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TI-2024-37337 Aliases CVE-2024-56406GHSA-p6jf-pv8c-623c

Perl is vulnerable to a heap buffer overflow when transliterating non-ASCII bytes

Priority LOW 39CWE-122Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 1 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-122 and the CVSS impact.

Summary

A heap buffer overflow vulnerability was discovered in Perl. Release branches 5.34, 5.36, 5.38 and 5.40 are affected, including development versions from 5.33.1 through 5.41.10. When there are non-ASCII bytes in the left-hand-side of the `tr` operator, `S_do_trans_invmap` can overflow the destination pointer `d`.    $ perl -e '$_ = "\x{FF}" x 1000000; tr/\xFF/\x{100}/;'    Segmentation fault (core dumped) It is believed that this vulnerability can enable Denial of Service and possibly Code Execution attacks on platforms that lack sufficient defenses.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00536 45th percentileScored 2026-11-07
Fix Partial perl (perl): 5.40.2-RC1, 5.38.4-RC1Red Hat: 1 advisoryRed Hat: 1 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Perlperl5.41.0 – 5.41.10; 5.39.0 to before 5.40.2-RC1; 5.33.1 to before 5.38.4-RC15.40.2-RC1, 5.38.4-RC1Patch availableCNA
  • perl VendorPerl Affected 5.41.0 – 5.41.10; 5.39.0 to before 5.40.2-RC1; 5.33.1 to before 5.38.4-RC1 Fixed in 5.40.2-RC1, 5.38.4-RC1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:*5.33.1 to before 5.38.4; 5.39.0 to before 5.40.2; 5.41.0 – 5.41.10VulnerablePerl
  • cpe:2.3:a:perl:perl:*:*:*:*:*:*:*:* Versions 5.33.1 to before 5.38.4; 5.39.0 to before 5.40.2; 5.41.0 – 5.41.10 Vulnerable ·Perl

Remediation

  • Fix · CNA perl (perl) Fixed in 5.40.2-RC1, 5.38.4-RC1

Red Hat 1 advisory

  • RHSA-2025:7500 Released 2025-05-13 · Red Hat rating Important
    perl security update
    • Red Hat Enterprise Linux AppStream (v. 10) perl-4:5.40.2-512.1.el10_0, perl-Attribute-Handlers-1.03-512.1.el10_0, perl-AutoLoader-5.74-512.1.el10_0 +47

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:7500
Not affected: 3 products
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat OpenShift Container Platform 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-56406
  2. 2026-10-03 Alias added: GHSA-p6jf-pv8c-623c

References

Patch 1

Other 2

  • TI-2022-24100 In Perl 5.34.0, function S_find_uninit_var in sv.c has a stack-based crash that can lead… CVSS 3.1CRITICAL 9.8
  • TI-2012-05140 The _compile function in Maketext.pm in the Locale::Maketext implementation in Perl… CVSS 2.0HIGH 7.5
  • TI-2018-12932 Perl before 5.26.3 and 5.28.0 before 5.28.1 has a buffer overflow via a crafted regular… CVSS 3.0CRITICAL 9.8
  • TI-2018-12931 Perl before 5.26.3 and 5.28.x before 5.28.1 has a buffer overflow via a crafted regular… CVSS 3.0CRITICAL 9.8
  • TI-2018-05049 Heap-based buffer overflow in the pack function in Perl before 5.26.2 allows… CVSS 3.0CRITICAL 9.8
  • TI-2017-09493 Stack-based buffer overflow in the CPerlHost::Add method in win32/perlhost.h in Perl… CVSS 3.0CRITICAL 9.8
See all 45 →

Sources

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