7.1

CVE-2025-38736: net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization

Modified
AliasesUBUNTU-CVE-2025-38736DEBIAN-CVE-2025-38736
Published 05-09-2025Last modified 15-10-2026

Vulnerability summary

CVE-2025-38736 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in debian debian_linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6.6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.1, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.1/10
010
High · v3.1 (NVD)
EPSS score
0.17%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 18 · Related 15
DLA-4328-1DSA-6008-1DSA-6009-1OPENSUSE-SU-2025:20081-1SUSE-SU-2025:03600-1SUSE-SU-2025:03634-1

Timeline

  1. 05-09-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: usb: asix_devices: Fix PHY address mask in MDIO bus initialization Syzbot reported shift-out-of-bounds exception on MDIO bus initialization. The PHY address should be masked to 5 bits (0-31). Without this mask, invalid PHY addresses could be used, potentially causing issues with MDIO bus operations. Fix this by masking the PHY address with 0x1f (31 decimal) to ensure it stays within the valid range.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.17% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu83 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Debian2 products
  • linux< 6.1.153-1 | < 6.12.48-1 | < 6.16.5-1
  • debian_linuxEOL11.0
Linux2 products
  • linux≥ 75947d3200de98a9ded9ad8972e02f1a177097fe, < fcb4ce9f729c1d08e53abf9d449340e24c3edee6 | ≥ 59ed6fbdb1bc03316e09493ffde7066f031c7524, < 8f141f2a4f2ef8ca865d5921574c3d6535e00a49 | ≥ ccef5ee4adf56472aa26bdd1f821a6d0cd06089a, < 748da80831221ae24b4bc8d7ffb22acd5712a341 | ≥ ee2cd40b0bb46056949a2319084a729d95389386, < 22042ffedd8c2c6db08ccdd6d4273068eddd3c5c | ≥ ad1f8313aeec0115f9978bd2d002ef4a8d96c773, < 523eab02fce458fa6d3c51de5bb055800986953e | ≥ 4faff70959d51078f9ee8372f8cff0d7045e4114, < 24ef2f53c07f273bad99173e27ee88d44d135b1c | a754ab53993b1585132e871c5d811167ad3c52ff | ≥ 6.15.11, < 6.16 | ≥ 6.12.43, < 6.12.44 | ≥ 6.16.2, < 6.16.4
  • linux_kernel≥ 6.15.11, < 6.16 | ≥ 6.16.2, < 6.16.4 | 6.12.43 | 6.17:rc2

3 vendors · 87 products

References

14 links
Show all 14 references