SUNRPC: wait for in-flight client TLS handshake callback
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: wait for in-flight client TLS handshake callback xs_tls_handshake_sync() gives xs_tls_handshake_done() a reference to the lower transport before submitting the handshake request. On timeout or signal, the synchronous waiter drops that reference after calling tls_handshake_cancel(). handshake_req_cancel() returns false when handshake_complete() has already marked the request complete. In that case the completion callback can still be running, so dropping the callback-owned reference in the waiter can free the lower transport before xs_tls_handshake_done() stores xprt_err or drops its own reference. If cancellation loses to completion, wait until xs_tls_handshake_done() signals handshake_done and let the callback release its reference. This mirrors the server-side handshake lifetime handling and keeps the timeout or signal return value unchanged.
CVE-2026-89536
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-2026-89536
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": "75eb6af7acdf566c68d61e98e67ee2f235201c02",
"lessThan": "fb43997407bc17ee39bac81ab708101312e255f5",
"versionType": "git"
},
{
"status": "affected",
"version": "75eb6af7acdf566c68d61e98e67ee2f235201c02",
"lessThan": "15431820f448e09f8029b670d5c82aa5917d4625",
"versionType": "git"
},
{
"status": "affected",
"version": "75eb6af7acdf566c68d61e98e67ee2f235201c02",
"lessThan": "1de391e8b94e31b45c19c16dbf315e294810c7de",
"versionType": "git"
},
{
"status": "affected",
"version": "75eb6af7acdf566c68d61e98e67ee2f235201c02",
"lessThan": "7fbb6d2ab0391eb8d1f1a68e6bc263ef02cea61b",
"versionType": "git"
},
{
"status": "affected",
"version": "75eb6af7acdf566c68d61e98e67ee2f235201c02",
"lessThan": "a89dd597458848b463d284b15e42a8078beeb046",
"versionType": "git"
}
],
"programFiles": [
"net/sunrpc/xprtsock.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.5"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.5",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/sunrpc/xprtsock.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89536
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #35055 · Revision 1
- Added to Heist Feed
- Publisher date