nfc: nci: fix uninit-value in the RF discover/activated NTF handlers
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.
CVE-2026-80794
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-80794
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20",
"lessThan": "1007a6b429d756513abd25bd00290908f2e89a4a",
"versionType": "git"
},
{
"status": "affected",
"version": "e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20",
"lessThan": "4bda9ef8392710f21e99027467f3f4afdfb5c99a",
"versionType": "git"
},
{
"status": "affected",
"version": "e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20",
"lessThan": "fe69fed3495f676578d49414a069ad7d8468e2ce",
"versionType": "git"
},
{
"status": "affected",
"version": "e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20",
"lessThan": "7489f59d1ea2d3298aa41de7baf193e5e6e132f6",
"versionType": "git"
},
{
"status": "affected",
"version": "e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20",
"lessThan": "7086dab72b3ed95df96842801e10e935cfeb27a3",
"versionType": "git"
},
{
"status": "affected",
"version": "e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20",
"lessThan": "0d4b5cfab6891a5ca0f6aef209beebba4bd7c095",
"versionType": "git"
},
{
"status": "affected",
"version": "e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20",
"lessThan": "5bd00c0e1470d90d77a7c60242854257ddf14e00",
"versionType": "git"
},
{
"status": "affected",
"version": "e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20",
"lessThan": "d6f743d3d388913135681cde051c08823730194f",
"versionType": "git"
},
{
"status": "affected",
"version": "e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20",
"lessThan": "8cbe06c1e699c0a165dae5093a2550e65f914818",
"versionType": "git"
}
],
"programFiles": [
"net/nfc/nci/ntf.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.269",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.218",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.185",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.154",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.106",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.47",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.11",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2.1",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/nfc/nci/ntf.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80794
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #34811 · Revision 1
- Added to Heist Feed
- Publisher date