ghsa-wv6j-wrfj-57wc
Vulnerability from github
Published
2025-09-22 21:30
Modified
2025-09-22 21:30
Severity ?
VLAI Severity ?
Details
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)
{
"affected": [],
"aliases": [
"CVE-2022-49350"
],
"database_specific": {
"cwe_ids": [
"CWE-908"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-26T07:01:11Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mdio: unexport __init-annotated mdio_bus_init()\n\nEXPORT_SYMBOL and __init is a bad combination because the .init.text\nsection is freed up after the initialization. Hence, modules cannot\nuse symbols annotated __init. The access to a freed symbol may end up\nwith kernel panic.\n\nmodpost used to detect it, but it has been broken for a decade.\n\nRecently, I fixed modpost so it started to warn it again, then this\nshowed up in linux-next builds.\n\nThere are two ways to fix it:\n\n - Remove __init\n - Remove EXPORT_SYMBOL\n\nI chose the latter for this case because the only in-tree call-site,\ndrivers/net/phy/phy_device.c is never compiled as modular.\n(CONFIG_PHYLIB is boolean)",
"id": "GHSA-wv6j-wrfj-57wc",
"modified": "2025-09-22T21:30:17Z",
"published": "2025-09-22T21:30:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49350"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/35b42dce619701f1300fb8498dae82c9bb1f0263"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5534bcd7c40299862237c4a8fd9c5031b3db1538"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/59fa94cddf9eef8d8dae587373eed8b8f4eb11d7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6a90a44d53428a3bf01bd80df9ba78b19959270c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7759c3222815b945a94b212bc0c6cdec475cfec2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ab64ec2c75683f30ccde9eaaf0761002f901aa12"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f2f0f8c18b60ca64ff50892ed899cf1c77864755"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f5c68137f1191ba3fcf6260ec71b30be2e2bf4c3"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…