CVE-2026-48112Public exploitNetwork attack vector

Service interruption via unchecked SYMDEF names offset

Published Jun 5, 2026 · Updated Jun 5, 2026

Out-of-bounds read in 7-Zip 9.34 through 26.00 allows attackers to interrupt the application by opening a crafted ar archive. In CHandler::ParseLibSymbols, the BSD __.SYMDEF path permits namesStart to equal the heap buffer size, then Get32 reads namesSize before the later bounds check. A user must open the archive; the four bytes affect only a rejected bounds check and are not exposed through output, bounding the documented consequence to process availability.

CVSS severity3.5
Low
EPSS probability0.27%
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 7-Zip 9.34 through 26.00 allows attackers to interrupt the application by opening a crafted ar archive. In CHandler::ParseLibSymbols, the BSD __.SYMDEF path permits namesStart to equal the heap buffer size, then Get32 reads namesSize before the later bounds check. A user must open the archive; the four bytes affect only a rejected bounds check and are not exposed through output, bounding the documented consequence to process availability.

The record

CVE
CVE-2026-48112
Published
Jun 5, 2026
Updated
Jun 5, 2026
Vendor
7-Zip
Product
7-Zip
Classifications
CWE-190, CWE-125, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 5, 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=>= 9.34, < 26.01

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

7-Zip · 7-Zipversion=>= 9.34, < 26.01

Published CVSS scores

3.5GitHub Security LabCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

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-190Integer Overflow or Wraparound
CWE-125Out-of-bounds Read
T1204.002Malicious File

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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