A Denial of Service vulnerability (CVE-2026-9538, CVSS 7.5 HIGH) exists in the perl-Archive-Tar module where a crafted tar archive with a large entry size in its header can trigger the issue. The NVD data indicates versions of Archive::Tar prior to 3.10 are affected, and the fix is to upgrade to version 3.10.
Red Hat Product Errata RHSA-2026:49523 - Security Advisory Issued: 2026-08-03 Updated: 2026-08-03 RHSA-2026:49523 - Security Advisory Overview Updated Packages Synopsis Important: perl-Archive-Tar security update Type/Severity Security Advisory: Important Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. View affected systems Topic An update for perl-Archive-Tar is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Description Archive::Tar provides an object oriented mechanism for handling tar files. It provides class methods for quick and easy files handling while also allowing for the creation of tar file objects for custom manipulation. If you have the IO::Zlib module installed, Archive::Tar will also support compressed or gzipped tar files. Security Fix(es): perl-Archive-Tar: perl-Archive-Tar: Denial of Service via crafted tar header with large entry size (CVE-2026-9538) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Solution For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Affected Products Red Hat Enterprise Linux for x86_64 10 x86_64 Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.2 x86_64 Red Hat Enterprise Linux for IBM z Systems 10 s390x Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.2 s390x Red Hat Enterprise Linux for Power, little endian 10 ppc64le Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 ppc64le Red Hat Enterprise Linux for ARM 64 10 aarch64 Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.2 aarch64 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.2 aarch64 Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.2 s390x Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.2 ppc64le Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.2 x86_64 Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 10.2 x86_64 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 10.2 aarch64 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 10.2 ppc64le Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 10.2 s390x Fixes BZ - 2481315 - CVE-2026-9538 perl-Archive-Tar: perl-Archive-Tar: Denial of Service via crafted tar header with large entry size CVEs CVE-2026-9538 References https://access.redhat.com/security/updates/classification/#important Note: More recent versions of these packages may be available. Click a package name for more details. Red Hat Enterprise Linux for x86_64 10 SRPM perl-Archive-Tar-3.02-512.el10_2.2.src.rpm SHA-256: 57feaa926fdf4a220ce9297b5fa40c33fb527f19e8ec4400611dbf568339e3c1 x86_64 perl-Archive-Tar-3.02-512.el10_2.2.noarch.rpm SHA-256: 8497e29365dbedf9a15702a31fb26413c83484978eed5b236bad8de8eb392d25 Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.2 SRPM perl-Archive-Tar-3.02-512.el10_2.2.src.rpm SHA-256: 57feaa926fdf4a220ce9297b5fa40c33fb527f19e8ec4400611dbf568339e3c1 x86_64 perl-Archive-Tar-3.02-512.el10_2.2.noarch.rpm SHA-256: 8497e29365dbedf9a15702a31fb26413c83484978eed5b236bad8de8eb392d25 Red Hat Enterprise Linux for IBM z Systems 10 SRPM perl-Archive-Tar-3.02-512.el10_2.2.src.rpm SHA-256: 57feaa926fdf4a220ce9297b5fa40c33fb527f19e8ec4400611dbf568339e3c1 s390x perl-Archive-Tar-3.02-512.el10_2.2.noarch.rpm SHA-256: 8497e29365dbedf9a15702a31fb26413c83484978eed5b236bad8de8eb392d25 Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.2 SRPM perl-Archive-Tar-3.02-512.el10_2.2.src.rpm SHA-256: 57feaa926fdf4a220ce9297b5fa40c33fb527f19e8ec4400611dbf568339e3c1 s390x perl-Archive-Tar-3.02-512.el10_2.2.noarch.rpm SHA-256: 8497e29365dbedf9a15702a31fb26413c83484978eed5b236bad8de8eb392d25 