UBUNTU-CVE-2025-40120
In the Linux kernel, the following vulnerability has been resolved: net: usb: asix: hold PM usage ref to avoid PM/MDIO + RTNL deadlock Prevent USB runtime PM (autosuspend) for AX88772* in bind. usbnet enables runtime PM (autosuspend) by default, so disabling it via the usb_driver flag is ineffective. On AX88772B, autosuspend shows no measurable power saving with current driver (no link partner, admin up/down). The ~0.453 W -> ~0.248 W drop on v6.1 comes from phylib powering the PHY off on admin-down, not from USB autosuspend. The real hazard is that with runtime PM enabled, ndo_open() (under RTNL) may synchronously trigger autoresume (usb_autopm_get_interface()) into asix_resume() while the USB PM lock is held. Resume paths then invoke phylink/phylib and MDIO, which also expect RTNL, leading to possible deadlocks or PM lock vs MDIO wake issues. To avoid this, keep the device runtime-PM active by taking a usage reference in ax88772_bind() and dropping it in unbind(). A non-zero PM usage count blocks runtime suspend regardless of userspace policy (.../power/control - pm_runtime_allow/forbid), making this approach robust against sysfs overrides. Holding a runtime-PM usage ref does not affect system-wide suspend; system sleep/resume callbacks continue to run as before.
02 / AFFECTED SOFTWARE
Affected packages
11 explicit affected versions
78 explicit affected versions
50 explicit affected versions
6 explicit affected versions
12 explicit affected versions
19 explicit affected versions
10 explicit affected versions
6 explicit affected versions
88 explicit affected versions
24 explicit affected versions
73 explicit affected versions
73 explicit affected versions
79 explicit affected versions
68 explicit affected versions
10 explicit affected versions
30 explicit affected versions
26 explicit affected versions
80 explicit affected versions
7 explicit affected versions
77 explicit affected versions
34 explicit affected versions
13 explicit affected versions
37 explicit affected versions
35 explicit affected versions
40 explicit affected versions
38 explicit affected versions
18 explicit affected versions
35 explicit affected versions
64 explicit affected versions
39 explicit affected versions
13 explicit affected versions
4 explicit affected versions
23 explicit affected versions
45 explicit affected versions
1 explicit affected versions
21 explicit affected versions
9 explicit affected versions
16 explicit affected versions
10 explicit affected versions
12 explicit affected versions
41 explicit affected versions
8 explicit affected versions
7 explicit affected versions
12 explicit affected versions
11 explicit affected versions
7 explicit affected versions
12 explicit affected versions
14 explicit affected versions
10 explicit affected versions
1 explicit affected versions
7 explicit affected versions
9 explicit affected versions
12 explicit affected versions
1 explicit affected versions
12 explicit affected versions
34 explicit affected versions
34 explicit affected versions
16 explicit affected versions
9 explicit affected versions
23 explicit affected versions
27 explicit affected versions
10 explicit affected versions
37 explicit affected versions
10 explicit affected versions
1 explicit affected versions
13 explicit affected versions
33 explicit affected versions
3 explicit affected versions
10 explicit affected versions
11 explicit affected versions
55 explicit affected versions
26 explicit affected versions
5 explicit affected versions
13 explicit affected versions
27 explicit affected versions
29 explicit affected versions
13 explicit affected versions
12 explicit affected versions
85 explicit affected versions
34 explicit affected versions
34 explicit affected versions
80 explicit affected versions
43 explicit affected versions
33 explicit affected versions
23 explicit affected versions
49 explicit affected versions
10 explicit affected versions
13 explicit affected versions
12 explicit affected versions
11 explicit affected versions
5 explicit affected versions
12 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
8 explicit affected versions
5 explicit affected versions
65 explicit affected versions
81 explicit affected versions
10 explicit affected versions
26 explicit affected versions
32 explicit affected versions
1 explicit affected versions
57 explicit affected versions
28 explicit affected versions
40 explicit affected versions
11 explicit affected versions
1 explicit affected versions
13 explicit affected versions
39 explicit affected versions
16 explicit affected versions
79 explicit affected versions
43 explicit affected versions
3 explicit affected versions
7 explicit affected versions
2 explicit affected versions
7 explicit affected versions
51 explicit affected versions
8 explicit affected versions
18 explicit affected versions
35 explicit affected versions
12 explicit affected versions
66 explicit affected versions
68 explicit affected versions
