CVE-2026-90221 (GCVE-0-2026-90221)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:07 – Updated: 2026-09-17 16:07
VLAI
Title
nfc: nci: fix use of uninitialized memory in CORE_INIT_RSP parsing
Summary
In 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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: bcd684aace34fedbd473fbd9b21ed06b0c2d2212 , < baed3fdf6ed2195c56f25ae18a086b938dcd3983 (git)
Affected: bcd684aace34fedbd473fbd9b21ed06b0c2d2212 , < 2f434478771a4ebdd535033561c0590bcde39753 (git)
Affected: bcd684aace34fedbd473fbd9b21ed06b0c2d2212 , < 5487f04c1ccbfa15aa6e531eb1ec9c9ec9c7bf31 (git)
Affected: bcd684aace34fedbd473fbd9b21ed06b0c2d2212 , < bbe68e8249e2c76d65adfd9224fa95f1ca0fbe4e (git)
Affected: bcd684aace34fedbd473fbd9b21ed06b0c2d2212 , < 4f0483bbcdaccc9d4aee30df7351863334cecfa7 (git)
Affected: bcd684aace34fedbd473fbd9b21ed06b0c2d2212 , < 7d44b897bff84edcd4814899314d661ad4956a8e (git)
Affected: bcd684aace34fedbd473fbd9b21ed06b0c2d2212 , < d56575a2595ee1f597f39e8a1cfb67ed3501678d (git)
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Linux Linux Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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          "value": "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."
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            "value": "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": "CVE-2026-90221",
        "lastModified": "2026-09-17T17:17:17.550",
        "metrics": {},
        "published": "2026-09-17T17:17:17.550",
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        "vulnStatus": "Received"
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}



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