CVE-2023-53019: net: mdio: validate parameter addr in mdiobus_get_phy()
Vulnerability summary
CVE-2023-53019 is a high (CVSS 7.8) Improper Validation of Array Index vulnerability in linux. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 10.1% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 6 · Related 5Timeline
- 27-03-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: net: mdio: validate parameter addr in mdiobus_get_phy() The caller may pass any value as addr, what may result in an out-of-bounds access to array mdio_map. One existing case is stmmac_init_phy() that may pass -1 as addr. Therefore validate addr before using it.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.20%
Chance of exploitation in the next 30 days
Percentile
10%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.20% 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.
Ubuntu112 products
- linux< 4.15.0-209.220 | < 5.4.0-147.164 | < 5.15.0-70.77
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 4.15.0-1154.167 | < 5.4.0-1100.108 | < 5.15.0-1034.38
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 7f854420fbfe9d49afe2ffb1df052cfe8e215541, < 1d80c259dfbadefa61b7ea334dfce5cb57f8c72f | ≥ 7f854420fbfe9d49afe2ffb1df052cfe8e215541, < c431a3d642593bbdb99e8a9e3eed608b730db6f8 | ≥ 7f854420fbfe9d49afe2ffb1df052cfe8e215541, < 8a7b9560a3a8eb8724888c426e05926752f73aa0 | ≥ 7f854420fbfe9d49afe2ffb1df052cfe8e215541, < 4bc5f1f6bc94e695dfd912122af96e7115a0ddb8 | ≥ 7f854420fbfe9d49afe2ffb1df052cfe8e215541, < ad67de330d83e8078372b52af18ffe8d39e26c85 | ≥ 7f854420fbfe9d49afe2ffb1df052cfe8e215541, < 7879626296e6ffd838ae0f2af1ab49ee46354973 | ≥ 7f854420fbfe9d49afe2ffb1df052cfe8e215541, < 867dbe784c5010a466f00a7d1467c1c5ea569c75 | 4.5
- linux_kernel≥ 4.5, < 4.14.305 | ≥ 4.15, < 4.19.272 | ≥ 4.20, < 5.4.231 | ≥ 5.5, < 5.10.166 | ≥ 5.11, < 5.15.91 | ≥ 5.16, < 6.1.9 | 6.2:rc1 | 6.2:rc2 | 6.2:rc3 | 6.2:rc4
Debian1 product
- linux< 6.1.11-1
3 vendors · 115 products
