CVE-2022-27447Network attack vector

Server crash via stale virtual-column expression

Published Apr 14, 2022 · Updated Aug 3, 2024

Use-after-free in MariaDB Server 10.9 and earlier allows remote authenticated users to crash the database through crafted SQL. When a table with a crafted virtual-column expression is reopened from cache, the expression retains item pointers allocated outside its persistent arena, so Binary_string::free_buffer accesses prematurely freed memory. The attacker needs permission to create or query the affected virtual-column definition; exploitation terminates the server process and interrupts database availability.

CVSS severity7.5
High
EPSS probability2.25%
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 MariaDB Server 10.9 and earlier allows remote authenticated users to crash the database through crafted SQL. When a table with a crafted virtual-column expression is reopened from cache, the expression retains item pointers allocated outside its persistent arena, so Binary_string::free_buffer accesses prematurely freed memory. The attacker needs permission to create or query the affected virtual-column definition; exploitation terminates the server process and interrupts database availability.

The record

CVE
CVE-2022-27447
Published
Apr 14, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.1SUSECVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Application or System Exploitation

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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