linux — security advisory
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.
- Products
- linux
- Affected versions
- Not specified
- Fixed versions
- 5.18.14-1
- CVEs
- CVE-2022-49669
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 14:54 UTC · Revision 1
Source evidence
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.
osv:DEBIAN-CVE-2022-49669
linux
Fixed versions: 5.18.14-1
linux
Fixed versions: 5.18.14-1
linux
Fixed versions: 5.18.14-1
Complete source record
{
"id": "a97571841ce1b1b8d22c9a921b0000ac7f4542037f991e9f2b525fa7a63d86c7",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2022-49669",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2022-49669",
"summary": "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.",
"evidence": "osv:DEBIAN-CVE-2022-49669",
"products": [
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},
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{
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"severity": "high",
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"ecosystem": "Debian:12"
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"database_specific": {
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{
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{
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"database_specific": {
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},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-15T08:02:36.086406674Z",
"provider": "osv",
"upstream": [
"CVE-2022-49669"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2022-49669"
]
},
"related_cves": [
{
"value": "CVE-2022-49669",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 323706,
"published_at": "2025-02-26T07:01:41.87+00:00"
}