UBUNTU-CVE-2025-21746
In 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.
02 / AFFECTED SOFTWARE
Affected packages
28 explicit affected versions
27 explicit affected versions
29 explicit affected versions
10 explicit affected versions
11 explicit affected versions
1 explicit affected versions
24 explicit affected versions
26 explicit affected versions
7 explicit affected versions
26 explicit affected versions
4 explicit affected versions
37 explicit affected versions
10 explicit affected versions
10 explicit affected versions
13 explicit affected versions
13 explicit affected versions
78 explicit affected versions
25 explicit affected versions
45 explicit affected versions
37 explicit affected versions
8 explicit affected versions
4 explicit affected versions
8 explicit affected versions
19 explicit affected versions
33 explicit affected versions
24 explicit affected versions
23 explicit affected versions
7 explicit affected versions
10 explicit affected versions
3 explicit affected versions
33 explicit affected versions
16 explicit affected versions
13 explicit affected versions
12 explicit affected versions
19 explicit affected versions
38 explicit affected versions
51 explicit affected versions
13 explicit affected versions
10 explicit affected versions
23 explicit affected versions
13 explicit affected versions
10 explicit affected versions
21 explicit affected versions
13 explicit affected versions
16 explicit affected versions
22 explicit affected versions
28 explicit affected versions
1 explicit affected versions
10 explicit affected versions
10 explicit affected versions
21 explicit affected versions
1 explicit affected versions
8 explicit affected versions
13 explicit affected versions
21 explicit affected versions
24 explicit affected versions
6 explicit affected versions
13 explicit affected versions
12 explicit affected versions
7 explicit affected versions
14 explicit affected versions
18 explicit affected versions
12 explicit affected versions
26 explicit affected versions
25 explicit affected versions
1 explicit affected versions
28 explicit affected versions
3 explicit affected versions
29 explicit affected versions
23 explicit affected versions
14 explicit affected versions
5 explicit affected versions
5 explicit affected versions
3 explicit affected versions
3 explicit affected versions
26 explicit affected versions
12 explicit affected versions
44 explicit affected versions
15 explicit affected versions
4 explicit affected versions
4 explicit affected versions
4 explicit affected versions
16 explicit affected versions
9 explicit affected versions
23 explicit affected versions
12 explicit affected versions
4 explicit affected versions
7 explicit affected versions
13 explicit affected versions
7 explicit affected versions
31 explicit affected versions
23 explicit affected versions
5 explicit affected versions
13 explicit affected versions
32 explicit affected versions
7 explicit affected versions
10 explicit affected versions
14 explicit affected versions
18 explicit affected versions
3 explicit affected versions
16 explicit affected versions
43 explicit affected versions
11 explicit affected versions
35 explicit affected versions
12 explicit affected versions
13 explicit affected versions
21 explicit affected versions
6 explicit affected versions
12 explicit affected versions
1 explicit affected versions
50 explicit affected versions
11 explicit affected versions
12 explicit affected versions
26 explicit affected versions
27 explicit affected versions
12 explicit affected versions
7 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In 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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/08bd5b7c9a2401faabdaa1472d45c7de0755fd7e
- https://git.kernel.org/stable/c/08bd5b7c9a2401faabdaa1472d45c7de0755fd7e
- https://git.kernel.org/stable/c/3e179d3f1ada963475395d81bfe91daef4d1a24c
- https://git.kernel.org/stable/c/87da1ea93ec9f9f0004e5b12e78789bc94e360bf
- https://git.kernel.org/stable/c/a2cbcd70133dc0d4d4c95ad4cd5412b935354c7c
- https://ubuntu.com/security/CVE-2025-21746
- https://ubuntu.com/security/notices/USN-7521-1
- https://ubuntu.com/security/notices/USN-7521-2
- https://ubuntu.com/security/notices/USN-7521-3
- https://ubuntu.com/security/notices/USN-7703-1
- https://ubuntu.com/security/notices/USN-7703-2
- https://ubuntu.com/security/notices/USN-7703-3
- https://ubuntu.com/security/notices/USN-7703-4
- https://ubuntu.com/security/notices/USN-7719-1
- https://ubuntu.com/security/notices/USN-7737-1
- https://www.cve.org/CVERecord?id=CVE-2025-21746