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CVE-2026-80768— HID: ft260: fix stack-use-after-return write in I2C read race

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 5.13版本存在安全漏洞，该漏洞源于HID ft260驱动中ft260_i2c_read()函数与ft260_raw_event()回调并发访问read_buf缓冲区且缺少同步机制，导致栈释放后返回写入，恶意或故障硬件可能触发将设备数据复制到已释放的栈位置。

AI Predicted 7.8 Difficulty: Hard EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1204.001 · Malicious Link

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 6a82582d9fa438045191074856f47165334f2777< 2b907001e8a83cdb71e899fd3d77ab51e2c03f10 affected
6a82582d9fa438045191074856f47165334f2777< 90e9298f2e4336a0e1ca7eeb173403df78056164 affected
6a82582d9fa438045191074856f47165334f2777< 460514d46e8892189fc933a1b4433811cfa5c309 affected
6a82582d9fa438045191074856f47165334f2777< 5aa5a1b7cc4b4bec5497ad9ef113fdfe37b232f3 affected
6a82582d9fa438045191074856f47165334f2777< a8e1f970f9040294cfd9100c681c32af6c2aeec0 affected
6a82582d9fa438045191074856f47165334f2777< d7ffbdc076675c84128d5b904e4d5167fe9f3a7f affected
6a82582d9fa438045191074856f47165334f2777< 77832d8f1c81d9f84b6b54807fb278586001d754 affected
6a82582d9fa438045191074856f47165334f2777< bf3e39df3a397fd82967a31d17c4e02c7feab221 affected
… +10 more rows
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I. Basic Information for CVE-2026-80768

Vulnerability Information
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Vulnerability Title
HID: ft260: fix stack-use-after-return write in I2C read race
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: HID: ft260: fix stack-use-after-return write in I2C read race ft260_i2c_read() points dev->read_buf at a caller-supplied buffer (often an on-stack variable), arms a completion and waits up to five seconds for the device to return the data. The HID input callback ft260_raw_event() runs in the input/IRQ path, independent of the dev->lock mutex held by the read path, and copies the device-supplied payload into dev->read_buf after a plain NULL check. These two paths share read_buf, read_idx and read_len with no serialization. If the device delays its response until the read times out, ft260_i2c_read() resets the controller, clears read_buf and returns, unwinding the stack frame the buffer lived in. A response that arrives at that moment lets ft260_raw_event() pass the NULL check and then memcpy() the device-controlled payload into the now-freed stack location, a bounded but attacker-influenced stack-use-after-return write triggerable by malicious or malfunctioning hardware. Add a dedicated spinlock that serializes every access to read_buf, read_idx and read_len. ft260_raw_event() now holds it across the NULL check, the memcpy and the index update, while the read path takes it when arming and when clearing the buffer, so the teardown can no longer slip between the check and the copy.
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 5.13版本存在安全漏洞，该漏洞源于HID ft260驱动中ft260_i2c_read()函数与ft260_raw_event()回调并发访问read_buf缓冲区且缺少同步机制，导致栈释放后返回写入，恶意或故障硬件可能触发将设备数据复制到已释放的栈位置。
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 6a82582d9fa438045191074856f47165334f2777 ~ 2b907001e8a83cdb71e899fd3d77ab51e2c03f10 -
Linux Linux 5.13 -

II. Public POCs for CVE-2026-80768

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III. Intelligence Information for CVE-2026-80768

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Patches & Fixes for CVE-2026-80768 (7)

Other References for CVE-2026-80768 (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-2026-80768

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