net/rds: handle zerocopy send cleanup before the message is queued
In the Linux kernel, the following vulnerability has been resolved: net/rds: handle zerocopy send cleanup before the message is queued A zerocopy send can fail after user pages have been pinned but before the message is attached to the sending socket. The purge path currently infers zerocopy state from rm->m_rs, so an unqueued message can be cleaned up as if it owned normal payload pages. However, zerocopy ownership is really determined by the presence of op_mmp_znotifier, regardless of whether the message has reached the socket queue. Capture op_mmp_znotifier up front in rds_message_purge() and use it as the cleanup discriminator. If the message is already associated with a socket, keep the existing completion path. Otherwise, drop the pinned page accounting directly and release the notifier before putting the payload pages. This keeps early send failure cleanup consistent with the zerocopy lifetime rules without changing the normal queued completion path.
CVE-2026-43502
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-2026-43502
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": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
"lessThan": "e9aefdc5c53fe9aed108c14e3d155710a1bb14c9",
"versionType": "git"
},
{
"status": "affected",
"version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
"lessThan": "46662f7dc59475995609bf3e9d27eb36f4acf26f",
"versionType": "git"
},
{
"status": "affected",
"version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
"lessThan": "1e262db7675e27f42c3f3f47d6011855f4454f24",
"versionType": "git"
},
{
"status": "affected",
"version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
"lessThan": "21d70744e6d3bbf9293aa1ee6fba7c53ad75275e",
"versionType": "git"
},
{
"status": "affected",
"version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
"lessThan": "3abc8983b2bae3f487f77d9da5527d7d6b210d46",
"versionType": "git"
},
{
"status": "affected",
"version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
"lessThan": "14ef6fd18db2494098b21e0471bf27a1d8e9993e",
"versionType": "git"
},
{
"status": "affected",
"version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
"lessThan": "0f5c185fc79a59ee9991234dd6d2a3e5afa6e75b",
"versionType": "git"
},
{
"status": "affected",
"version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3",
"lessThan": "44b550d88b267320459d518c0743a241ab2108fa",
"versionType": "git"
}
],
"programFiles": [
"net/rds/message.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.258",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.140",
"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": [
"net/rds/message.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-43502
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #28355 · Revision 1
- Added to Heist Feed
- Publisher date