Input: synaptics - fix crash when enabling pass-through port

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-21746
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-02-27 03:15:15 UTC
Updated2026-04-06 13:38:09 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: Input: synaptics - fix crash when enabling pass-through port When enabling a pass-through port an interrupt might come before psmouse driver binds to the pass-through port. However synaptics sub-driver tries to access psmouse instance presumably associated with the pass-through port to figure out if only 1 byte of response or entire protocol packet needs to be forwarded to the pass-through port and may crash if psmouse instance has not been attached to the port yet. Fix the crash by introducing open() and close() methods for the port and check if the port is open before trying to access psmouse instance. Because psmouse calls serio_open() only after attaching psmouse instance to serio port instance this prevents the potential crash.

Risk And Classification

Primary CVSS: v3.1 4.7 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-367

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 100e16959c3ca8cb7be788ed3e2c5867481f35f6 a2cbcd70133dc0d4d4c95ad4cd5412b935354c7c git Not specified
CNA Linux Linux affected 100e16959c3ca8cb7be788ed3e2c5867481f35f6 3e179d3f1ada963475395d81bfe91daef4d1a24c git Not specified
CNA Linux Linux affected 100e16959c3ca8cb7be788ed3e2c5867481f35f6 87da1ea93ec9f9f0004e5b12e78789bc94e360bf git Not specified
CNA Linux Linux affected 100e16959c3ca8cb7be788ed3e2c5867481f35f6 08bd5b7c9a2401faabdaa1472d45c7de0755fd7e git Not specified
CNA Linux Linux affected 6.5 Not specified
CNA Linux Linux unaffected 6.5 semver Not specified
CNA Linux Linux unaffected 6.6.80 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.17 6.12.* semver Not specified
CNA Linux Linux unaffected 6.13.3 6.13.* semver Not specified
CNA Linux Linux unaffected 6.14 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/87da1ea93ec9f9f0004e5b12e78789bc94e360bf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a2cbcd70133dc0d4d4c95ad4cd5412b935354c7c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/08bd5b7c9a2401faabdaa1472d45c7de0755fd7e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3e179d3f1ada963475395d81bfe91daef4d1a24c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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