fscrypt: use the mount idmap for the owner check in fscrypt_ioctl_set_policy()
In the Linux kernel, the following vulnerability has been resolved: fscrypt: use the mount idmap for the owner check in fscrypt_ioctl_set_policy() fscrypt_ioctl_set_policy() calls inode_owner_or_capable() with &nop_mnt_idmap before allowing an encryption policy to be set, instead of the idmap of the mount the ioctl was issued on. fscrypt is used by filesystems that support idmapped mounts (e.g. ext4, f2fs), so on such a mount this compares the caller's fsuid against the unmapped on-disk owner rather than the mapped owner: the actual owner can be wrongly denied with -EACCES and an unrelated caller wrongly allowed. Use file_mnt_idmap(filp) instead.
CVE-2026-74595
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-2026-74595
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": "14f3db5542e62bcf6fe088a09760ac52d55306c5",
"lessThan": "174633a468817a49bd474bcfc9067c84e54efe68",
"versionType": "git"
},
{
"status": "affected",
"version": "14f3db5542e62bcf6fe088a09760ac52d55306c5",
"lessThan": "0baeb730044981f5ec5fb7d62a3763835ea606f6",
"versionType": "git"
},
{
"status": "affected",
"version": "14f3db5542e62bcf6fe088a09760ac52d55306c5",
"lessThan": "33b7e810ce09955aa02f3b632455cf5e7ac990a9",
"versionType": "git"
},
{
"status": "affected",
"version": "14f3db5542e62bcf6fe088a09760ac52d55306c5",
"lessThan": "6a67c460b12315033268dce597546984fe5739e7",
"versionType": "git"
},
{
"status": "affected",
"version": "14f3db5542e62bcf6fe088a09760ac52d55306c5",
"lessThan": "653e888a24c87b8bbeab44d7e558a1c1a3641088",
"versionType": "git"
},
{
"status": "affected",
"version": "14f3db5542e62bcf6fe088a09760ac52d55306c5",
"lessThan": "98516ba8b817f34e86bdd7a5b7a383cff75c3ddf",
"versionType": "git"
},
{
"status": "affected",
"version": "14f3db5542e62bcf6fe088a09760ac52d55306c5",
"lessThan": "cf6c993c0feca7984797e634deba3c80342e199a",
"versionType": "git"
}
],
"programFiles": [
"fs/crypto/policy.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.217",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.184",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.152",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.104",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.45",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.9",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/crypto/policy.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74595
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33230 · Revision 1
- Added to Heist Feed
- Publisher date