CVE-2022-49258

Kernel memory corruption via freed cipher key

Published Feb 26, 2025 · Updated May 11, 2026

Use-after-free in the ccree cipher driver in Linux 4.17 and later affected branches allows local users to corrupt kernel memory. cc_cipher_exit() frees ctx_p->user.key with kfree_sensitive() and then passes the freed key to dev_dbg(), causing the invalid access. Local low-privileged access is required, and the affected ccree driver path must be exercised for the consequence to occur.

CVSS severity7.8
High
EPSS probability0.26%
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 the ccree cipher driver in Linux 4.17 and later affected branches allows local users to corrupt kernel memory. cc_cipher_exit() frees ctx_p->user.key with kfree_sensitive() and then passes the freed key to dev_dbg(), causing the invalid access. Local low-privileged access is required, and the affected ccree driver path must be exercised for the consequence to occur.

The record

CVE
CVE-2022-49258
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=4.17
  2. Affected versionversion=63ee04c8b491ee148489347e7da9fbfd982ca2bb <25c358efee5153dfd240d4e0d3169d5bebe9cacd
  3. Affected versionversion=63ee04c8b491ee148489347e7da9fbfd982ca2bb <335bf1fc74f775a8255257aa3e33763f2257b676
  4. Affected versionversion=63ee04c8b491ee148489347e7da9fbfd982ca2bb <3d950c34074ed74d2713c3856ba01264523289e6
  5. Affected versionversion=63ee04c8b491ee148489347e7da9fbfd982ca2bb <c93017c8d5ebf55a4e453ac7c84cc84cf92ab570
  6. Affected versionversion=63ee04c8b491ee148489347e7da9fbfd982ca2bb <cffb5382bd8d3cf21b874ab5b84bf7618932286b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.17; version=63ee04c8b491ee148489347e7da9fbfd982ca2bb <25c358efee5153dfd240d4e0d3169d5bebe9cacd; version=63ee04c8b491ee148489347e7da9fbfd982ca2bb <335bf1fc74f775a8255257aa3e33763f2257b676; version=63ee04c8b491ee148489347e7da9fbfd982ca2bb <3d950c34074ed74d2713c3856ba01264523289e6; version=63ee04c8b491ee148489347e7da9fbfd982ca2bb <c93017c8d5ebf55a4e453ac7c84cc84cf92ab570; version=63ee04c8b491ee148489347e7da9fbfd982ca2bb <cffb5382bd8d3cf21b874ab5b84bf7618932286b

Published CVSS scores

7.8CISA ADP VulnrichmentCVSS: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

CWE-416Use After Free
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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