Red Hat Enterprise Linux for Power, little endian 10 SRPM perl-Archive-Tar-3.02-512.el10_2.2.src.rpm SHA-256: 57feaa926fdf4a220ce9297b5fa40c33fb527f19e8ec4400611dbf568339e3c1 ppc64le perl-Archive-Tar-3.02-512.el10_2.2.noarch.rpm SHA-256: 8497e29365dbedf9a15702a31fb26413c83484978eed5b236bad8de8eb392d25 Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 SRPM perl-Archive-Tar-3.02-512.el10_2.2.src.rpm SHA-256: 57feaa926fdf4a220ce9297b5fa40c33fb527f19e8ec4400611dbf568339e3c1 ppc64le perl-Archive-Tar-3.02-512.el10_2.2.noarch.rpm SHA-256: 8497e29365dbedf9a15702a31fb26413c83484978eed5b236bad8de8eb392d25 Red Hat Enterprise Linux for ARM 64 10 SRPM perl-Archive-Tar-3.02-512.el10_2.2.src.rpm SHA-256: 57feaa926fdf4a220ce9297b5fa40c33fb527f19e8ec4400611dbf568339e3c1 aarch64 perl-Archive-Tar-3.02-512.el10_2.2.noarch.rpm SHA-256: 8497e29365dbedf9a15702a31fb26413c83484978eed5b236bad8de8eb392d25 Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.2 SRPM perl-Archive-Tar-3.02-512.el10_2.2.src.rpm SHA-256: 57feaa926fdf4a220ce9297b5fa40c33fb527f19e8ec4400611dbf568339e3c1 aarch64 perl-Archive-Tar-3.02-512.el10_2.2.noarch.rpm SHA-256: 8497e29365dbedf9a15702a31fb26413c83484978eed5b236bad8de8eb392d25 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.2 SRPM perl-Archive-Tar-3.02-512.el10_2.2.src.rpm SHA-256: 57feaa926fdf4a220ce9297b5fa40c33fb527f19e8ec4400611dbf568339e3c1 aarch64 perl-Archive-Tar-3.02-512.el10_2.2.noarch.rpm SHA-256: 8497e29365dbedf9a15702a31fb26413c83484978eed5b236bad8de8eb392d25 Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.2 SRPM perl-Archive-Tar-3.02-512.el10_2.2.src.rpm SHA-256: 57feaa926fdf4a220ce9297b5fa40c33fb527f19e8ec4400611dbf568339e3c1 s390x perl-Archive-Tar-3.02-512.el10_2.2.noarch.rpm SHA-256: 8497e29365dbedf9a15702a31fb26413c83484978eed5b236bad8de8eb392d25 Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.2 SRPM perl-Archive-Tar-3.02-512.el10_2.2.src.rpm SHA-256: 57feaa926fdf4a220ce9297b5fa40c33fb527f19e8ec4400611dbf568339e3c1 ppc64le perl-Archive-Tar-3.02-512.el10_2.2.noarch.rpm SHA-256: 8497e29365dbedf9a15702a31fb26413c83484978eed5b236bad8de8eb392d25 Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.2 SRPM perl-Archive-Tar-3.02-512.el10_2.2.src.rpm SHA-256: 57feaa926fdf4a220ce9297b5fa40c33fb527f19e8ec4400611dbf568339e3c1 x86_64 perl-Archive-Tar-3.02-512.el10_2.2.noarch.rpm SHA-256: 8497e29365dbedf9a15702a31fb26413c83484978eed5b236bad8de8eb392d25 Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 10.2 SRPM perl-Archive-Tar-3.02-512.el10_2.2.src.rpm SHA-256: 57feaa926fdf4a220ce9297b5fa40c33fb527f19e8ec4400611dbf568339e3c1 x86_64 perl-Archive-Tar-3.02-512.el10_2.2.noarch.rpm SHA-256: 8497e29365dbedf9a15702a31fb26413c83484978eed5b236bad8de8eb392d25 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 10.2 SRPM perl-Archive-Tar-3.02-512.el10_2.2.src.rpm SHA-256: 57feaa926fdf4a220ce9297b5fa40c33fb527f19e8ec4400611dbf568339e3c1 aarch64 perl-Archive-Tar-3.02-512.el10_2.2.noarch.rpm SHA-256: 8497e29365dbedf9a15702a31fb26413c83484978eed5b236bad8de8eb392d25 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 10.2 SRPM perl-Archive-Tar-3.02-512.el10_2.2.src.rpm SHA-256: 57feaa926fdf4a220ce9297b5fa40c33fb527f19e8ec4400611dbf568339e3c1 ppc64le perl-Archive-Tar-3.02-512.el10_2.2.noarch.rpm SHA-256: 8497e29365dbedf9a15702a31fb26413c83484978eed5b236bad8de8eb392d25 Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 10.2 SRPM perl-Archive-Tar-3.02-512.el10_2.2.src.rpm SHA-256: 57feaa926fdf4a220ce9297b5fa40c33fb527f19e8ec4400611dbf568339e3c1 s390x perl-Archive-Tar-3.02-512.el10_2.2.noarch.rpm SHA-256: 8497e29365dbedf9a15702a31fb26413c83484978eed5b236bad8de8eb392d25 The Red Hat security contact is secalert@redhat.com . More contact details at https://access.redhat.com/security/team/contact/ .