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CVE-2026-80802— nfc: fdp: bound the device-reported read length and fix an skb leak

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nfc fdp驱动中的fdp_nci_i2c_read()函数未验证设备提供的下一个数据包长度，可能导致栈越界写入、越界读取及skb内存泄漏。

AI Predicted 6.3 Difficulty: Moderate EPSS 0.24% · P14

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux a06347c04c13e380afce0c9816df51f00b83faf1< d9498ab9a78cb63d78dbe4f221d8cc6c91f285ee affected
a06347c04c13e380afce0c9816df51f00b83faf1< 1fc32327b927a6e2cde086f82575c29880844228 affected
a06347c04c13e380afce0c9816df51f00b83faf1< 8d2c243b79854628ff076c38748c020042f02f57 affected
a06347c04c13e380afce0c9816df51f00b83faf1< fc3c2bd5b1ec6c7cbc8a50e32d9bcec114f25463 affected
a06347c04c13e380afce0c9816df51f00b83faf1< 0d723090645b82c1cb27cfd7ebf81f0e7c96bcae affected
a06347c04c13e380afce0c9816df51f00b83faf1< db7e464b350969c6ea8340de00d9796e5fd5123b affected
a06347c04c13e380afce0c9816df51f00b83faf1< e5eec121f2c3bc4c7022613bedd9121a8aa4c949 affected
a06347c04c13e380afce0c9816df51f00b83faf1< 1aa3fc769b0c45bd19f8dab1697084c2b3f6d706 affected
… +12 more rows
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I. Basic Information for CVE-2026-80802

Vulnerability Information
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Vulnerability Title
nfc: fdp: bound the device-reported read length and fix an skb leak
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nfc: fdp: bound the device-reported read length and fix an skb leak fdp_nci_i2c_read() takes the next packet length from two device-supplied bytes and never validates it. The value is a u16 used as the i2c_master_recv() count into a 261-byte on-stack buffer: a malicious, counterfeit or malfunctioning controller (or an i2c bus interposer) can drive it far past the buffer for a stack out-of-bounds write that clobbers the canary and return address, or below the minimum frame size (directly, or by truncating the computed sum) so the header/LRC strip and the next length read run past a short receive. Reject a length outside [FDP_NCI_I2C_MIN_PAYLOAD, FDP_NCI_I2C_MAX_PAYLOAD], as a corrupted packet already is, and force resynchronization. The same loop allocates one data skb per iteration and assumes a length packet followed by a data packet; a device that sends two data packets in one call leaks the first skb when the second allocation overwrites it. Free a previously allocated skb before allocating the next.
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nfc fdp驱动中的fdp_nci_i2c_read()函数未验证设备提供的下一个数据包长度，可能导致栈越界写入、越界读取及skb内存泄漏。
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 a06347c04c13e380afce0c9816df51f00b83faf1 ~ d9498ab9a78cb63d78dbe4f221d8cc6c91f285ee -
Linux Linux 4.4 -

II. Public POCs for CVE-2026-80802

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III. Intelligence Information for CVE-2026-80802

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Patches & Fixes for CVE-2026-80802 (7)

Vendor Pages for CVE-2026-80802 (1)

Other References for CVE-2026-80802 (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

V. Comments for CVE-2026-80802

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