Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Perl | Perl | >= 5.33.1, < 5.38.4 |
Related Weaknesses (CWE)
References
- https://github.com/Perl/perl5/commit/87f42aa0e0096e9a346c9672aa3a0bd3bef8c1dd.paPatch
- https://metacpan.org/release/SHAY/perl-5.38.4/changesRelease Notes
- https://metacpan.org/release/SHAY/perl-5.40.2/changesRelease Notes
- http://www.openwall.com/lists/oss-security/2025/04/13/3Mailing List
- http://www.openwall.com/lists/oss-security/2025/04/13/4Mailing List
- http://www.openwall.com/lists/oss-security/2025/04/13/5Mailing List
FAQ
What is CVE-2024-56406?
CVE-2024-56406 is a vulnerability with a CVSS score of 8.4 (HIGH). 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-...
How severe is CVE-2024-56406?
CVE-2024-56406 has been rated HIGH with a CVSS base score of 8.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-56406?
Check the references section above for vendor advisories and patch information. Affected products include: Perl Perl.