mptcp: avoid unneeded actions on subflow reset
In the Linux kernel, the following vulnerability has been resolved: mptcp: avoid unneeded actions on subflow reset Once in a blue moon, the mptcp receive path can recursively call mptcp_data_ready() via state change under unlucky error conditions, and then try to hold the data lock again. Break the recursion loop explicitly checking for the exceptional condition. Add a new flag instead of using an existing one like 'closing', to exit early in subflow_state_change(), and explicitly flush the RX queue at reset time. This avoids unneeded processing to check for available data -- calling get_mapping_status() and more on a dying subflow -- but also in error reporting and worker scheduling. Note that we must consume the currently peeked skb before invoking mptcp_dss_corruption to avoid consuming it again after the eventual reset has freed it.
CVE-2026-97524
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-2026-97524
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": "fde99e972b8f88cebe619241d7aa43d288ef666a",
"lessThan": "6d669c740933124eae3df8cfc15995af9bcc6aba",
"versionType": "git"
},
{
"status": "affected",
"version": "12c1676d598e3b8dd92a033b623b792cc2ea1ec5",
"lessThan": "83a7dcdd2b1060484528da70a643125174d47e5a",
"versionType": "git"
},
{
"status": "affected",
"version": "35668f8ec84f6c944676e48ecc6bbc5fc8e6fe25",
"lessThan": "a370e56024df0b07e3120c45a9773ae123819fd6",
"versionType": "git"
},
{
"status": "affected",
"version": "b8be15d1ae7ea4eedd547c3b3141f592fbddcd30",
"lessThan": "1962841387087970d75ba8b8d4c2aa2d45705e50",
"versionType": "git"
},
{
"status": "affected",
"version": "e32d262c89e2b22cb0640223f953b548617ed8a6",
"lessThan": "4b7abdcb5ba832fafab679f0d998af39cbc99307",
"versionType": "git"
},
{
"status": "affected",
"version": "e32d262c89e2b22cb0640223f953b548617ed8a6",
"lessThan": "b2dbcc1ed48b5ac070a41db4a52aade6823c4df0",
"versionType": "git"
},
{
"status": "affected",
"version": "e32d262c89e2b22cb0640223f953b548617ed8a6",
"lessThan": "ce7e4ede01ed3e47a48c0f1ce1d87bf4864bee9f",
"versionType": "git"
},
{
"status": "affected",
"version": "e32d262c89e2b22cb0640223f953b548617ed8a6",
"lessThan": "2b0f561f21b27c40c91ea4975268a06092bd7e9c",
"versionType": "git"
},
{
"status": "affected",
"version": "8bfd391bde685df7289b928ce8876a3583be4bfb",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.228",
"lessThan": "5.10.271",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.169",
"lessThan": "5.15.222",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.113",
"lessThan": "6.1.189",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.57",
"lessThan": "6.6.158",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.11.4",
"lessThan": "6.12",
"versionType": "semver"
}
],
"programFiles": [
"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": "6.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/mptcp/protocol.c",
"net/mptcp/protocol.h",
"net/mptcp/subflow.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-97524
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #37985 · Revision 1
- Added to Heist Feed
- Publisher date