nfc: nci: fix uninit-value in the RF discover/activated NTF handlers
Summary
| CVE | CVE-2026-80794 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-04 16:18:05 UTC |
| Updated | 2026-09-04 16:18:05 UTC |
| 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. |
Risk And Classification
EPSS: 0.001950000 probability, percentile 0.092850000 (date 2026-09-07)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 1007a6b429d756513abd25bd00290908f2e89a4a git | Not specified |
| CNA | Linux | Linux | affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 4bda9ef8392710f21e99027467f3f4afdfb5c99a git | Not specified |
| CNA | Linux | Linux | affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 fe69fed3495f676578d49414a069ad7d8468e2ce git | Not specified |
| CNA | Linux | Linux | affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 7489f59d1ea2d3298aa41de7baf193e5e6e132f6 git | Not specified |
| CNA | Linux | Linux | affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 7086dab72b3ed95df96842801e10e935cfeb27a3 git | Not specified |
| CNA | Linux | Linux | affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 0d4b5cfab6891a5ca0f6aef209beebba4bd7c095 git | Not specified |
| CNA | Linux | Linux | affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 5bd00c0e1470d90d77a7c60242854257ddf14e00 git | Not specified |
| CNA | Linux | Linux | affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 d6f743d3d388913135681cde051c08823730194f git | Not specified |
| CNA | Linux | Linux | affected e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 8cbe06c1e699c0a165dae5093a2550e65f914818 git | Not specified |
| CNA | Linux | Linux | affected 3.3 | Not specified |
| CNA | Linux | Linux | unaffected 3.3 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.269 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.218 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.185 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.154 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.106 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.47 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.11 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.1 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/7086dab72b3ed95df96842801e10e935cfeb27a3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/fe69fed3495f676578d49414a069ad7d8468e2ce | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/0d4b5cfab6891a5ca0f6aef209beebba4bd7c095 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/4bda9ef8392710f21e99027467f3f4afdfb5c99a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/5bd00c0e1470d90d77a7c60242854257ddf14e00 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/7489f59d1ea2d3298aa41de7baf193e5e6e132f6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/1007a6b429d756513abd25bd00290908f2e89a4a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/8cbe06c1e699c0a165dae5093a2550e65f914818 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d6f743d3d388913135681cde051c08823730194f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.