mptcp: plug races between subflow fail and subflow creation
In the Linux kernel, the following vulnerability has been resolved: mptcp: plug races between subflow fail and subflow creation We have races similar to the one addressed by the previous patch between subflow failing and additional subflow creation. They are just harder to trigger. The solution is similar. Use a separate flag to track the condition 'socket state prevent any additional subflow creation' protected by the fallback lock. The socket fallback makes such flag true, and also receiving or sending an MP_FAIL option. The field 'allow_infinite_fallback' is now always touched under the relevant lock, we can drop the ONCE annotation on write.
CVE-2025-38552
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-2025-38552
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": "478d770008b03ed9d74bdc8add2315b7fd124ecc",
"lessThan": "c476d627584b7589a134a8b48dd5c6639e4401c5",
"versionType": "git"
},
{
"status": "affected",
"version": "478d770008b03ed9d74bdc8add2315b7fd124ecc",
"lessThan": "7c96d519ee15a130842a6513530b4d20acd2bfcd",
"versionType": "git"
},
{
"status": "affected",
"version": "478d770008b03ed9d74bdc8add2315b7fd124ecc",
"lessThan": "f81b6fbe13c7fc413b5158cdffc6a59391a2a8db",
"versionType": "git"
},
{
"status": "affected",
"version": "478d770008b03ed9d74bdc8add2315b7fd124ecc",
"lessThan": "659da22dee5ff316ba63bdaeeac7b58b5442f6c2",
"versionType": "git"
},
{
"status": "affected",
"version": "478d770008b03ed9d74bdc8add2315b7fd124ecc",
"lessThan": "def5b7b2643ebba696fc60ddf675dca13f073486",
"versionType": "git"
}
],
"programFiles": [
"net/mptcp/pm.c",
"net/mptcp/protocol.c",
"net/mptcp/protocol.h",
"net/mptcp/subflow.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.149",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.101",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.40",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.15.8",
"versionType": "semver",
"lessThanOrEqual": "6.15.*"
},
{
"status": "unaffected",
"version": "6.16",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/mptcp/pm.c",
"net/mptcp/protocol.c",
"net/mptcp/protocol.h",
"net/mptcp/subflow.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-38552
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #30591 · Revision 1
- Added to Heist Feed
- Publisher date