CVE-2022-28044

Heap corruption via invalid suffix deallocation

Published Apr 15, 2022 · Updated Aug 3, 2024

Heap memory corruption in lrzip 0.640 allows attackers to corrupt process memory through unsafe command-line suffix handling. initialise_control stores the default .lrz suffix as a pointer to static storage, while cleanup and suffix changes pass that pointer to the heap deallocator. The flaw is reached when lrzip initializes or replaces a suffix and later frees the control structure; public evidence establishes heap corruption but not code execution.

CVSS severity9.8
Critical
EPSS probability1.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap memory corruption in lrzip 0.640 allows attackers to corrupt process memory through unsafe command-line suffix handling. initialise_control stores the default .lrz suffix as a pointer to static storage, while cleanup and suffix changes pass that pointer to the heap deallocator. The flaw is reached when lrzip initializes or replaces a suffix and later frees the control structure; public evidence establishes heap corruption but not code execution.

The record

CVE
CVE-2022-28044
Published
Apr 15, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Apr 15, 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 vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

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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