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CVE-2026-65065— Data::RoaringBitmap::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::RoaringBitmap::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::RoaringBitmap::Shared是EGOR的一个共享位图数据结构模块。 EGOR Data::RoaringBitmap::Shared 0.02之前版本存在安全漏洞，该漏洞源于创建全局可读的mmap支持文件且缺少O_EXCL和O_NOFOLLOW标记，可能导致本地用户读取IPC负载及攻击者利用预创建竞争或符号链接重定向打开操作。

AI Predicted 6.5 Difficulty: Easy EPSS 0.15% · P4 Updated Jul 27, 2026

Possible ATT&CK Techniques 2 AI

T1059 · Command and Scripting Interpreter T1557 · Adversary-in-the-Middle

Affected Version Matrix 1

Vendor	Product	Version Range	Status
EGOR	Data::RoaringBitmap::Shared	`< 0.02`	affected

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I. Basic Information for CVE-2026-65065

Vulnerability Information

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Vulnerability Title

Data::RoaringBitmap::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::RoaringBitmap::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 roaring.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::RoaringBitmap::Shared 后置链接漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

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::RoaringBitmap::Shared	0 ~ 0.02	-

II. Public POCs for CVE-2026-65065

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-65065

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Patches & Fixes for CVE-2026-65065 (1)

🔗 Changes - metacpan.org release-notes

Other References for CVE-2026-65065 (1)

https://metacpan.org/release/EGOR/Data-RoaringBitmap-Shared-0.02/diff/EGOR/Data-RoaringBitmap-Shared-0.01#roaring.h

https://www.cve.org/CVERecord?id=CVE-2026-65065

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-2026-65069		Data::DisjointSet::Shared versions before 0.02 for Perl create a world-readable mmap backi
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 → →

IV. Related Vulnerabilities

Same product: Data::RoaringBitmap::Shared

CVE-2026-59143
Data::RoaringBitmap::Shared versions before 0.02 for Perl al

Same vendor: EGOR

Same weakness: CWE-732