ghsa-97f5-6j52-rp35
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
mptcp: fix race on unaccepted mptcp sockets
When the listener socket owning the relevant request is closed, it frees the unaccepted subflows and that causes later deletion of the paired MPTCP sockets.
The mptcp socket's worker can run in the time interval between such delete operations. When that happens, any access to msk->first will cause an UaF access, as the subflow cleanup did not cleared such field in the mptcp socket.
Address the issue explicitly traversing the listener socket accept queue at close time and performing the needed cleanup on the pending msk.
Note that the locking is a bit tricky, as we need to acquire the msk socket lock, while still owning the subflow socket one.
{
"affected": [],
"aliases": [
"CVE-2022-49669"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-26T07:01:41Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: fix race on unaccepted mptcp sockets\n\nWhen the listener socket owning the relevant request is closed,\nit frees the unaccepted subflows and that causes later deletion\nof the paired MPTCP sockets.\n\nThe mptcp socket\u0027s worker can run in the time interval between such delete\noperations. When that happens, any access to msk-\u003efirst will cause an UaF\naccess, as the subflow cleanup did not cleared such field in the mptcp\nsocket.\n\nAddress the issue explicitly traversing the listener socket accept\nqueue at close time and performing the needed cleanup on the pending\nmsk.\n\nNote that the locking is a bit tricky, as we need to acquire the msk\nsocket lock, while still owning the subflow socket one.",
"id": "GHSA-97f5-6j52-rp35",
"modified": "2025-02-27T18:31:09Z",
"published": "2025-02-27T18:31:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49669"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6aeed9045071f2252ff4e98fc13d1e304f33e5b0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a8a3e95c74e48c2c9b07b81fafda9122993f2e12"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- 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.