1 explicit affected versions
27 explicit affected versions
54 explicit affected versions
36 explicit affected versions
8 explicit affected versions
45 explicit affected versions
5 explicit affected versions
8 explicit affected versions
10 explicit affected versions
7 explicit affected versions
39 explicit affected versions
13 explicit affected versions
13 explicit affected versions
7 explicit affected versions
8 explicit affected versions
10 explicit affected versions
12 explicit affected versions
9 explicit affected versions
28 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
45 explicit affected versions
37 explicit affected versions
44 explicit affected versions
14 explicit affected versions
38 explicit affected versions
9 explicit affected versions
9 explicit affected versions
11 explicit affected versions
32 explicit affected versions
15 explicit affected versions
6 explicit affected versions
81 explicit affected versions
8 explicit affected versions
7 explicit affected versions
4 explicit affected versions
70 explicit affected versions
1 explicit affected versions
1 explicit affected versions
1 explicit affected versions
79 explicit affected versions
70 explicit affected versions
69 explicit affected versions
13 explicit affected versions
43 explicit affected versions
6 explicit affected versions
10 explicit affected versions
8 explicit affected versions
38 explicit affected versions
14 explicit affected versions
4 explicit affected versions
78 explicit affected versions
6 explicit affected versions
11 explicit affected versions
1 explicit affected versions
12 explicit affected versions
32 explicit affected versions
69 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: net: usb: asix: hold PM usage ref to avoid PM/MDIO + RTNL deadlock Prevent USB runtime PM (autosuspend) for AX88772* in bind. usbnet enables runtime PM (autosuspend) by default, so disabling it via the usb_driver flag is ineffective. On AX88772B, autosuspend shows no measurable power saving with current driver (no link partner, admin up/down). The ~0.453 W -> ~0.248 W drop on v6.1 comes from phylib powering the PHY off on admin-down, not from USB autosuspend. The real hazard is that with runtime PM enabled, ndo_open() (under RTNL) may synchronously trigger autoresume (usb_autopm_get_interface()) into asix_resume() while the USB PM lock is held. Resume paths then invoke phylink/phylib and MDIO, which also expect RTNL, leading to possible deadlocks or PM lock vs MDIO wake issues. To avoid this, keep the device runtime-PM active by taking a usage reference in ax88772_bind() and dropping it in unbind(). A non-zero PM usage count blocks runtime suspend regardless of userspace policy (.../power/control - pm_runtime_allow/forbid), making this approach robust against sysfs overrides. Holding a runtime-PM usage ref does not affect system-wide suspend; system sleep/resume callbacks continue to run as before.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/3d3c4cd5c62f24bb3cb4511b7a95df707635e00a
- https://git.kernel.org/stable/c/1534517300e12f2930b6ff477b8820ff658afd11
- https://git.kernel.org/stable/c/3d3c4cd5c62f24bb3cb4511b7a95df707635e00a
- https://git.kernel.org/stable/c/3e96cd27ff1a004d84908c1b6cc68ac60913874e
- https://git.kernel.org/stable/c/71a0ba7fdaf8d035426912a4ed7bf1738a81010c
- https://git.kernel.org/stable/c/724a9db84188f80ef60b1f21cc7b4e9c84e0cb64
- https://git.kernel.org/stable/c/9d8bcaf6fae1bd82bc27ec09a2694497e6f6c4b4
- https://ubuntu.com/security/CVE-2025-40120
- https://ubuntu.com/security/notices/USN-8029-1
- https://ubuntu.com/security/notices/USN-8029-2
- https://ubuntu.com/security/notices/USN-8029-3
- https://ubuntu.com/security/notices/USN-8030-1
- https://ubuntu.com/security/notices/USN-8033-1
- https://ubuntu.com/security/notices/USN-8033-2
- https://ubuntu.com/security/notices/USN-8033-3
- https://ubuntu.com/security/notices/USN-8033-4
- https://ubuntu.com/security/notices/USN-8033-5
- https://ubuntu.com/security/notices/USN-8033-6
- https://ubuntu.com/security/notices/USN-8033-7
- https://ubuntu.com/security/notices/USN-8033-8
- https://ubuntu.com/security/notices/USN-8034-1
- https://ubuntu.com/security/notices/USN-8034-2
- https://ubuntu.com/security/notices/USN-8048-1
- https://ubuntu.com/security/notices/USN-8095-1
- https://ubuntu.com/security/notices/USN-8095-2
- https://ubuntu.com/security/notices/USN-8095-3
- https://ubuntu.com/security/notices/USN-8095-4
- https://ubuntu.com/security/notices/USN-8095-5
- https://ubuntu.com/security/notices/USN-8100-1
- https://ubuntu.com/security/notices/USN-8125-1
- https://ubuntu.com/security/notices/USN-8126-1
- https://ubuntu.com/security/notices/USN-8141-1
- https://ubuntu.com/security/notices/USN-8163-1
- https://ubuntu.com/security/notices/USN-8163-2
- https://ubuntu.com/security/notices/USN-8165-1
- https://ubuntu.com/security/notices/USN-8243-1
- https://ubuntu.com/security/notices/USN-8261-1
- https://www.cve.org/CVERecord?id=CVE-2025-40120