CVE-2025-38725: net: usb: asix_devices: add phy_mask for ax88772 mdio bus
Vulnerability summary
CVE-2025-38725 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in debian debian_linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 4.9% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 44 · Related 40Timeline
- 04-09-2025PublishedVulnerability first disclosed.
- 15-10-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: net: usb: asix_devices: add phy_mask for ax88772 mdio bus Without setting phy_mask for ax88772 mdio bus, current driver may create at most 32 mdio phy devices with phy address range from 0x00 ~ 0x1f. DLink DUB-E100 H/W Ver B1 is such a device. However, only one main phy device will bind to net phy driver. This is creating issue during system suspend/resume since phy_polling_mode() in phy_state_machine() will directly deference member of phydev->drv for non-main phy devices. Then NULL pointer dereference issue will occur. Due to only external phy or internal phy is necessary, add phy_mask for ax88772 mdio bus to workarnoud the issue.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.16%
Chance of exploitation in the next 30 days
Percentile
5%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.16% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu136 products
- linux< 5.15.0-163.173 | < 6.8.0-100.100
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.15.0-1097.104 | < 6.8.0-1046.49
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian2 products
- linux< 6.1.153-1 | < 6.12.43-1 | < 6.16.3-1
- debian_linuxEOL11.0
Linux2 products
- linux≥ e532a096be0e5e570b383e71d4560e7f04384e0f, < 75947d3200de98a9ded9ad8972e02f1a177097fe | ≥ e532a096be0e5e570b383e71d4560e7f04384e0f, < 59ed6fbdb1bc03316e09493ffde7066f031c7524 | ≥ e532a096be0e5e570b383e71d4560e7f04384e0f, < ccef5ee4adf56472aa26bdd1f821a6d0cd06089a | ≥ e532a096be0e5e570b383e71d4560e7f04384e0f, < ee2cd40b0bb46056949a2319084a729d95389386 | ≥ e532a096be0e5e570b383e71d4560e7f04384e0f, < a754ab53993b1585132e871c5d811167ad3c52ff | ≥ e532a096be0e5e570b383e71d4560e7f04384e0f, < ad1f8313aeec0115f9978bd2d002ef4a8d96c773 | ≥ e532a096be0e5e570b383e71d4560e7f04384e0f, < 4faff70959d51078f9ee8372f8cff0d7045e4114 | 5.14
- linux_kernel≥ 5.14, < 5.15.190 | ≥ 5.16, < 6.1.149 | ≥ 6.2, < 6.6.103 | ≥ 6.7, < 6.12.43 | ≥ 6.13, < 6.15.11 | ≥ 6.16, < 6.16.2 | 6.17:rc1
3 vendors · 140 products
