GHSA-H298-HPMC-3W4V
Vulnerability from github – Published: 2026-09-17 18:31 – Updated: 2026-09-17 18:31In the Linux kernel, the following vulnerability has been resolved:
nfc: nci: fix use of uninitialized memory in CORE_INIT_RSP parsing
nci_core_init_rsp_packet_v1() and nci_core_init_rsp_packet_v2() parse the CORE_INIT_RSP packet without validating that the skb contains enough data. A malformed response (e.g. injected via virtual_ncidev) can declare a large num_supported_rf_interfaces while providing insufficient data, causing reads of uninitialized slab memory. This is later used in nci_init_complete_req(), triggering a KMSAN uninit-value warning.
Add skb length checks before accessing packet fields: - Validate the skb has at least 1 byte for the status field. - Validate the skb can hold the fixed-size header before parsing. - In v2, bounds-check each variable-length rf_interface entry and its extension parameters within the parsing loop. - In v1, verify the skb is large enough for both the variable-length rf_interfaces array and the trailing rsp_2 structure.
{
"affected": [],
"aliases": [
"CVE-2026-90221"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:17:17Z",
"severity": null
},
"details": "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 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.",
"id": "GHSA-h298-hpmc-3w4v",
"modified": "2026-09-17T18:31:56Z",
"published": "2026-09-17T18:31:56Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90221"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2f434478771a4ebdd535033561c0590bcde39753"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4f0483bbcdaccc9d4aee30df7351863334cecfa7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5487f04c1ccbfa15aa6e531eb1ec9c9ec9c7bf31"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7d44b897bff84edcd4814899314d661ad4956a8e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/baed3fdf6ed2195c56f25ae18a086b938dcd3983"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bbe68e8249e2c76d65adfd9224fa95f1ca0fbe4e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d56575a2595ee1f597f39e8a1cfb67ed3501678d"
}
],
"schema_version": "1.4.0",
"severity": []
}
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