Detections
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Echo: perl: security update to 5.40.1-6+e16

medium Tenable Cloud Security Plugin ID 459293

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Perl versions through 5.45.1 have out-of-bounds heap reads and writes during regular expression matching
 via an undersized superlinear cache in S_regmatch. The regex engine's superlinear cache holds one bit per
 subject position for each participating WHILEM node, so the bit count is the subject length plus one times
 the number of nodes. Nothing checks that product for positive overflow of the signed 32-bit count: a
 286331153 byte subject matched against a pattern with 15 participating nodes stores the count as 14,
 leaving a two byte cache. The cache is then indexed from the real match position and node number, so reads
 go past the end of the allocation, and on failure CACHEsayNO sets a bit past it. A caller that matches an
 attacker controlled subject of this size against a pattern of this shape can crash the process or corrupt
 heap memory. (CVE-2026-15534)

Solution

Update the perl library and its related packages to version 5.40.1-6+e16 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-15534

Plugin Details

Severity: Medium

ID: 459293

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 5.5

Percentile: 95.85

CVSS v2

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 3.5

Vector: CVSS2#AV:L/AC:H/Au:N/C:N/I:P/A:C

CVSS Score Source: CVE-2026-15534

CVSS v3

Risk Factor: Medium

Base Score: 5.7

Temporal Score: 5

Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 8/10/2026

Vulnerability Publication Date: 8/9/2026

Reference Information

CVE: CVE-2026-15534