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CVE-2026-80794— nfc: nci: fix uninit-value in the RF discover/activated NTF handlers

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于nci_rf_discover_ntf_packet和nci_rf_intf_activated_ntf_packet处理函数将通知解析到未初始化的栈结构，当RF技术特定参数长度为零时联合体未初始化，导致未初始化值被读取并可能暴露给用户空间。

AI Predicted 3.5 Difficulty: Moderate EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20< 1007a6b429d756513abd25bd00290908f2e89a4a affected
e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20< 4bda9ef8392710f21e99027467f3f4afdfb5c99a affected
e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20< fe69fed3495f676578d49414a069ad7d8468e2ce affected
e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20< 7489f59d1ea2d3298aa41de7baf193e5e6e132f6 affected
e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20< 7086dab72b3ed95df96842801e10e935cfeb27a3 affected
e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20< 0d4b5cfab6891a5ca0f6aef209beebba4bd7c095 affected
e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20< 5bd00c0e1470d90d77a7c60242854257ddf14e00 affected
e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20< d6f743d3d388913135681cde051c08823730194f affected
… +12 more rows
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I. Basic Information for CVE-2026-80794

Vulnerability Information
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Vulnerability Title
nfc: nci: fix uninit-value in the RF discover/activated NTF handlers
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于nci_rf_discover_ntf_packet和nci_rf_intf_activated_ntf_packet处理函数将通知解析到未初始化的栈结构，当RF技术特定参数长度为零时联合体未初始化，导致未初始化值被读取并可能暴露给用户空间。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 ~ 1007a6b429d756513abd25bd00290908f2e89a4a -
Linux Linux 3.3 -

II. Public POCs for CVE-2026-80794

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III. Intelligence Information for CVE-2026-80794

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Patches & Fixes for CVE-2026-80794 (7)

Vendor Advisories for CVE-2026-80794 (1)

Same Patch Batch · Linux · 2026-09-04 · 156 CVEs total

CVE-2026-80865 bpf: Add missing access_ok call to copy_user_syms
CVE-2026-80856 fuse: fix invalidate lock leak on setattr writeback failure
CVE-2026-80857 fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free
CVE-2026-80858 fuse: publish io-uring queues with release semantics
CVE-2026-80859 fuse: fix missing barrier when checking io-uring readiness
CVE-2026-80860 fuse: fix race between interrupt and resend
CVE-2026-80861 usb: xhci: bail out of setup if the controller is inaccessible
CVE-2026-80862 nvme-tcp: fix usage of page_frag_cache
CVE-2026-80863 RDMA/rxe: Fix OOB in free_rd_atomic_resources()
CVE-2026-80864 RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp
CVE-2026-80870 drm/amdkfd: Validate CRIU-restored IDs before idr_alloc
CVE-2026-80874 arm64: dts: renesas: ironhide: Describe inline ECC carveouts
CVE-2026-80873 KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions
CVE-2026-80872 ALSA: hda/tas2781: Cancel async firmware request at unbind
CVE-2026-80871 crypto: xilinx-trng - Remove crypto_rng interface
CVE-2026-80868 ntfs3: Allocate iomap inline_data using alloc_page
CVE-2026-80866 tipc: avoid busy looping in tipc_exit_net()
CVE-2026-80867 alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
CVE-2026-80855 fuse: fix invalidate lock leak on open O_TRUNC DAX failure
CVE-2026-80869 ntfs: bound the attribute-list entry in ntfs_read_inode_mount()

Showing top 20 of 156 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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