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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-80794

nfc: nci: fix uninit-value in the RF discover/activated NTF handlers

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: nfc: nci: fix uninit-value in the RF discover/activated NTF handlers nci_rf_discover_ntf_packet() and nci_rf_intf_activated_ntf_packet() each parse a notification into an on-stack struct (nci_rf_discover_ntf / nci_rf_intf_activated_ntf) that is not initialised. The RF technology-specific parameters are only extracted when rf_tech_specific_params_len is non-zero, so a notification that reports a zero length leaves the rf_tech_specific_params union uninitialised - and both handlers then pass it to nci_add_new_protocol(), which reads it: - discover: nci_add_new_target() -> nci_add_new_protocol(); - activated: nci_target_auto_activated() -> nci_add_new_protocol(). nci_add_new_protocol() uses nfca_poll->nfcid1_len as both a branch condition and a memcpy() length and copies nfcid1/sens_res/sel_res into ndev->targets, which is later exposed to user space via NFC_CMD_GET_TARGET. BUG: KMSAN: uninit-value in nci_add_new_protocol+0x624/0x6c0 nci_add_new_protocol+0x624/0x6c0 nci_ntf_packet+0x25b2/0x3c30 nci_rx_work+0x318/0x5d0 process_scheduled_works+0x84b/0x17a0 worker_thread+0xc10/0x11b0 kthread+0x376/0x500 Local variable ntf.i created at: nci_ntf_packet+0xbc2/0x3c30 Zero-initialise both on-stack notifications so the union reads back as zero when no technology-specific parameters are present.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < 1007a6b429d756513abd25bd00290908f2e89a4aaffected
  • e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < 4bda9ef8392710f21e99027467f3f4afdfb5c99aaffected
  • e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < fe69fed3495f676578d49414a069ad7d8468e2ceaffected
  • e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < 7489f59d1ea2d3298aa41de7baf193e5e6e132f6affected
  • e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < 7086dab72b3ed95df96842801e10e935cfeb27a3affected
  • e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < 0d4b5cfab6891a5ca0f6aef209beebba4bd7c095affected
  • e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < 5bd00c0e1470d90d77a7c60242854257ddf14e00affected
  • e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < d6f743d3d388913135681cde051c08823730194faffected
  • e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < 8cbe06c1e699c0a165dae5093a2550e65f914818affected

Linux Linux

Default version status: affected

  • 3.3affected
  • 0 to < 3.3unaffected
  • 5.10.269 to ≤ 5.10.*unaffected
  • 5.15.218 to ≤ 5.15.*unaffected
  • 6.1.185 to ≤ 6.1.*unaffected
  • 6.6.154 to ≤ 6.6.*unaffected
  • 6.12.106 to ≤ 6.12.*unaffected
  • 6.18.47 to ≤ 6.18.*unaffected
  • 7.1.11 to ≤ 7.1.*unaffected
  • 7.2.1 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References