A critical integer overflow vulnerability (CVE-2026-5121) exists in libarchive's zisofs block pointer allocation logic on 32-bit systems. This flaw can be exploited remotely by providing a specially crafted ISO9660 image, potentially leading to a heap buffer overflow and arbitrary code execution. The vulnerability affects all versions of libarchive. Red Hat has issued security advisories and updates to address this issue in their Enterprise Linux 9 distribution.
CVE-2025-60753 is a medium severity vulnerability in libarchive's bsdtar utility prior to version 3.8.1. It arises from improper handling of crafted -s substitution rules in the apply_substitution function, leading to unbounded memory allocation. This flaw can cause an Out-of-Memory (OOM) crash, resulting in a denial of service. Exploitation requires local access and user interaction, with no impact on confidentiality or integrity. No known exploits are currently in the wild. European organizations using vulnerable versions of bsdtar, especially in environments processing untrusted tar archives, may face service disruptions. Mitigation involves updating to libarchive 3.8.
A vulnerability has been identified in the libarchive library, specifically within the archive_read_format_rar_seek_data() function. This flaw involves an integer overflow that can ultimately lead to a double-free condition. Exploiting a double-free vulnerability can result in memory corruption, enabling an attacker to execute arbitrary code or cause a denial-of-service condition.
A vulnerability has been identified in the libarchive library. This flaw can be triggered when file streams are piped into bsdtar, potentially allowing for reading past the end of the file. This out-of-bounds read can lead to unintended consequences, including unpredictable program behavior, memory corruption, or a denial-of-service condition.
A vulnerability has been identified in the libarchive library. This flaw involves an 'off-by-one' miscalculation when handling prefixes and suffixes for file names. This can lead to a 1-byte write overflow. While seemingly small, such an overflow can corrupt adjacent memory, leading to unpredictable program behavior, crashes, or in specific circumstances, could be leveraged as a building block for more sophisticated exploitation. This bug affects libarchive versions prior to 3.8.0.
A vulnerability has been identified in the libarchive library. This flaw involves an integer overflow that can be triggered when processing a Web Archive (WARC) file that claims to have more than INT64_MAX - 4 content bytes. An attacker could craft a malicious WARC archive to induce this overflow, potentially leading to unpredictable program behavior, memory corruption, or a denial-of-service condition within applications that process such archives using libarchive. This bug affects libarchive versions prior to 3.8.0.
A vulnerability has been identified in the libarchive library. This flaw can lead to a heap buffer over-read due to the size of a filter block potentially exceeding the Lempel-Ziv-Storer-Schieber (LZSS) window. This means the library may attempt to read beyond the allocated memory buffer, which can result in unpredictable program behavior, crashes (denial of service), or the disclosure of sensitive information from adjacent memory regions.
execute_filter_delta in archive_read_support_format_rar.c in libarchive before 3.7.5 allows out-of-bounds access via a crafted archive file because src can move beyond dst.