CVE-2026-74595

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0baeb730044981f5ec5fb7d62a3763835ea606f6
https://git.kernel.org/stable/c/174633a468817a49bd474bcfc9067c84e54efe68
https://git.kernel.org/stable/c/33b7e810ce09955aa02f3b632455cf5e7ac990a9
https://git.kernel.org/stable/c/653e888a24c87b8bbeab44d7e558a1c1a3641088
https://git.kernel.org/stable/c/6a67c460b12315033268dce597546984fe5739e7
https://git.kernel.org/stable/c/98516ba8b817f34e86bdd7a5b7a383cff75c3ddf
https://git.kernel.org/stable/c/cf6c993c0feca7984797e634deba3c80342e199a

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-22 16:16

Updated : 2026-08-25 06:18

NVD link : CVE-2026-74595

Mitre link : CVE-2026-74595

CVE.ORG link : CVE-2026-74595

JSON object : View

Products Affected

No product.

CWE

No CWE.

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