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CVE-2026-4424— Libarchive: libarchive: information disclosure via heap out-of-bounds read in rar archive processing

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

libarchive是libarchive开源的一款多格式存档和压缩库。 libarchive存在缓冲区错误漏洞，该漏洞源于RAR归档处理逻辑中存在堆越界读取，压缩方法转换后对LZSS滑动窗口大小的验证不当，可能导致远程攻击者通过特制RAR归档泄露敏感堆内存信息。

CVSS 7.5 · High EPSS 1.07% · P64

Affected Version Matrix 54

VendorProduct Version RangeStatus
Red Hat Cert Manager support for Red Hat OpenShift release 1.20 1790598593< * unaffected
Red Hat Red Hat AI Inference Server 3.2 1779223654< * unaffected
1779223651< * unaffected
1780681984< * unaffected
Red Hat Red Hat AI Inference Server 3.3 1778244559< * unaffected
1778244531< * unaffected
1778274666< * unaffected
1778244546< * unaffected
Red Hat Red Hat Discovery 2 1778101579< * unaffected
1778156756< * unaffected
Red Hat Red Hat Enterprise Linux 10 0:3.7.7-8.el10_1< * unaffected
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:3.7.7-5.el10_0< * unaffected
Red Hat Red Hat Enterprise Linux 6 any unknown
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:3.1.2-14.el7_9.2< * unaffected
Red Hat Red Hat Enterprise Linux 8 0:3.3.3-7.el8_10< * unaffected
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:3.3.2-8.el8_2.2< * unaffected
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:3.3.3-1.el8_4.2< * unaffected
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:3.3.3-1.el8_4.2< * unaffected
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:3.3.3-6.el8_6.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:3.3.3-6.el8_6.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:3.3.3-6.el8_6.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:3.3.3-5.el8_8.2< * unaffected
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:3.3.3-5.el8_8.2< * unaffected
Red Hat Red Hat Enterprise Linux 9 0:3.5.3-9.el9_7< * unaffected
0:3.5.3-9.el9_7< * unaffected
Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:3.5.3-2.el9_0.4< * unaffected
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:3.5.3-5.el9_2.2< * unaffected
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:3.5.3-5.el9_4< * unaffected
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:3.5.3-7.el9_6.1< * unaffected
Red Hat Red Hat Hardened Images 3.8.7-1.hum1< * unaffected
Red Hat Red Hat Insights proxy 1.5 1776868961< * unaffected
Red Hat Red Hat OpenShift Container Platform 4 any affected
Red Hat Red Hat OpenShift Container Platform 4.12 412.86.202604281506-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.13 413.92.202605271328-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.14 414.92.202605060243-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.15 415.92.202605060220-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.16 416.94.202604211449-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.17 417.94.202605112123-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.18 418.94.202604240015-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.19 4.19.9.6.202605201155-0< * unaffected
Red Hat Red Hat Update Infrastructure 5 1776868774< * unaffected
1776868744< * unaffected
1776868772< * unaffected
1776868842< * unaffected
1777459441< * unaffected
1777454300< * unaffected
1777459504< * unaffected
Red Hat RHEL-8 based Middleware Containers 7.13.5-4.1777325677< * unaffected
7.13.5-4.1777325711< * unaffected
7.13.5-4.1777325710< * unaffected
7.13.5-3.1777325680< * unaffected
7.13.5-4.1777325709< * unaffected
7.13.5-4.1777325680< * unaffected
7.13.5-4.1777325708< * unaffected
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I. Basic Information for CVE-2026-4424

