Bug#1138861: Archive-Tar: CVE-2026-9538

[Niko Tyni]

Package: perl
Version: 5.40.1-6
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil at debian.org
Forwarded: https://github.com/jib/archive-tar-new/commit/f9af01426038e29d9578825a0cd3626946ab08c7
Control: found -1 5.32.1-4
Control: found -1 5.36.0-1
Control: found -1 5.42.2-1

The following vulnerability was published[0] for Archive-Tar (bundled with perl):


  CVE ID:  CVE-2026-9538
  Distribution:  Archive-Tar
  Versions:  before 3.10

  MetaCPAN:  https://metacpan.org/dist/Archive-Tar
  VCS Repo:  https://github.com/jib/archive-tar-new

  Archive::Tar versions before 3.10 for Perl allow memory exhaustion via
  attacker controlled entry size field in tar header
  
  Description
  -----------
  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.
  
[0] https://lists.security.metacpan.org/cve-announce/msg/40396448/

-- 
Niko Tyni       ntyni at debian.org