CVE-2026-80677

driver core: use READ_ONCE() for dev->driver in dev_has_sync_state()

State: Published
Severity: 7.8 High
Published: Aug 28, 2026
Updated: Oct 16, 2026
Reserved: Aug 26, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

driver core: use READ_ONCE() for dev->driver in dev_has_sync_state()

dev_has_sync_state() reads dev->driver twice without holding device_lock() -- once for the NULL check and once to dereference ->sync_state. Some callers only hold device_links_write_lock, which doesn't prevent a concurrent unbind from clearing dev->driver via device_unbind_cleanup().

Fix it by reading dev->driver exactly once with READ_ONCE(), pairing with the WRITE_ONCE() in device_set_driver().

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	ac338acf514e7b578fa9e3742ec2c292323b4c1a to before 89789e4c141904506163dcb91c7289a074573931Affected ac338acf514e7b578fa9e3742ec2c292323b4c1a to before 51b3e1de53ee5b7775c7ff90e67fdb2665fce938Affected ac338acf514e7b578fa9e3742ec2c292323b4c1a to before 358697929351f619143f59c6a8a15a4994748b79Affected ac338acf514e7b578fa9e3742ec2c292323b4c1a to before 5e79e0180515b31b2e2244dc3d256fd8b5a07021Affected ac338acf514e7b578fa9e3742ec2c292323b4c1a to before 860885fcd2611bca8c28dac8b2c1c7ff160f763eAffected ac338acf514e7b578fa9e3742ec2c292323b4c1a to before cc77f0d91e3214e4292208f02a1dc09a31f9aac7Affected ac338acf514e7b578fa9e3742ec2c292323b4c1a to before 9b0f4082a09760939588135d60a8e9cc994bfa3eAffected ac338acf514e7b578fa9e3742ec2c292323b4c1a to before e9506871a8ea304cde48ff4a57226df2aadddae3Affected 6d88283a49425eb469aa60ffebe76539e73c933eAffected 5.5.13 to before 5.6Affected
LinuxLinux	5.6Affected before 5.6Not affected 5.10.261 through 5.10.Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.97 through 6.12.Not affected 6.18.40 through 6.18.Not affected 7.1.5 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

ac338acf514e7b578fa9e3742ec2c292323b4c1a to before 89789e4c141904506163dcb91c7289a074573931Affected
ac338acf514e7b578fa9e3742ec2c292323b4c1a to before 51b3e1de53ee5b7775c7ff90e67fdb2665fce938Affected
ac338acf514e7b578fa9e3742ec2c292323b4c1a to before 358697929351f619143f59c6a8a15a4994748b79Affected
ac338acf514e7b578fa9e3742ec2c292323b4c1a to before 5e79e0180515b31b2e2244dc3d256fd8b5a07021Affected
ac338acf514e7b578fa9e3742ec2c292323b4c1a to before 860885fcd2611bca8c28dac8b2c1c7ff160f763eAffected
ac338acf514e7b578fa9e3742ec2c292323b4c1a to before cc77f0d91e3214e4292208f02a1dc09a31f9aac7Affected
ac338acf514e7b578fa9e3742ec2c292323b4c1a to before 9b0f4082a09760939588135d60a8e9cc994bfa3eAffected
ac338acf514e7b578fa9e3742ec2c292323b4c1a to before e9506871a8ea304cde48ff4a57226df2aadddae3Affected
6d88283a49425eb469aa60ffebe76539e73c933eAffected
5.5.13 to before 5.6Affected

LinuxLinux

5.6Affected
before 5.6Not affected
5.10.261 through 5.10.*Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.97 through 6.12.*Not affected
6.18.40 through 6.18.*Not affected
7.1.5 through 7.1.*Not affected
7.2 and laterNot affected

References

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