ghsa-9hmv-44qw-gg32
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: xfrm: unexport __init-annotated xfrm4_protocol_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, net/ipv4/xfrm4_policy.c is never compiled as modular. (CONFIG_XFRM is boolean)
{
"affected": [],
"aliases": [
"CVE-2022-49345"
],
"database_specific": {
"cwe_ids": [],
"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: xfrm: unexport __init-annotated xfrm4_protocol_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,\nnet/ipv4/xfrm4_policy.c is never compiled as modular.\n(CONFIG_XFRM is boolean)",
"id": "GHSA-9hmv-44qw-gg32",
"modified": "2025-09-22T21:30:16Z",
"published": "2025-09-22T21:30:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49345"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2b253fbc9f7b5db18d716436bdcf8ecef09fd63d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/31f3c6a4dcd3260a386e62cef2d5b36e902600a1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4a388f08d8784af48f352193d2b72aaf167a57a1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/85a055c03691e51499123194a14a0c249cf33227"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/be3884d5cd04ccd58294b83a02d70b7c5fca19d3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c58d82a1264813e69119c13e9804e2e60b664ad5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e04d59cfe0c0129df7aba7ef7bb17b96be2a64f2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e53cd3814504b2cadaba4d5a8a07eeea9ddacd03"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ef6d2354de238b065d8799c80da4be9a6af18e39"
}
],
"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"
}
]
}
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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.
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