7.5

CVE-2026-14164: libarchive Double Free

CVSS: 7.5v3.1HighAwaiting analysis
AliasesRHSA-2026:30333RHSA-2026:52674RHSA-2026:52675
Published 30-06-2026Last modified 14-10-2026
Open JSON

Vulnerability summary

CVE-2026-14164 is a high (CVSS 7.5) Double Free vulnerability in libarchive. EPSS estimates a 0.79% chance of exploitation in the next 30 days, higher than 55.5% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.79%
0%100%
Low · +0.30 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
MGASA-2026-0366USN-8581-1

Timeline

  1. 30-06-2026
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

Description

A double free issue has been identified in libarchive's RAR5 reader. During parsing of a specially crafted RAR5 archive, the filtered_buf pointer may remain stale after being freed during unpacking state reinitialization. Subsequent processing of another archive entry can trigger a second free of the same memory region, resulting in a double-free condition. Successful exploitation may cause applications using the vulnerable libarchive API to terminate unexpectedly, leading to a denial of service.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.79%

Chance of exploitation in the next 30 days

Percentile

56%

Versus all other CVEs

30-day change

+0.30 pp

From 0.49% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.79%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Redhat12 products
  • bsdcat< 0:3.8.8-2.hum1
  • bsdcat-debuginfo< 0:3.5.3-11.el9_8 | < 0:3.7.7-10.el10_2 | < 0:3.7.7-5.el10_0.1 | < 0:3.5.3-7.el9_6.2 | < 0:3.5.3-5.el9_4.2 | < 0:3.5.3-5.el9_2.3
  • bsdcpio< 0:3.8.8-2.hum1
  • bsdcpio-debuginfo< 0:3.5.3-11.el9_8 | < 0:3.7.7-10.el10_2 | < 0:3.7.7-5.el10_0.1 | < 0:3.5.3-7.el9_6.2 | < 0:3.5.3-5.el9_4.2 | < 0:3.5.3-5.el9_2.3
  • bsdtar< 0:3.8.8-2.hum1 | < 0:3.5.3-11.el9_8 | < 0:3.7.7-10.el10_2 | < 0:3.7.7-5.el10_0.1 | < 0:3.5.3-7.el9_6.2 | < 0:3.5.3-5.el9_4.2 | < 0:3.5.3-5.el9_2.3
Debian1 product
  • libarchive< 3.6.2-1+deb12u5 | All versions (No fix recorded) | < 3.8.8-1
Ubuntu1 product
  • libarchive< 3.4.0-2ubuntu1.5+esm3 | < 3.6.0-1ubuntu1.8 | < 3.7.2-2ubuntu0.8 | All versions (No fix recorded) | < 3.8.5-1ubuntu2.2

3 vendors · 14 products

References

70 links
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