CVE-2022-27376Public exploitNetwork attack vector

Database service crash via stale virtual-column expression

Published Apr 12, 2022 · Updated Aug 3, 2024

Use-after-free in MariaDB Server 10.6.5 and earlier allows remote attackers to crash the database service with crafted SQL statements. Item_args::walk_arg traverses child items allocated outside the virtual-column expression arena, so reopening a cached table leaves a stale expression that dereferences prematurely freed items. Network access that permits SQL submission is required; the demonstrated consequence is a server crash, not data disclosure or modification.

CVSS severity7.5
High
EPSS probability2.20%
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 10.6.5 and earlier allows remote attackers to crash the database service with crafted SQL statements. Item_args::walk_arg traverses child items allocated outside the virtual-column expression arena, so reopening a cached table leaves a stale expression that dereferences prematurely freed items. Network access that permits SQL submission is required; the demonstrated consequence is a server crash, not data disclosure or modification.

The record

CVE
CVE-2022-27376
Published
Apr 12, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 12, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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