{"id":"CVE-2026-74595","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-74595","generatedAt":"2026-10-28T07:25:55.993Z","title":"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…","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfscrypt: use the mount idmap for the owner check in fscrypt_ioctl_set_policy()\n\nfscrypt_ioctl_set_policy() calls inode_owner_or_capable() with\n&nop_mnt_idmap before allowing an encryption policy to be set, instead\nof the idmap of the mount the ioctl was issued on.\n\nfscrypt is used by filesystems that support idmapped mounts (e.g. ext4,\nf2fs), so on such a mount this compares the caller's fsuid against the\nunmapped on-disk owner rather than the mapped owner: the actual owner\ncan be wrongly denied with -EACCES and an unrelated caller wrongly\nallowed.  Use file_mnt_idmap(filp) instead.","published":"2026-08-22T16:16:32.000Z","lastModified":"2026-10-16T20:17:45.000Z","status":"Received","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":[],"affected":[],"epss":{"score":0.00092,"percentile":0.00507,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.09%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/0baeb730044981f5ec5fb7d62a3763835ea606f6","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/174633a468817a49bd474bcfc9067c84e54efe68","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/33b7e810ce09955aa02f3b632455cf5e7ac990a9","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/653e888a24c87b8bbeab44d7e558a1c1a3641088","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6a67c460b12315033268dce597546984fe5739e7","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/98516ba8b817f34e86bdd7a5b7a383cff75c3ddf","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cf6c993c0feca7984797e634deba3c80342e199a","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74595","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}