rcu/nocb: Fix possible invalid rdp's->nocb_cb_kthread pointer access
In the Linux kernel, the following vulnerability has been resolved: rcu/nocb: Fix possible invalid rdp's->nocb_cb_kthread pointer access In the preparation stage of CPU online, if the corresponding the rdp's->nocb_cb_kthread does not exist, will be created, there is a situation where the rdp's rcuop kthreads creation fails, and then de-offload this CPU's rdp, does not assign this CPU's rdp->nocb_cb_kthread pointer, but this rdp's->nocb_gp_rdp and rdp's->rdp_gp->nocb_gp_kthread is still valid. This will cause the subsequent re-offload operation of this offline CPU, which will pass the conditional check and the kthread_unpark() will access invalid rdp's->nocb_cb_kthread pointer. This commit therefore use rdp's->nocb_gp_kthread instead of rdp_gp's->nocb_gp_kthread for safety check.
CVE-2025-38704
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-2025-38704
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": "3a5761dc025da47960755ac64d9fbf1c32e8cd80",
"lessThan": "b097ae798298885695c339d390b48b4e39619fa7",
"versionType": "git"
},
{
"status": "affected",
"version": "3a5761dc025da47960755ac64d9fbf1c32e8cd80",
"lessThan": "3da45ec1e485a1a5ad31fe9ddd467c7ee5ae4ef9",
"versionType": "git"
},
{
"status": "affected",
"version": "3a5761dc025da47960755ac64d9fbf1c32e8cd80",
"lessThan": "cce3d027227c69e85896af9fbc6fa9af5c68f067",
"versionType": "git"
},
{
"status": "affected",
"version": "3a5761dc025da47960755ac64d9fbf1c32e8cd80",
"lessThan": "1c951683a720b17c9ecaad1932bc95b29044611f",
"versionType": "git"
},
{
"status": "affected",
"version": "3a5761dc025da47960755ac64d9fbf1c32e8cd80",
"lessThan": "9b5ec8e6b31755288a07b3abeeab8cd38e9d3c9d",
"versionType": "git"
},
{
"status": "affected",
"version": "3a5761dc025da47960755ac64d9fbf1c32e8cd80",
"lessThan": "1bba3900ca18bdae28d1b9fa10f16a8f8cb2ada1",
"versionType": "git"
}
],
"programFiles": [
"kernel/rcu/tree_nocb.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.167",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.130",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.43",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.15.11",
"versionType": "semver",
"lessThanOrEqual": "6.15.*"
},
{
"status": "unaffected",
"version": "6.16.2",
"versionType": "semver",
"lessThanOrEqual": "6.16.*"
},
{
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/rcu/tree_nocb.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-38704
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #27049 · Revision 1
- Added to Heist Feed
- Publisher date