configfs: pin the symlink target's dirent instead of chasing ->ci_dentry
In the Linux kernel, the following vulnerability has been resolved: configfs: pin the symlink target's dirent instead of chasing ->ci_dentry create_link() reads the target's configfs_dirent from item->ci_dentry->d_fsdata, relying on the item reference taken by get_target(). That reference pins the item, not its dentry: the dentry is pinned by DCACHE_PERSISTENT, which configfs_remove_dir() releases via simple_rmdir() while the item is still alive. A symlink racing with rmdir of its target can therefore find ->ci_dentry freed and its dirent released, triggering WARN_ON(!atomic_read(&sd->s_count)) in configfs_get(). Take the dirent in get_target() as well, under ->d_lock and atomically with the item reference, and pass it down to create_link(). A hashed dentry has not been killed yet, so its ->d_fsdata reference keeps the dirent alive there.
CVE-2026-97950
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-2026-97950
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": "7063fbf2261194f72ee75afca67b3b38b554b5fa",
"lessThan": "a44744454eafbc158e8c8e3ef8d207076410b195",
"versionType": "git"
},
{
"status": "affected",
"version": "7063fbf2261194f72ee75afca67b3b38b554b5fa",
"lessThan": "846ff40fd57a47e59a41f4e331ec3b34efaddc23",
"versionType": "git"
},
{
"status": "affected",
"version": "7063fbf2261194f72ee75afca67b3b38b554b5fa",
"lessThan": "4f54beb2e7f6d399396466682fba3539bcdcb414",
"versionType": "git"
},
{
"status": "affected",
"version": "7063fbf2261194f72ee75afca67b3b38b554b5fa",
"lessThan": "d47c5de1cd6bfbe1067fc310bf90e4e00205e839",
"versionType": "git"
},
{
"status": "affected",
"version": "7063fbf2261194f72ee75afca67b3b38b554b5fa",
"lessThan": "a7c1290eef60711c10289c056ad32ed1f2b47b12",
"versionType": "git"
}
],
"programFiles": [
"fs/configfs/symlink.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/configfs/symlink.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-97950
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48814 · Revision 1
- Added to Heist Feed
- Publisher date