CVE-2025-5915Public exploit

Memory disclosure and crashes via oversized RAR filter

Published Jun 9, 2025 · Updated Sep 1, 2026

Heap buffer over-read in libarchive 3.6.0 through 3.7.9 allows local users to crash applications or disclose memory via a crafted RAR archive. copy_from_lzss_window accepts a filter block larger than the LZSS dictionary window and passes the excessive length to memcpy, reading beyond the heap allocation. Exploitation requires a user or consuming application to process the malicious archive; reported consequences are process crashes and adjacent-memory disclosure.

CVSS severity6.6
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer over-read in libarchive 3.6.0 through 3.7.9 allows local users to crash applications or disclose memory via a crafted RAR archive. copy_from_lzss_window accepts a filter block larger than the LZSS dictionary window and passes the excessive length to memcpy, reading beyond the heap allocation. Exploitation requires a user or consuming application to process the malicious archive; reported consequences are process crashes and adjacent-memory disclosure.

The record

CVE
CVE-2025-5915
Published
Jun 9, 2025
Updated
Sep 1, 2026
Vendor
389 Directory Server
Product
Red Hat Enterprise Linux 10
Classifications
CWE-122, T1204.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

389 Directory Server · Red Hat Enterprise Linux 10Affected versions are unavailable in this record.
libarchive · libarchiveversion=0 <3.8.0
389 Directory Server · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
389 Directory Server · Red Hat OpenShift Container Platform 4Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.

Published CVSS scores

6.6Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:H
3.9GitHubCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
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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