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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-65069— Data::DisjointSet::Shared versions before 0.02 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW

Quick assessment

Affected
EGOR Data::DisjointSet::Shared
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.

EGOR Data::DisjointSet::Shared是EGOR个人开发者的一个用于实现不相交集合数据结构共享的Perl模块。 EGOR Data::DisjointSet::Shared 0.02之前版本存在安全漏洞，该漏洞源于在dsu.h中创建全局可读的mmap支持文件时，未使用O_EXCL或O_NOFOLLOW标志，导致本地攻击者可利用符号链接重定向或预创建文件，从而读取共享目录中的IPC有效载荷或赢得预先创建竞争条件。

AI Predicted 7.8 Difficulty: Easy EPSS 0.17% · P6

Affected Version Matrix 1

VendorProduct Version RangeStatus
EGOR Data::DisjointSet::Shared < 0.02 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-65069

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Data::DisjointSet::Shared versions before 0.02 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW
Source: CVE Program / CVE List V5
Vulnerability Description
Data::DisjointSet::Shared versions before 0.02 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW. The segment is created in dsu.h with open(path, O_RDWR|O_CREAT, 0666). The mode is 0666, so under the default umask 022 the file is created mode 0644 (world-readable). O_NOFOLLOW is absent, so a symlink planted at the path is followed, and O_EXCL is absent, so the open silently uses a pre-planted file instead of failing. A "Shared" segment naturally lives in a shared directory such as /tmp or /dev/shm, where any local user can read the IPC payloads stored in the world-readable segment, and a pre-planted file or symlink at the path lets a local attacker win a pre-creation race or redirect the open.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
关键资源的不正确权限授予
Source: CVE Program / CVE List V5
Vulnerability Title
EGOR Data::DisjointSet::Shared 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
EGOR Data::DisjointSet::Shared是EGOR个人开发者的一个用于实现不相交集合数据结构共享的Perl模块。 EGOR Data::DisjointSet::Shared 0.02之前版本存在安全漏洞，该漏洞源于在dsu.h中创建全局可读的mmap支持文件时，未使用O_EXCL或O_NOFOLLOW标志，导致本地攻击者可利用符号链接重定向或预创建文件，从而读取共享目录中的IPC有效载荷或赢得预先创建竞争条件。
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
EGOR Data::DisjointSet::Shared 0 ~ 0.02 -

II. Public POCs for CVE-2026-65069

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-65069

请登录查看更多情报信息。

Other References for CVE-2026-65069 (1)

Other References for CVE-2026-65069 (1)

Same Patch Batch · EGOR · 2026-07-21 · 23 CVEs total

CVE-2026-59145 Data::Intern::Shared versions before 0.02 for Perl allow an out-of-bounds read via unvalid
CVE-2026-65068 Data::SpatialHash::Shared versions before 0.02 for Perl create a world-readable mmap backi
CVE-2026-65062 Data::SortedSet::Shared versions before 0.03 for Perl create a world-readable mmap backing
CVE-2026-65065 Data::RoaringBitmap::Shared versions before 0.02 for Perl create a world-readable mmap bac
CVE-2026-65066 Data::RingBuffer::Shared versions before 0.04 for Perl create a world-readable mmap backin
CVE-2026-65063 Data::RadixTree::Shared versions before 0.02 for Perl create a world-readable mmap backing
CVE-2026-65067 Data::Intern::Shared versions before 0.02 for Perl create a world-readable mmap backing fi
CVE-2026-65064 Data::HashMap::Shared versions before 0.14 for Perl create a world-readable mmap backing f
CVE-2026-65061 Data::ReqRep::Shared versions before 0.05 for Perl create a world-readable mmap backing fi
CVE-2026-59147 Data::DisjointSet::Shared versions before 0.02 for Perl allow out-of-bounds reads and writ
CVE-2026-59143 Data::RoaringBitmap::Shared versions before 0.02 for Perl allow an out-of-bounds read via
CVE-2026-59140 Data::SortedSet::Shared versions before 0.03 for Perl allow an out-of-bounds read via unva
CVE-2026-59146 Data::SpatialHash::Shared versions before 0.02 for Perl allow out-of-bounds reads and writ
CVE-2026-59144 Data::RingBuffer::Shared versions before 0.04 for Perl allow a stack buffer overflow via a
CVE-2026-64613 Data::Buffer::Shared versions before 0.05 for Perl create a world-readable mmap backing fi
CVE-2026-64617 Data::PubSub::Shared versions before 0.07 for Perl create a world-readable mmap backing fi
CVE-2026-64615 Data::Graph::Shared versions before 0.04 for Perl create a world-readable mmap backing fil
CVE-2026-64614 Data::Deque::Shared versions before 0.06 for Perl create a world-readable mmap backing fil
CVE-2026-64616 Data::NDArray::Shared versions before 0.02 for Perl create a world-readable mmap backing f
CVE-2026-59139 Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unva

Showing top 20 of 23 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Data::DisjointSet::Shared
Same vendor: EGOR
Same weakness: CWE-732