{"id":"CVE-2026-98612","title":"net: usb: catc: bound the RX packet length in catc_rx_done()","summary":"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…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3942557938f846e7481f6ccb2b41ccbdee61baa1","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2f87bbd5a7bf6ee79d598f7e22cf77810d29ae87","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4cc0a8eb2f9336cfa3e4ac329bc5585ca970ced3","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 21e206dd88b3de6e36bb607dec3797c59bc3007b","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 801e21cf7dd6bcee31db907625d5045f21c9c1d9","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < dd9c6f8f05170223edec2dac476606cd40d9acb7","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9d4be026bdff2c1da7b6c7e01c0a47f2df409e97","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9d565b6b72fe3f41fd43636e143072848105189f","Linux 2.6.12"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:19:32.790Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98612","references":[{"url":"https://git.kernel.org/stable/c/3942557938f846e7481f6ccb2b41ccbdee61baa1"},{"url":"https://git.kernel.org/stable/c/2f87bbd5a7bf6ee79d598f7e22cf77810d29ae87"},{"url":"https://git.kernel.org/stable/c/4cc0a8eb2f9336cfa3e4ac329bc5585ca970ced3"},{"url":"https://git.kernel.org/stable/c/21e206dd88b3de6e36bb607dec3797c59bc3007b"},{"url":"https://git.kernel.org/stable/c/801e21cf7dd6bcee31db907625d5045f21c9c1d9"},{"url":"https://git.kernel.org/stable/c/dd9c6f8f05170223edec2dac476606cd40d9acb7"},{"url":"https://git.kernel.org/stable/c/9d4be026bdff2c1da7b6c7e01c0a47f2df409e97"},{"url":"https://git.kernel.org/stable/c/9d565b6b72fe3f41fd43636e143072848105189f"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.243Z","slug":"CVE-2026-98612","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3942557938f846e7481f6ccb2b41ccbdee61baa1`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2f87bbd5a7bf6ee79d598f7e22cf77810d29ae87`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4cc0a8eb2f9336cfa3e4ac329bc5585ca970ced3`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 21e206dd88b3de6e36bb607dec3797c59bc3007b`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 801e21cf7dd6bcee31db907625d5045f21c9c1d9`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < dd9c6f8f05170223edec2dac476606cd40d9acb7`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9d4be026bdff2c1da7b6c7e01c0a47f2df409e97`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9d565b6b72fe3f41fd43636e143072848105189f`\n- `Linux 2.6.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}