability impact me? :

The vulnerability could cause improper processing of network frames in the virtio-net driver, potentially leading to data corruption, crashes, or unexpected behavior in network packet handling. This could affect the stability and reliability of systems using virtio-net with XDP sockets, possibly impacting network performance or security.


Ask Our AI Assistant
Need more information? Ask your question to get an AI reply (Powered by our expertise)
0/70
EPSS Chart