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4 vulnerabilities found for Data::RingBuffer::Shared by EGOR
CVE-2026-65066 (GCVE-0-2026-65066)
Vulnerability from nvd – Published: 2026-07-21 19:09 – Updated: 2026-07-23 13:08
VLAI
EPSS
VEX
Title
Data::RingBuffer::Shared versions before 0.04 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW
Summary
Data::RingBuffer::Shared versions before 0.04 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW.
The segment is created in ring.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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| EGOR | Data::RingBuffer::Shared |
Affected:
0 , < 0.04
(custom)
|
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"packageName": "Data-RingBuffer-Shared",
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],
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}
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}
]
},
{
"descriptions": [
{
"cweId": "CWE-59",
"description": "CWE-59 Improper Link Resolution Before File Access",
"lang": "en",
"type": "CWE"
}
]
}
],
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"datePublished": "2026-07-21T19:09:03.992Z",
"dateReserved": "2026-07-21T15:29:37.116Z",
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"state": "PUBLISHED"
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"dataVersion": "5.2"
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CVE-2026-59144 (GCVE-0-2026-59144)
Vulnerability from nvd – Published: 2026-07-21 19:04 – Updated: 2026-07-22 19:33
VLAI
EPSS
VEX
Title
Data::RingBuffer::Shared versions before 0.04 for Perl allow a stack buffer overflow via an unvalidated elem_size in ring_read_seq
Summary
Data::RingBuffer::Shared versions before 0.04 for Perl allow a stack buffer overflow via an unvalidated elem_size in ring_read_seq.
The attach-time validator ring_validate_header checks the capacity-overflow and total_size consistency of the header but never caps elem_size against the destination size. ring_read_seq does memcpy(out, ring_slot(h, seq), elem_size) with elem_size read raw from the mmap'd segment, copying into a fixed 8-byte destination scalar. An elem_size larger than 8 bytes writes past the destination.
A local peer that can write the backing file can leave the header valid while setting a large elem_size, so the next read copies a file-controlled length into the fixed 8-byte stack buffer, corrupting adjacent stack frames.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| EGOR | Data::RingBuffer::Shared |
Affected:
0 , < 0.04
(custom)
|
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"confidentialityImpact": "HIGH",
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"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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},
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{
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"packageName": "Data-RingBuffer-Shared",
"product": "Data::RingBuffer::Shared",
"programFiles": [
"ring.h"
],
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{
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}
],
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"vendor": "EGOR",
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}
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},
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],
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}
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"discovery": "UNKNOWN"
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CVE-2026-65066 (GCVE-0-2026-65066)
Vulnerability from cvelistv5 – Published: 2026-07-21 19:09 – Updated: 2026-07-23 13:08
VLAI
EPSS
VEX
Title
Data::RingBuffer::Shared versions before 0.04 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW
Summary
Data::RingBuffer::Shared versions before 0.04 for Perl create a world-readable mmap backing file and open it without O_EXCL or O_NOFOLLOW.
The segment is created in ring.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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| EGOR | Data::RingBuffer::Shared |
Affected:
0 , < 0.04
(custom)
|
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"discovery": "UNKNOWN"
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CVE-2026-59144 (GCVE-0-2026-59144)
Vulnerability from cvelistv5 – Published: 2026-07-21 19:04 – Updated: 2026-07-22 19:33
VLAI
EPSS
VEX
Title
Data::RingBuffer::Shared versions before 0.04 for Perl allow a stack buffer overflow via an unvalidated elem_size in ring_read_seq
Summary
Data::RingBuffer::Shared versions before 0.04 for Perl allow a stack buffer overflow via an unvalidated elem_size in ring_read_seq.
The attach-time validator ring_validate_header checks the capacity-overflow and total_size consistency of the header but never caps elem_size against the destination size. ring_read_seq does memcpy(out, ring_slot(h, seq), elem_size) with elem_size read raw from the mmap'd segment, copying into a fixed 8-byte destination scalar. An elem_size larger than 8 bytes writes past the destination.
A local peer that can write the backing file can leave the header valid while setting a large elem_size, so the next read copies a file-controlled length into the fixed 8-byte stack buffer, corrupting adjacent stack frames.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| EGOR | Data::RingBuffer::Shared |
Affected:
0 , < 0.04
(custom)
|
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}
],
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}
],
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{
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"lang": "en",
"type": "CWE"
}
]
}
],
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{
"url": "https://metacpan.org/release/EGOR/Data-RingBuffer-Shared-0.04/diff/EGOR/Data-RingBuffer-Shared-0.03#ring.h"
},
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"release-notes"
],
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"datePublished": "2026-07-21T19:04:20.191Z",
"dateReserved": "2026-07-02T16:24:17.913Z",
"dateUpdated": "2026-07-22T19:33:34.869Z",
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},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}