CVE-2025-38110 is an out-of-bounds memory-access vulnerability in the Linux kernel net/mdiobus subsystem’s Clause 45 (C45) MDIO read/write ioctl handling. The interface accepted an arbitrary MDIO address without validation, although the kernel supports 32 PHY addresses through PHY_MAX_ADDR. An address above the supported range could index the mdiobus statistics array out of bounds during a C45 read or write. The fix validates the MDIO address before performing the C45 operation.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A potential out-of-bounds Clause 45 read/write-access vulnerability in the Linux kernel mdiobus networking code, affecting Rocky Linux 9 kernel packages covered by CIQ advisory crlsa-2025_11861.
A Linux kernel MDIO bus subsystem flaw permitting potential out-of-bounds Clause 45 read or write access.
A Linux kernel net/mdiobus vulnerability involving potential out-of-bounds Clause 45 read/write access.
A potential out-of-bounds access vulnerability in Linux kernel net/mdiobus Clause 45 read/write handling, addressed by the Red Hat Enterprise Linux 10 kernel update.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.