VulnerabilityPublished 30 Jun 2026Updated 6 Nov 2026

CVE-2026-14164: Red Hat Enterprise Linux 10 · Double Free

Affects Red Hat Enterprise Linux 10Source CVE Database V5

Compare

Not known to be exploited · CVSS 7.5 High.

Data as of 13 Nov 2026, 03:49 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none

CVSS scores by source
CNA (redhat)	CVSS 3.1	7.5

EPSS: 0.7% chance of exploitation in 30 days – higher than 56% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 30 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Red Hat Enterprise Linux 10libarchive	Affected–	Fixed in–
Red Hat Enterprise Linux 10.0 Extended Update Supportlibarchive	Affected–	Fixed in–
Red Hat Enterprise Linux 9libarchive	Affected–	Fixed in–
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutionslibarchive	Affected–	Fixed in–
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutionslibarchive	Affected–	Fixed in–
Red Hat Enterprise Linux 9.6 Extended Update Supportlibarchive	Affected–	Fixed in–

AI-suggested

Red Hat has released updated libarchive packages (version 3.8.8-2.hum1) for their Hardened Images RPMs that address this vulnerability. Customers should apply these security updates once available. Currently, no alternative mitigations meet Red Hat's standards for usability and stability. Monitoring for vendor advisories and applying the official patch is the recommended course of action.

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.

Impact

Successful exploitation causes applications using the vulnerable libarchive API to terminate unexpectedly, resulting in denial of service. There is no impact on confidentiality or integrity. The vulnerability is particularly relevant in automated, network-facing environments where crafted RAR5 archives may be processed without user interaction. Standalone library use requires local user interaction to trigger the flaw, resulting in a lower impact rating. No known exploits are currently reported in the wild.

Summary

CVE-2026-14164 is a double free vulnerability in the RAR5 archive parsing logic of libarchive, specifically triggered by a stale filtered_buf pointer that is freed twice during unpacking state reinitialization. This can cause memory corruption leading to application crashes (denial of service) when processing crafted RAR5 archives. The vulnerability affects libarchive versions with RAR5 support starting from 3.4.0. Red Hat Enterprise Linux 10 includes affected versions, while earlier RHEL versions do not include RAR5 support and are not affected. Red Hat has issued security updates for libarchive in their Hardened Images RPMs to fix this issue. The CVSS v3.1 score assigned by Red Hat is 7.5 (high severity) reflecting network attack vector with no privileges or user interaction required and high availability impact.

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 17 Aug 2026, 14:38 UTC

Technical details

References

Community reviews

Related threats