nvmet-tcp: fix page fragment cache leak in error path
In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: fix page fragment cache leak in error path In nvmet_tcp_alloc_queue(), when a connection is closed during the allocation process (e.g., nvmet_tcp_set_queue_sock() returns -ENOTCONN), the error handling jumps to out_destroy_sq and then to out_ida_remove without draining the page fragment cache. Although nvmet_tcp_free_cmd() is called in some error paths to release individual page fragments, the underlying page cache reference held by queue->pf_cache is never released. The first allocation using pf_cache is the call to nvmet_tcp_alloc_cmd() for queue->connect, which happens after ida_alloc() returns successfully. This results in a page leak each time a connection fails during allocation, which could lead to memory exhaustion over time if connections are repeatedly opened and closed. Fix this by calling page_frag_cache_drain() before freeing the queue structure in the out_ida_remove label.
CVE-2026-74386
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-2026-74386
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": "fc11e3f0daaadb6e600a86e54b089d4662d0a464",
"versionType": "git"
},
{
"status": "affected",
"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
"lessThan": "a43a9abc1ebf663f0aa56a729106f68dd9c77da6",
"versionType": "git"
},
{
"status": "affected",
"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
"lessThan": "ba3209704b3cd46961e4e081af5c52a780785648",
"versionType": "git"
},
{
"status": "affected",
"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
"lessThan": "5fbe83a374f09561a0f0c1f4aa021501ffd681eb",
"versionType": "git"
},
{
"status": "affected",
"version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30",
"lessThan": "4dae393956093c807212918fd91a8fc70df15338",
"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": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/nvme/target/tcp.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74386
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46556 · Revision 1
- Added to Heist Feed
- Publisher date