Bug 2481315 (CVE-2026-9538) - CVE-2026-9538 perl-Archive-Tar: perl-Archive-Tar: Denial of Service via crafted tar header with large entry size
Summary: CVE-2026-9538 perl-Archive-Tar: perl-Archive-Tar: Denial of Service via craft...
Keywords:
Status: NEW
Alias: CVE-2026-9538
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2496665
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-26 02:01 UTC by OSIDB Bzimport
Modified: 2026-08-03 04:11 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:48225 0 None None None 2026-07-29 23:07:32 UTC
Red Hat Product Errata RHSA-2026:49523 0 None None None 2026-08-03 04:11:38 UTC
Red Hat Product Errata RHSA-2026:49524 0 None None None 2026-08-03 03:06:45 UTC
Red Hat Product Errata RHSA-2026:49525 0 None None None 2026-08-03 03:53:45 UTC

Description OSIDB Bzimport 2026-05-26 02:01:17 UTC 
Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header.

_read_tar() reads each entry's payload with $handle->read($$data, $block), where $block is derived from the entry's 12-byte size field in the tar header with no upper bound on that value.

A crafted header declaring a multi-gigabyte size causes Perl to allocate a scalar of that size.
Comment 3 errata-xmlrpc 2026-07-29 23:07:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:48225 https://access.redhat.com/errata/RHSA-2026:48225
Comment 4 errata-xmlrpc 2026-08-03 03:06:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:49524 https://access.redhat.com/errata/RHSA-2026:49524
Comment 5 errata-xmlrpc 2026-08-03 03:53:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:49525 https://access.redhat.com/errata/RHSA-2026:49525
Comment 6 errata-xmlrpc 2026-08-03 04:11:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:49523 https://access.redhat.com/errata/RHSA-2026:49523
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