{"id":"CVE-2026-90221","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: fix use of uninitialized memory in CORE_INIT_RSP parsing\n\nnci_core_init_rsp_packet_v1() and nci_core_init_rsp_packet_v2() parse\nthe CORE_INIT_RSP packet witho…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: fix use of uninitialized memory in CORE_INIT_RSP parsing\n\nnci_core_init_rsp_packet_v1() and nci_core_init_rsp_packet_v2() parse\nthe CORE_INIT_RSP packet witho…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= bcd684aace34fedbd473fbd9b21ed06b0c2d2212 < baed3fdf6ed2195c56f25ae18a086b938dcd3983","Linux >= bcd684aace34fedbd473fbd9b21ed06b0c2d2212 < 2f434478771a4ebdd535033561c0590bcde39753","Linux >= bcd684aace34fedbd473fbd9b21ed06b0c2d2212 < 5487f04c1ccbfa15aa6e531eb1ec9c9ec9c7bf31","Linux >= bcd684aace34fedbd473fbd9b21ed06b0c2d2212 < bbe68e8249e2c76d65adfd9224fa95f1ca0fbe4e","Linux >= bcd684aace34fedbd473fbd9b21ed06b0c2d2212 < 4f0483bbcdaccc9d4aee30df7351863334cecfa7","Linux >= bcd684aace34fedbd473fbd9b21ed06b0c2d2212 < 7d44b897bff84edcd4814899314d661ad4956a8e","Linux >= bcd684aace34fedbd473fbd9b21ed06b0c2d2212 < d56575a2595ee1f597f39e8a1cfb67ed3501678d","Linux 5.11"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:17.550","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90221","references":[{"url":"https://git.kernel.org/stable/c/2f434478771a4ebdd535033561c0590bcde39753","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4f0483bbcdaccc9d4aee30df7351863334cecfa7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5487f04c1ccbfa15aa6e531eb1ec9c9ec9c7bf31","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7d44b897bff84edcd4814899314d661ad4956a8e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/baed3fdf6ed2195c56f25ae18a086b938dcd3983","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bbe68e8249e2c76d65adfd9224fa95f1ca0fbe4e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d56575a2595ee1f597f39e8a1cfb67ed3501678d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.855Z","epss":0.00205,"epssPercentile":0.1089,"slug":"CVE-2026-90221","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: fix use of uninitialized memory in CORE_INIT_RSP parsing\n\nnci_core_init_rsp_packet_v1() and nci_core_init_rsp_packet_v2() parse\nthe CORE_INIT_RSP packet without validating that the skb contains\nenough data. A malformed response (e.g. injected via virtual_ncidev)\ncan declare a large num_supported_rf_interfaces while providing\ninsufficient data, causing reads of uninitialized slab memory. This\nis later used in nci_init_complete_req(), triggering a KMSAN\nuninit-value warning.\n\nAdd skb length checks before accessing packet fields:\n- Validate the skb has at least 1 byte for the status field.\n- Validate the skb can hold the fixed-size header before parsing.\n- In v2, bounds-check each variable-length rf_interface entry and its\n  extension parameters within the parsing loop.\n- In v1, verify the skb is large enough for both the variable-length\n  rf_interfaces array and the trailing rsp_2 structure.\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":[]}