SUNRPC: double free xprt_ctxt while still in use
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: double free xprt_ctxt while still in use When an RPC request is deferred, the rq_xprt_ctxt pointer is moved out of the svc_rqst into the svc_deferred_req. When the deferred request is revisited, the pointer is copied into the new svc_rqst - and also remains in the svc_deferred_req. In the (rare?) case that the request is deferred a second time, the old svc_deferred_req is reused - it still has all the correct content. However in that case the rq_xprt_ctxt pointer is NOT cleared so that when xpo_release_xprt is called, the ctxt is freed (UDP) or possible added to a free list (RDMA). When the deferred request is revisited for a second time, it will reference this ctxt which may be invalid, and the free the object a second time which is likely to oops. So change svc_defer() to *always* clear rq_xprt_ctxt, and assert that the value is now stored in the svc_deferred_req.
CVE-2023-54269
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2023-54269
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "f5e13d700a4d40ccde3d36e383f9247dcb3c1d2d",
"lessThan": "7851771789e87108a92697194105ef0c9307dc5e",
"versionType": "git"
},
{
"status": "affected",
"version": "773f91b2cf3f52df0d7508fdbf60f37567cdaee4",
"lessThan": "fd86534872f445f54dc01e7db001e25eadf063a8",
"versionType": "git"
},
{
"status": "affected",
"version": "773f91b2cf3f52df0d7508fdbf60f37567cdaee4",
"lessThan": "e0c648627322a4c7e018e5c7f837c3c03e297dbb",
"versionType": "git"
},
{
"status": "affected",
"version": "773f91b2cf3f52df0d7508fdbf60f37567cdaee4",
"lessThan": "eb8d3a2c809abd73ab0a060fe971d6b9019aa3c1",
"versionType": "git"
},
{
"status": "affected",
"version": "11fab500f86403b2ebf6795feeade6e10302e448",
"versionType": "git"
},
{
"status": "affected",
"version": "5.15.35",
"lessThan": "5.15.113",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.17.4",
"lessThan": "5.18",
"versionType": "semver"
}
],
"programFiles": [
"net/sunrpc/svc_xprt.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.18",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.113",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.30",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.3.4",
"versionType": "semver",
"lessThanOrEqual": "6.3.*"
},
{
"status": "unaffected",
"version": "6.4",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/sunrpc/svc_xprt.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2023-54269
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #30373 · Revision 1
- Added to Heist Feed
- Publisher date