Missing Release of Resource after Effective Lifetime Affecting perl-Tie-File package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.42% (35th percentile)

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  • Snyk IDSNYK-RHEL10-PERLTIEFILE-19638713
  • published7 Sept 2026
  • disclosed13 Aug 2026

Introduced: 13 Aug 2026

NewCVE-2026-19487  (opens in a new tab)
CWE-772  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:10 perl-Tie-File.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perl-Tie-File package and not the perl-Tie-File package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

Perl versions from 5.9.4 before 5.41.9 produce incorrect regular expression match results when a stale failure flag ends the Aho-Corasick prescan early in S_find_byclass.

The prescan walks the subject for positions where the full pattern could match, and the engine tries it from the leftmost one recorded. A failing transition sets the failed flag, and a later successful transition does not clear it, so the prescan reads the stale flag as a failure and stops before it can record a candidate that starts earlier. It takes a subject where one candidate is recorded and a later character then forces a fallback through a fail link that succeeds.

Example:

"ABCDE" =~ m/ABCF|BCDE|C/; # matches C at offset 2, not BCDE "ABCDE" =~ m/ABCF|BCDE|C(G)/; # no match, BCDE missed

An alternation like this can miss input it should match, or match it on the wrong branch, so an access or filtering decision made from the result can be wrong.

CVSS Base Scores

version 3.1