ghsa-96rq-8hwj-wwwm
Vulnerability from github
Published
2024-05-19 09:34
Modified
2024-05-19 09:34
Details
In the Linux kernel, the following vulnerability has been resolved:
SUNRPC: Fix a slow server-side memory leak with RPC-over-TCP
Jan Schunk reports that his small NFS servers suffer from memory exhaustion after just a few days. A bisect shows that commit e18e157bb5c8 ("SUNRPC: Send RPC message on TCP with a single sock_sendmsg() call") is the first bad commit.
That commit assumed that sock_sendmsg() releases all the pages in the underlying bio_vec array, but the reality is that it doesn't. svc_xprt_release() releases the rqst's response pages, but the record marker page fragment isn't one of those, so it is never released.
This is a narrow fix that can be applied to stable kernels. A more extensive fix is in the works.
{
"affected": [],
"aliases": [
"CVE-2024-35882"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-19T09:15:09Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: Fix a slow server-side memory leak with RPC-over-TCP\n\nJan Schunk reports that his small NFS servers suffer from memory\nexhaustion after just a few days. A bisect shows that commit\ne18e157bb5c8 (\"SUNRPC: Send RPC message on TCP with a single\nsock_sendmsg() call\") is the first bad commit.\n\nThat commit assumed that sock_sendmsg() releases all the pages in\nthe underlying bio_vec array, but the reality is that it doesn\u0027t.\nsvc_xprt_release() releases the rqst\u0027s response pages, but the\nrecord marker page fragment isn\u0027t one of those, so it is never\nreleased.\n\nThis is a narrow fix that can be applied to stable kernels. A\nmore extensive fix is in the works.",
"id": "GHSA-96rq-8hwj-wwwm",
"modified": "2024-05-19T09:34:46Z",
"published": "2024-05-19T09:34:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-35882"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/05258a0a69b3c5d2c003f818702c0a52b6fea861"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1ba1291172f935e6b6fe703161a948f3347400b8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a2ebedf7bcd17a1194a0a18122c885eb578ee882"
}
],
"schema_version": "1.4.0",
"severity": []
}
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