CVE-2026-68147

Local privilege escalation via fscrypt key use-after-free

Published Aug 10, 2026 · Updated Aug 10, 2026

Use-after-free in affected Linux kernels allows local users to escalate privileges during inline-encryption key eviction. fscrypt_destroy_inline_crypt_key() frees and zeroizes a blk_crypto_key after fscrypt_get_devices() allocation failure without first evicting it from block-crypto users, leaving dangling references. Reachability requires local low-privileged access, an inline-encryption filesystem, and allocation failure during inode eviction or key removal; subsequent reuse permits kernel memory corruption, disclosure, a panic, or privilege escalation.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in affected Linux kernels allows local users to escalate privileges during inline-encryption key eviction. fscrypt_destroy_inline_crypt_key() frees and zeroizes a blk_crypto_key after fscrypt_get_devices() allocation failure without first evicting it from block-crypto users, leaving dangling references. Reachability requires local low-privileged access, an inline-encryption filesystem, and allocation failure during inode eviction or key removal; subsequent reuse permits kernel memory corruption, disclosure, a panic, or privilege escalation.

The record

CVE
CVE-2026-68147
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=22e9947a4b2ba255888541bd0111cf00b9b16586 <4462ac3d90e897dda52ce4b6af2d526ddae835a8
  2. Affected versionversion=22e9947a4b2ba255888541bd0111cf00b9b16586 <6fe4e4b8259e1330945b5f3c9476e08473b8e0e8
  3. Affected versionversion=22e9947a4b2ba255888541bd0111cf00b9b16586 <81ea8e8221853950c47dac7164f27c63a96f8f86
  4. Affected versionversion=22e9947a4b2ba255888541bd0111cf00b9b16586 <97a688563be71ec6fefc071aff69a66c69dbe244
  5. Affected versionversion=22e9947a4b2ba255888541bd0111cf00b9b16586 <bc2d630296e0e049210ec05ff08459a6893ae749
  6. Affected versionversion=6.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=22e9947a4b2ba255888541bd0111cf00b9b16586 <4462ac3d90e897dda52ce4b6af2d526ddae835a8; version=22e9947a4b2ba255888541bd0111cf00b9b16586 <6fe4e4b8259e1330945b5f3c9476e08473b8e0e8; version=22e9947a4b2ba255888541bd0111cf00b9b16586 <81ea8e8221853950c47dac7164f27c63a96f8f86; version=22e9947a4b2ba255888541bd0111cf00b9b16586 <97a688563be71ec6fefc071aff69a66c69dbe244; version=22e9947a4b2ba255888541bd0111cf00b9b16586 <bc2d630296e0e049210ec05ff08459a6893ae749; version=6.1

Published CVSS scores

7.8Linux CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.8Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
7.8UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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