CVE-2022-26280Network attack vector

Memory disclosure and crash via truncated LZMA header

Published Mar 28, 2022 · Updated Nov 3, 2025

Out-of-bounds read in Libarchive 3.6.0 allows remote attackers to disclose memory or crash a consuming process via a crafted ZIPX archive. zipx_lzma_alone_init requests nine bytes of LZMA header data without first verifying that the ZIP entry has nine bytes remaining. Exploitation requires an application to process attacker-controlled ZIPX content; the bounded effects are memory disclosure and process termination, not data modification.

CVSS severity6.5
Medium
EPSS probability1.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Libarchive 3.6.0 allows remote attackers to disclose memory or crash a consuming process via a crafted ZIPX archive. zipx_lzma_alone_init requests nine bytes of LZMA header data without first verifying that the ZIP entry has nine bytes remaining. Exploitation requires an application to process attacker-controlled ZIPX content; the bounded effects are memory disclosure and process termination, not data modification.

The record

CVE
CVE-2022-26280
Published
Mar 28, 2022
Updated
Nov 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record 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

6.5NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
5.8NIST NVDAV:N/AC:M/Au:N/C:P/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

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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