Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-15534— 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

Quick assessment

Affected
CVE-2026-15534
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Perl是Perl组织开源的一款通用、解释型、动态的跨平台编程语言。 perl 5.45.1及之前版本存在安全漏洞，该漏洞源于S_regmatch中正则表达式匹配期间超线性缓存不足，导致越界堆读取和写入，可能导致进程崩溃或堆内存损坏。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
None None ≤ 5.45.1 affected

I. Basic Information for CVE-2026-15534

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
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
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
perl 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Perl是Perl组织开源的一款通用、解释型、动态的跨平台编程语言。 perl 5.45.1及之前版本存在安全漏洞，该漏洞源于S_regmatch中正则表达式匹配期间超线性缓存不足，导致越界堆读取和写入，可能导致进程崩溃或堆内存损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- - 0 ~ 5.45.1 -

II. Public POCs for CVE-2026-15534

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-15534

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-15534 (2)

IV. Related Vulnerabilities

Same weakness: CWE-190

V. Comments for CVE-2026-15534

No comments yet

Leave a comment