{"id":"AZL-94899","summary":"CVE-2026-68288 affecting package kernel 6.6.150.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD\n\nnet_dm_packet_report_fill() and net_dm_hw_packet_report_fill() open code\nthe NET_DM_ATTR_PAYLOAD attribute to avoid zeroing the packet payload\nbefore overwriting it with skb_copy_bits().\n\nskb_put() reserves nla_total_size(payload_len), i.e. the header plus the\nNLA_ALIGN() padding, but only payload_len bytes are copied in. When\npayload_len is not a multiple of 4 the 1-3 padding bytes are never\ninitialized and are leaked to user space inside the netlink message.\n\nKMSAN confirms the leak for the software path when the packet payload\nlength is not 4-byte aligned:\n\n  BUG: KMSAN: kernel-infoleak in _copy_to_iter\n   _copy_to_iter\n   __skb_datagram_iter\n   skb_copy_datagram_iter\n   netlink_recvmsg\n   sock_recvmsg\n   __sys_recvfrom\n  Uninit was created at:\n   kmem_cache_alloc_node_noprof\n   __alloc_skb\n   net_dm_packet_work\n  Bytes 173-175 of 176 are uninitialized\n\nUse __nla_reserve(), which sets up the attribute header and zeroes the\npadding, instead of open coding the attribute construction.","modified":"2026-09-02T06:51:55Z","published":"2026-08-10T13:20:18Z","upstream":["CVE-2026-68288"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68288"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.6.150.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-94899.json"}}],"schema_version":"1.9.0"}