{"id":"CVE-2026-90115","title":"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","summary":"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…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 804627751b4281dd95148e7564759145da67855e < aaebce297efc3e3dccb98a6ff838cfaa47db08db","Linux >= 804627751b4281dd95148e7564759145da67855e < 60d7d3559ce66e227e195e9463cdfed8077c8659","Linux >= 804627751b4281dd95148e7564759145da67855e < 214fb79b0379cb0214905632a2537c0c33f594eb","Linux >= 804627751b4281dd95148e7564759145da67855e < 8341bd3ff126d85bc8c4ed52eedcaa5b1a65f194","Linux >= 804627751b4281dd95148e7564759145da67855e < e37b2abca80473e106176e41712a369fd2f72117","Linux 6.6"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:03.623","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90115","references":[{"url":"https://git.kernel.org/stable/c/214fb79b0379cb0214905632a2537c0c33f594eb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/60d7d3559ce66e227e195e9463cdfed8077c8659","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8341bd3ff126d85bc8c4ed52eedcaa5b1a65f194","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/aaebce297efc3e3dccb98a6ff838cfaa47db08db","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e37b2abca80473e106176e41712a369fd2f72117","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.885Z","epss":0.002,"epssPercentile":0.10105,"slug":"CVE-2026-90115","body":"## Overview\n\nIn 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.\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":[]}