CVE-2025-40120: linux

CVSS: UnknownDeferred
AliasesUBUNTU-CVE-2025-40120DEBIAN-CVE-2025-40120
Published 12-11-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-40120 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 11.9% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.22%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 45 · Related 44
DLA-4379-1OPENSUSE-SU-2025:20172-1SUSE-SU-2025:4393-1SUSE-SU-2025:4422-1SUSE-SU-2025:4505-1SUSE-SU-2025:4516-1

Timeline

  1. 12-11-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

+0.02 pp

From 0.21% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.22%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu141 products
  • linux< 5.15.0-170.180 | < 6.8.0-106.106 | < 6.17.0-14.14
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1100.107 | < 6.8.0-1050.53 | < 6.17.0-1007.7
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.158-1 | < 6.12.57-1 | < 6.17.6-1
Linux1 product
  • linux≥ 4a2c7217cd5a87e85ceb761e307b030fe6db4805, < 71a0ba7fdaf8d035426912a4ed7bf1738a81010c | ≥ 4a2c7217cd5a87e85ceb761e307b030fe6db4805, < 3e96cd27ff1a004d84908c1b6cc68ac60913874e | ≥ 4a2c7217cd5a87e85ceb761e307b030fe6db4805, < 724a9db84188f80ef60b1f21cc7b4e9c84e0cb64 | ≥ 4a2c7217cd5a87e85ceb761e307b030fe6db4805, < 1534517300e12f2930b6ff477b8820ff658afd11 | ≥ 4a2c7217cd5a87e85ceb761e307b030fe6db4805, < 9d8bcaf6fae1bd82bc27ec09a2694497e6f6c4b4 | ≥ 4a2c7217cd5a87e85ceb761e307b030fe6db4805, < 3d3c4cd5c62f24bb3cb4511b7a95df707635e00a | 5.14

3 vendors · 143 products

References

39 links
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