{"id":"AZL-108708","summary":"CVE-2026-98612 affecting package kernel 6.6.157.1-1","details":"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 \u003e urb-\u003eactual_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.","modified":"2026-10-20T05:35:13Z","published":"2026-10-18T16:17:14Z","upstream":["CVE-2026-98612"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98612"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.6.157.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-108708.json"}}],"schema_version":"1.9.0"}