CVE-2025-39876: net: fec: Fix possible NPD in fec_enet_phy_reset_after_clk_enable()
Vulnerability summary
CVE-2025-39876 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in debian debian_linux. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 4.4% 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
- 23-09-2025PublishedVulnerability first disclosed.
- 23-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: net: fec: Fix possible NPD in fec_enet_phy_reset_after_clk_enable() The function of_phy_find_device may return NULL, so we need to take care before dereferencing phy_dev.
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
0.15%
Chance of exploitation in the next 30 days
Percentile
4%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.15% 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.
Ubuntu144 products
- linuxAll versions (No fix recorded) | < 5.15.0-170.180 | < 6.8.0-106.106
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1100.107 | < 6.8.0-1050.53
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian2 products
- linux< 6.1.153-1 | < 6.12.48-1 | < 6.16.8-1
- debian_linuxEOL11.0
Linux2 products
- linux≥ 9e70485b40c8306298adea8bdc867ca27f88955a, < 8c60d12bba14dc655d2d948b1dbf390b3ae39cb8 | ≥ 64a632da538a6827fad0ea461925cedb9899ebe2, < 20a3433d31c2d2bf70ab0abec75f3136b42ae66c | ≥ 64a632da538a6827fad0ea461925cedb9899ebe2, < 93a699d6e92cfdfa9eb9dbb8c653b5322542ca4f | ≥ 64a632da538a6827fad0ea461925cedb9899ebe2, < 5f1bb554a131e59b28482abad21f691390651752 | ≥ 64a632da538a6827fad0ea461925cedb9899ebe2, < fe78891f296ac05bf4e5295c9829ef822f3c32e7 | ≥ 64a632da538a6827fad0ea461925cedb9899ebe2, < 4fe53aaa4271a72fe5fe3e88a45ce01646b68dc5 | ≥ 64a632da538a6827fad0ea461925cedb9899ebe2, < eb148d85e126c47d65be34f2a465d69432ca5541 | ≥ 64a632da538a6827fad0ea461925cedb9899ebe2, < 03e79de4608bdd48ad6eec272e196124cefaf798 | c068e505f229ca5f778f825f1401817ce818e917 | 8a6ab151443cd71e2aa5e8b7014e3453dbd51935 | ce88b5f42868ef4964c497d4dfcd25e88fd60c5b | ≥ 5.4.73, < 5.4.300 | ≥ 4.19.153, < 4.20 | ≥ 5.8.17, < 5.9 | ≥ 5.9.2, < 5.10 | 5.10
- linux_kernel≥ 4.19.153, < 4.20 | ≥ 5.4.73, < 5.4.300 | ≥ 5.8.17, < 5.9 | ≥ 5.9.2, < 5.10.245 | ≥ 5.11, < 5.15.194 | ≥ 5.16, < 6.1.153 | ≥ 6.2, < 6.6.107 | ≥ 6.7, < 6.12.48 | ≥ 6.13, < 6.16.8 | 6.17:rc1 | 6.17:rc2 | 6.17:rc3 | 6.17:rc4 | 6.17:rc5
3 vendors · 148 products
