Upstream information

CVE-2026-5089 at MITRE

Description

YAML::Syck versions before 1.38 for Perl has an out-of-bounds read.

The base60 (sexagesimal) parsing code in perl_syck.h has a buffer underflow bug in both int#base60 and float#base60 handlers. When processing the leftmost segment of a colon-separated value (e.g., the 1 in 1:30:45), the inner while loop can decrement a pointer past the start of the string buffer:

while ( colon >= ptr && *colon != ':' )
{
colon--;
}
if ( *colon == ':' ) *colon = '\0'; // colon may be ptr-1 here

When no colon is found (final/leftmost segment), colon becomes ptr-1, and the subsequent *colon dereference reads one byte before the allocated buffer.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail CNA (CISA-ADP)
Base Score 7.3
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact Low
Integrity Impact Low
Availability Impact Low
CVSSv3 Version 3.1
SUSE Bugzilla entry: 1265155 [RESOLVED / FIXED]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
SUSE Package Hub 15 SP7
  • perl-YAML-Syck >= 1.470.0-bp157.2.6.1
 Patchnames:
openSUSE-2026-273
openSUSE Leap 16.0
  • perl-YAML-Syck >= 1.450.0-bp160.2.1
 Patchnames:
openSUSE-Leap-16.0-packagehub-306
openSUSE Tumbleweed
  • perl-YAML-Syck >= 1.450.0-4.1
 Patchnames:
openSUSE-Tumbleweed-2026-10846

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Package Hub 15 SP7 perl-YAML-Syck Released

SUSE Timeline for this CVE

CVE page created: Tue May 12 19:52:19 2026
CVE page last modified: Tue Aug 4 17:24:52 2026