{"id":"AZL-102068","summary":"CVE-2026-90115 affecting package kernel 6.6.150.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: fix NULL pointer dereference in __xsk_rcv()\n\nIn the __xsk_rcv() multi-buffer path, xsk_buff_alloc() is called in a\nloop without checking its return value. xsk_buff_can_alloc() only\ncounts fill queue entries without validating their addresses, so it\ncan succeed while xsk_buff_alloc() rejects all remaining entries and\nreturns NULL.\n\n  Oops: general protection fault, probably for non-canonical address\n   0xdffffc0000000000\n  KASAN: null-ptr-deref in range\n   [0x0000000000000000-0x0000000000000007]\n  RIP: 0010:__xsk_rcv+0x426/0xc20 (net/xdp/xsk.c:350)\n  Call Trace:\n   xsk_generic_rcv+0x26d/0x5f0\n   xdp_do_generic_redirect+0x3c5/0xcf0\n   do_xdp_generic+0x92f/0xe70\n   __netif_receive_skb_core.constprop.0+0xf7e/0x2b30\n\nFix this with a two-stage transaction. First allocate and stage all\nbuffers required for the packet, recycling all staged buffers with\nxsk_buff_free() if any allocation fails. Only after this stage\nsucceeds, copy the data, reserve the RX descriptors, and release the\nbuffers in an error-free loop.","modified":"2026-09-18T14:16:30.748325063Z","published":"2026-09-17T17:17:03Z","upstream":["CVE-2026-90115"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90115"}],"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-102068.json"}}],"schema_version":"1.9.0"}