ghsa-q2w7-x8j6-5gxc
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
net/smc: fix connection leak
There's a potential leak issue under following execution sequence :
smc_release smc_connect_work if (sk->sk_state == SMC_INIT) send_clc_confirim tcp_abort(); ... sk.sk_state = SMC_ACTIVE smc_close_active switch(sk->sk_state) { ... case SMC_ACTIVE: smc_close_final() // then wait peer closed
Unfortunately, tcp_abort() may discard CLC CONFIRM messages that are still in the tcp send buffer, in which case our connection token cannot be delivered to the server side, which means that we cannot get a passive close message at all. Therefore, it is impossible for the to be disconnected at all.
This patch tries a very simple way to avoid this issue, once the state has changed to SMC_ACTIVE after tcp_abort(), we can actively abort the smc connection, considering that the state is SMC_INIT before tcp_abort(), abandoning the complete disconnection process should not cause too much problem.
In fact, this problem may exist as long as the CLC CONFIRM message is not received by the server. Whether a timer should be added after smc_close_final() needs to be discussed in the future. But even so, this patch provides a faster release for connection in above case, it should also be valuable.
{
"affected": [],
"aliases": [
"CVE-2022-48909"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-08-22T02:15:05Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix connection leak\n\nThere\u0027s a potential leak issue under following execution sequence :\n\nsmc_release \t\t\t\tsmc_connect_work\nif (sk-\u003esk_state == SMC_INIT)\n\t\t\t\t\tsend_clc_confirim\n\ttcp_abort();\n\t\t\t\t\t...\n\t\t\t\t\tsk.sk_state = SMC_ACTIVE\nsmc_close_active\nswitch(sk-\u003esk_state) {\n...\ncase SMC_ACTIVE:\n\tsmc_close_final()\n\t// then wait peer closed\n\nUnfortunately, tcp_abort() may discard CLC CONFIRM messages that are\nstill in the tcp send buffer, in which case our connection token cannot\nbe delivered to the server side, which means that we cannot get a\npassive close message at all. Therefore, it is impossible for the to be\ndisconnected at all.\n\nThis patch tries a very simple way to avoid this issue, once the state\nhas changed to SMC_ACTIVE after tcp_abort(), we can actively abort the\nsmc connection, considering that the state is SMC_INIT before\ntcp_abort(), abandoning the complete disconnection process should not\ncause too much problem.\n\nIn fact, this problem may exist as long as the CLC CONFIRM message is\nnot received by the server. Whether a timer should be added after\nsmc_close_final() needs to be discussed in the future. But even so, this\npatch provides a faster release for connection in above case, it should\nalso be valuable.",
"id": "GHSA-q2w7-x8j6-5gxc",
"modified": "2024-09-12T15:32:59Z",
"published": "2024-08-22T03:31:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48909"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2e8d465b83db307f04ad265848f8ab3f78f6918f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/80895b6f9154fb22d36fab311ccbb75503a2c87b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9f1c50cf39167ff71dc5953a3234f3f6eeb8fcb5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e98d46ccfa84b35a9e4b1ccdd83961b41a5d7ce5"
}
],
"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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- 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.