An update for libarchive is now available for openEuler-24.03-LTS-SP3 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-1945 Final 1.0 1.0 2026-04-17 Initial 2026-04-17 2026-04-17 openEuler SA Tool V1.0 2026-04-17 libarchive security update An update for libarchive is now available for openEuler-24.03-LTS-SP3 is an open-source BSD-licensed C programming library that provides streaming access to a variety of different archive formats, including tar, cpio, pax, zip, and ISO9660 images. The distribution also includes bsdtar and bsdcpio, full-featured implementations of tar and cpio that use . Security Fix(es): 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.(CVE-2026-4424) A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field (`pz_log2_bs`) read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to incorrect memory allocation and potential application crashes, resulting in a denial-of-service (DoS) condition.(CVE-2026-4426) A flaw was found in libarchive. On 32-bit systems, an integer overflow vulnerability exists in the zisofs block pointer allocation logic. A remote attacker can exploit this by providing a specially crafted ISO9660 image, which can lead to a heap buffer overflow. This could potentially allow for arbitrary code execution on the affected system.(CVE-2026-5121) An update for libarchive is now available for openEuler-24.03-LTS-SP3. openEuler Security has rated this update as having a security impact of critical. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. Critical libarchive https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1945 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-4424 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-4426 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-5121 https://nvd.nist.gov/vuln/detail/CVE-2026-4424 https://nvd.nist.gov/vuln/detail/CVE-2026-4426 https://nvd.nist.gov/vuln/detail/CVE-2026-5121 openEuler-24.03-LTS-SP3 libarchive-help-3.7.1-11.oe2403sp3.noarch.rpm bsdcat-3.7.1-11.oe2403sp3.aarch64.rpm bsdcpio-3.7.1-11.oe2403sp3.aarch64.rpm bsdtar-3.7.1-11.oe2403sp3.aarch64.rpm bsdunzip-3.7.1-11.oe2403sp3.aarch64.rpm libarchive-3.7.1-11.oe2403sp3.aarch64.rpm libarchive-debuginfo-3.7.1-11.oe2403sp3.aarch64.rpm libarchive-debugsource-3.7.1-11.oe2403sp3.aarch64.rpm libarchive-devel-3.7.1-11.oe2403sp3.aarch64.rpm bsdcat-3.7.1-11.oe2403sp3.x86_64.rpm bsdcpio-3.7.1-11.oe2403sp3.x86_64.rpm bsdtar-3.7.1-11.oe2403sp3.x86_64.rpm bsdunzip-3.7.1-11.oe2403sp3.x86_64.rpm libarchive-3.7.1-11.oe2403sp3.x86_64.rpm libarchive-debuginfo-3.7.1-11.oe2403sp3.x86_64.rpm libarchive-debugsource-3.7.1-11.oe2403sp3.x86_64.rpm libarchive-devel-3.7.1-11.oe2403sp3.x86_64.rpm libarchive-3.7.1-11.oe2403sp3.src.rpm 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. 2026-04-17 CVE-2026-4424 openEuler-24.03-LTS-SP3 High 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N libarchive security update 2026-04-17 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1945 A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field (`pz_log2_bs`) read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to incorrect memory allocation and potential application crashes, resulting in a denial-of-service (DoS) condition. 2026-04-17 CVE-2026-4426 openEuler-24.03-LTS-SP3 Medium 6.5 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H libarchive security update 2026-04-17 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1945 A flaw was found in libarchive. On 32-bit systems, an integer overflow vulnerability exists in the zisofs block pointer allocation logic. A remote attacker can exploit this by providing a specially crafted ISO9660 image, which can lead to a heap buffer overflow. This could potentially allow for arbitrary code execution on the affected system. 2026-04-17 CVE-2026-5121 openEuler-24.03-LTS-SP3 Critical 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H libarchive security update 2026-04-17 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1945