{"id":"CVE-2026-98612","published":"2026-10-18T16:17:14.030","lastModified":"2026-10-19T10:19:23.413","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: catc: bound the RX packet length in catc_rx_done()\n\ncatc_rx_done() walks a multi-packet URB, reading a two-byte length from\neach packet header. Its bound, pkt_len > urb->actual_length, ignores the\nheader offset and compares against the whole transfer rather than the\nbytes left from pkt_start, so a crafted packet header makes\nskb_copy_to_linear_data() read past the buffer.\n\nA length below ETH_HLEN is also accepted, including zero, and\neth_type_trans() then reads a MAC header from the uninitialised tailroom\nof a shorter skb. The is_f5u011 branch takes its length straight from\nthe transfer, so a zero-length URB reaches the same path.\n\nTrack the bytes remaining from the current packet, and reject a header\nthat does not fit, a length past what is left, and a length below an\nEthernet header.\n\nA transfer shorter than an Ethernet header, including a zero-length one,\npreviously became a runt skb passed to netif_rx() and counted as\nreceived; it is now counted in rx_length_errors and ends the walk.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/21e206dd88b3de6e36bb607dec3797c59bc3007b","tags":[]},{"url":"https://git.kernel.org/stable/c/2f87bbd5a7bf6ee79d598f7e22cf77810d29ae87","tags":[]},{"url":"https://git.kernel.org/stable/c/3942557938f846e7481f6ccb2b41ccbdee61baa1","tags":[]},{"url":"https://git.kernel.org/stable/c/4cc0a8eb2f9336cfa3e4ac329bc5585ca970ced3","tags":[]},{"url":"https://git.kernel.org/stable/c/801e21cf7dd6bcee31db907625d5045f21c9c1d9","tags":[]},{"url":"https://git.kernel.org/stable/c/9d4be026bdff2c1da7b6c7e01c0a47f2df409e97","tags":[]},{"url":"https://git.kernel.org/stable/c/9d565b6b72fe3f41fd43636e143072848105189f","tags":[]},{"url":"https://git.kernel.org/stable/c/dd9c6f8f05170223edec2dac476606cd40d9acb7","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}