CVE-2022-49350: net: mdio: unexport __init-annotated mdio_bus_init()
Vulnerability summary
CVE-2022-49350 is a medium (CVSS 5.5) Use of Uninitialized Resource vulnerability in linux. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 21% 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 5 · Related 4Timeline
- 26-02-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: net: mdio: unexport __init-annotated mdio_bus_init() EXPORT_SYMBOL and __init is a bad combination because the .init.text section is freed up after the initialization. Hence, modules cannot use symbols annotated __init. The access to a freed symbol may end up with kernel panic. modpost used to detect it, but it has been broken for a decade. Recently, I fixed modpost so it started to warn it again, then this showed up in linux-next builds. There are two ways to fix it: - Remove __init - Remove EXPORT_SYMBOL I chose the latter for this case because the only in-tree call-site, drivers/net/phy/phy_device.c is never compiled as modular. (CONFIG_PHYLIB is boolean)
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
0.28%
Chance of exploitation in the next 30 days
Percentile
21%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.28% 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.
Ubuntu110 products
- linux< 4.15.0-192.203 | < 5.4.0-126.142 | < 5.15.0-48.54
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 4.15.0-1140.151 | < 5.4.0-1085.92 | < 5.15.0-1020.24
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 90eff9096c01ba90cdae504a6b95ee87fe2556a3, < ab64ec2c75683f30ccde9eaaf0761002f901aa12 | ≥ 90eff9096c01ba90cdae504a6b95ee87fe2556a3, < 5534bcd7c40299862237c4a8fd9c5031b3db1538 | ≥ 90eff9096c01ba90cdae504a6b95ee87fe2556a3, < 6a90a44d53428a3bf01bd80df9ba78b19959270c | ≥ 90eff9096c01ba90cdae504a6b95ee87fe2556a3, < 7759c3222815b945a94b212bc0c6cdec475cfec2 | ≥ 90eff9096c01ba90cdae504a6b95ee87fe2556a3, < 59fa94cddf9eef8d8dae587373eed8b8f4eb11d7 | ≥ 90eff9096c01ba90cdae504a6b95ee87fe2556a3, < f5c68137f1191ba3fcf6260ec71b30be2e2bf4c3 | ≥ 90eff9096c01ba90cdae504a6b95ee87fe2556a3, < f2f0f8c18b60ca64ff50892ed899cf1c77864755 | ≥ 90eff9096c01ba90cdae504a6b95ee87fe2556a3, < 35b42dce619701f1300fb8498dae82c9bb1f0263 | 4.12
- linux_kernel≥ 4.12, < 4.14.283 | ≥ 4.15, < 4.19.247 | ≥ 4.20, < 5.4.198 | ≥ 5.5, < 5.10.122 | ≥ 5.11, < 5.15.47 | ≥ 5.16, < 5.17.15 | ≥ 5.18, < 5.18.4 | 5.19:rc1
Debian1 product
- linux< 5.18.5-1
3 vendors · 113 products