Vulnerability Information
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Vulnerability Title
Libarchive: libarchive: information disclosure via heap out-of-bounds read in rar archive processing
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in libarchive. This heap out-of-bounds read vulnerability exists in the RAR archive processing logic due to improper validation of the LZSS sliding window size after transitions between compression methods. A remote attacker can exploit this by providing a specially crafted RAR archive, leading to the disclosure of sensitive heap memory information without requiring authentication or user interaction.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
libarchive 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libarchive是libarchive开源的一款多格式存档和压缩库。 libarchive存在缓冲区错误漏洞，该漏洞源于RAR归档处理逻辑中存在堆越界读取，压缩方法转换后对LZSS滑动窗口大小的验证不当，可能导致远程攻击者通过特制RAR归档泄露敏感堆内存信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 0:3.7.7-8.el10_1 ~ * cpe:/o:redhat:enterprise_linux:10.1
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:3.7.7-5.el10_0 ~ * cpe:/o:redhat:enterprise_linux_eus:10.0
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:3.1.2-14.el7_9.2 ~ * cpe:/o:redhat:rhel_els:7
Red Hat Red Hat Enterprise Linux 8 0:3.3.3-7.el8_10 ~ * cpe:/a:redhat:enterprise_linux:8::crb
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:3.3.2-8.el8_2.2 ~ * cpe:/o:redhat:rhel_aus:8.2::baseos
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:3.3.3-1.el8_4.2 ~ * cpe:/o:redhat:rhel_aus:8.4::baseos
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:3.3.3-1.el8_4.2 ~ * cpe:/o:redhat:rhel_aus:8.4::baseos
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:3.3.3-6.el8_6.1 ~ * cpe:/o:redhat:rhel_aus:8.6::baseos
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:3.3.3-6.el8_6.1 ~ * cpe:/o:redhat:rhel_aus:8.6::baseos
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:3.3.3-6.el8_6.1 ~ * cpe:/o:redhat:rhel_aus:8.6::baseos
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:3.3.3-5.el8_8.2 ~ * cpe:/o:redhat:rhel_e4s:8.8::baseos
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:3.3.3-5.el8_8.2 ~ * cpe:/o:redhat:rhel_e4s:8.8::baseos
Red Hat Red Hat Enterprise Linux 9 0:3.5.3-9.el9_7 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9 0:3.5.3-9.el9_7 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:3.5.3-2.el9_0.4 ~ * cpe:/a:redhat:rhel_e4s:9.0::appstream
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:3.5.3-5.el9_2.2 ~ * cpe:/a:redhat:rhel_e4s:9.2::appstream
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:3.5.3-5.el9_4 ~ * cpe:/a:redhat:rhel_eus:9.4::appstream
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:3.5.3-7.el9_6.1 ~ * cpe:/a:redhat:rhel_eus:9.6::appstream
Red Hat Red Hat OpenShift Container Platform 4.12 412.86.202604281506-0 ~ * cpe:/a:redhat:openshift:4.12::el8
Red Hat Red Hat OpenShift Container Platform 4.13 413.92.202605271328-0 ~ * cpe:/a:redhat:openshift:4.13::el9
Red Hat Red Hat OpenShift Container Platform 4.14 414.92.202605060243-0 ~ * cpe:/a:redhat:openshift:4.14::el9
Red Hat Red Hat OpenShift Container Platform 4.15 415.92.202605060220-0 ~ * cpe:/a:redhat:openshift:4.15::el9
Red Hat Red Hat OpenShift Container Platform 4.16 416.94.202604211449-0 ~ * cpe:/a:redhat:openshift:4.16::el9
Red Hat Red Hat OpenShift Container Platform 4.17 417.94.202605112123-0 ~ * cpe:/a:redhat:openshift:4.17::el9
Red Hat Red Hat OpenShift Container Platform 4.18 418.94.202604240015-0 ~ * cpe:/a:redhat:openshift:4.18::el9
Red Hat Red Hat OpenShift Container Platform 4.19 4.19.9.6.202605201155-0 ~ * cpe:/a:redhat:openshift:4.19::el9
Red Hat RHEL-8 based Middleware Containers 7.13.5-4.1777325677 ~ * cpe:/a:redhat:rhosemc:1.0::el8
Red Hat RHEL-8 based Middleware Containers 7.13.5-4.1777325711 ~ * cpe:/a:redhat:rhosemc:1.0::el8
Red Hat RHEL-8 based Middleware Containers 7.13.5-4.1777325710 ~ * cpe:/a:redhat:rhosemc:1.0::el8
Red Hat RHEL-8 based Middleware Containers 7.13.5-3.1777325680 ~ * cpe:/a:redhat:rhosemc:1.0::el8

II. Public POCs for CVE-2026-4424

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9973 chars
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III. Intelligence Information for CVE-2026-4424

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Patches & Fixes for CVE-2026-4424 (1)

Vendor Advisories for CVE-2026-4424 (27)

Same Patch Batch · Red Hat · 2026-03-19 · 3 CVEs total

CVE-2026-4426 6.5 MEDIUM Libarchive: libarchive: denial of service via malformed iso file processing
CVE-2026-2369 6.5 MEDIUM Libsoup: libsoup: buffer overread due to integer underflow when handling zero-length resou

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-125

V. Comments for CVE-2026-4424

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