CVE-2026-80768

HID: ft260: fix stack-use-after-return write in I2C read race

Published Sep 4, 2026 CVSS n/a EPSS < 1% KEV · Not listed

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`6a82582d9fa438045191074856f47165334f2777`	affected	< 2b907001e8a83cdb71e899fd3d77ab51e2c03f10
`6a82582d9fa438045191074856f47165334f2777`	affected	< 90e9298f2e4336a0e1ca7eeb173403df78056164
`6a82582d9fa438045191074856f47165334f2777`	affected	< 460514d46e8892189fc933a1b4433811cfa5c309
`6a82582d9fa438045191074856f47165334f2777`	affected	< 5aa5a1b7cc4b4bec5497ad9ef113fdfe37b232f3
`6a82582d9fa438045191074856f47165334f2777`	affected	< a8e1f970f9040294cfd9100c681c32af6c2aeec0
`6a82582d9fa438045191074856f47165334f2777`	affected	< d7ffbdc076675c84128d5b904e4d5167fe9f3a7f
`6a82582d9fa438045191074856f47165334f2777`	affected	< 77832d8f1c81d9f84b6b54807fb278586001d754
`6a82582d9fa438045191074856f47165334f2777`	affected	< bf3e39df3a397fd82967a31d17c4e02c7feab221

Linux

affected

Version	Status	Constraints
`5.13`	affected	—
`0`	unaffected	< 5.13
`5.15.220`	unaffected	≤ 5.15.*
`6.1.187`	unaffected	≤ 6.1.*
`6.6.156`	unaffected	≤ 6.6.*
`6.12.108`	unaffected	≤ 6.12.*
`6.18.49`	unaffected	≤ 6.18.*
`7.1.11`	unaffected	≤ 7.1.*
`7.2.1`	unaffected	≤ 7.2.*
`7.3`	unaffected	≤ *

No data.

Vendor Product Versions

Linux

Linux Kernel

Version	Status	Scheme	Platform
`[6a82582d9fa438045191074856f47165334f2777,2b907001e8a83cdb71e899fd3d77ab51e2c03f10)`	affected	code_commit	—
`[6a82582d9fa438045191074856f47165334f2777,90e9298f2e4336a0e1ca7eeb173403df78056164)`	affected	code_commit	—
`[6a82582d9fa438045191074856f47165334f2777,460514d46e8892189fc933a1b4433811cfa5c309)`	affected	code_commit	—
`[6a82582d9fa438045191074856f47165334f2777,5aa5a1b7cc4b4bec5497ad9ef113fdfe37b232f3)`	affected	code_commit	—
`[6a82582d9fa438045191074856f47165334f2777,a8e1f970f9040294cfd9100c681c32af6c2aeec0)`	affected	code_commit	—
`[6a82582d9fa438045191074856f47165334f2777,d7ffbdc076675c84128d5b904e4d5167fe9f3a7f)`	affected	code_commit	—
`[6a82582d9fa438045191074856f47165334f2777,77832d8f1c81d9f84b6b54807fb278586001d754)`	affected	code_commit	—
`[6a82582d9fa438045191074856f47165334f2777,bf3e39df3a397fd82967a31d17c4e02c7feab221)`	affected	code_commit	—

Linux

Linux Kernel

Version	Status	Scheme	Platform
`5.13`	affected	generic	—
`[0,5.13)`	unaffected	semver	—
`[5.15.220,5.15.*]`	unaffected	generic	—
`[6.1.187,6.1.*]`	unaffected	generic	—
`[6.6.156,6.6.*]`	unaffected	generic	—
`[6.12.108,6.12.*]`	unaffected	generic	—
`[6.18.49,6.18.*]`	unaffected	generic	—
`[7.1.11,7.1.*]`	unaffected	generic	—
`[7.2.1,7.2.*]`	unaffected	generic	—
`[7.3-rc1,*]`	unaffected	semver	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
Debian DLA	DLA-4777-1	linux security update
Debian DLA	DLA-4817-1	linux-6.12 security update
Debian DSA	DSA-6528-1	linux security update
Ubuntu USN	USN-8961-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9019-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-9020-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9022-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9023-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9024-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9025-1	Linux kernel vulnerabilities
Ubuntu USN	USN-9026-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-9029-1	Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN	USN-9039-1	Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN	USN-9040-1	Linux kernel (Low Latency NVIDIA) vulnerabilities
Ubuntu USN	USN-9066-1	Linux kernel (HWE) vulnerabilities
Ubuntu USN	USN-9091-1	Linux kernel (NVIDIA Tegra) vulnerabilities

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.177% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/2b907001e8a83cdb71e899fd3d77ab51e2c03f10
https://git.kernel.org/stable/c/460514d46e8892189fc933a1b4433811cfa5c309
https://git.kernel.org/stable/c/5aa5a1b7cc4b4bec5497ad9ef113fdfe37b232f3
https://git.kernel.org/stable/c/77832d8f1c81d9f84b6b54807fb278586001d754
https://git.kernel.org/stable/c/90e9298f2e4336a0e1ca7eeb173403df78056164
https://git.kernel.org/stable/c/a8e1f970f9040294cfd9100c681c32af6c2aeec0
https://git.kernel.org/stable/c/bf3e39df3a397fd82967a31d17c4e02c7feab221
https://git.kernel.org/stable/c/d7ffbdc076675c84128d5b904e4d5167fe9f3a7f

History

Sep 4, 2026 9:45 PM Weaknesses updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-416

Sep 4, 2026 3:30 PM Description updated. Title updated. First appearance in the feed. Affected versions updated. Affected vendors updated. Added references View changes

Type	Values Removed	Values Added
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.
Title		HID: ft260: fix stack-use-after-return write in I2C read race
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/2b907001e8a83cdb71e899fd3d77ab51e2c03f10 https://git.kernel.org/stable/c/460514d46e8892189fc933a1b4433811cfa5c309 https://git.kernel.org/stable/c/5aa5a1b7cc4b4bec5497ad9ef113fdfe37b232f3 https://git.kernel.org/stable/c/77832d8f1c81d9f84b6b54807fb278586001d754 https://git.kernel.org/stable/c/90e9298f2e4336a0e1ca7eeb173403df78056164 https://git.kernel.org/stable/c/a8e1f970f9040294cfd9100c681c32af6c2aeec0 https://git.kernel.org/stable/c/bf3e39df3a397fd82967a31d17c4e02c7feab221 https://git.kernel.org/stable/c/d7ffbdc076675c84128d5b904e4d5167fe9f3a7f