nvmet-tcp: fix race between ICReq handling and queue teardown
In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: fix race between ICReq handling and queue teardown nvmet_tcp_handle_icreq() updates queue->state after sending an Initialization Connection Response (ICResp), but it does so without serializing against target-side queue teardown. If an NVMe/TCP host sends an Initialization Connection Request (ICReq) and immediately closes the connection, target-side teardown may start in softirq context before io_work drains the already buffered ICReq. In that case, nvmet_tcp_schedule_release_queue() sets queue->state to NVMET_TCP_Q_DISCONNECTING and drops the queue reference under state_lock. If io_work later processes that ICReq, nvmet_tcp_handle_icreq() can still overwrite the state back to NVMET_TCP_Q_LIVE. That defeats the DISCONNECTING-state guard in nvmet_tcp_schedule_release_queue() and allows a later socket state change to re-enter teardown and issue a second kref_put() on an already released queue. The ICResp send failure path has the same problem. If teardown has already moved the queue to DISCONNECTING, a send error can still overwrite the state with NVMET_TCP_Q_FAILED, again reopening the window for a second teardown path to drop the queue reference. Fix this by serializing both post-send state transitions with state_lock and bailing out if teardown has already started. Use -ESHUTDOWN as an internal sentinel for that bail-out path rather than propagating it as a transport error like -ECONNRESET. Keep n
CVE-2026-46135
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-2026-46135
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": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
"lessThan": "b7dd4d27aa70bd98bb10572310e913668baf6a65",
"versionType": "git"
},
{
"status": "affected",
"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
"lessThan": "9c63cf80895a70eb4fcfcaa725bb1ac9ae76f02b",
"versionType": "git"
},
{
"status": "affected",
"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
"lessThan": "6f96dea4819d122737b217ea16660d255abbf8c6",
"versionType": "git"
},
{
"status": "affected",
"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
"lessThan": "5f0b95ef68ab9afba75b20eebf436130f80c161a",
"versionType": "git"
},
{
"status": "affected",
"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
"lessThan": "49891c8fe0cb43fbbe480da1cdccfbbaeb820cb3",
"versionType": "git"
},
{
"status": "affected",
"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
"lessThan": "67e1aaf93b495c2f10bc8a5fbba575fbb7f449b6",
"versionType": "git"
},
{
"status": "affected",
"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
"lessThan": "dcfe4d1f7960e7d1c01642318f3aae1a604f8508",
"versionType": "git"
},
{
"status": "affected",
"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
"lessThan": "5293a8882c549fab4a878bc76b0b6c951f980a61",
"versionType": "git"
}
],
"programFiles": [
"drivers/nvme/target/tcp.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.144",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.88",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.30",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.7",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/nvme/target/tcp.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46135
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #40139 · Revision 1
- Added to Heist Feed
- Publisher date