CVE-2026-12087
Essential information
- Published
- 16/06/2026 00:16
- Modified
- 16/06/2026 17:16
- Author
- The MITRE Corporation
- Creator
- The MITRE Corporation
- CVSS
- 9.1 CRITICAL (v3.1)
- CISA KEV
- No
- CWE
- CWE-125
- EPSS (First)
- P8.3% EPSS percentile: rank of this vulnerability versus all others. Higher percentile = more likely to be exploited. Learn more (score 0.00186)
- CVSS vector
-
—
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H—
CVSS metrics
- Access vector
- —
- Access complexity
- —
- Authentication
- —
- Confidentiality impact
- —
- Integrity impact
- —
- Availability impact
- —
- Exploitability
- —
- Remediation level
- —
- Report confidence
- —
- Temporal score
- —
- Attack vector
- NETWORK
- Attack complexity
- LOW
- Privileges required
- NONE
- User interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality impact
- HIGH
- Integrity impact
- NONE
- Availability impact
- HIGH
- Exploit code maturity
- —
- Remediation level
- —
- Report confidence
- —
- Temporal score
- —
- Attack vector
- —
- Attack complexity
- —
- Attack requirements
- —
- Privileges required
- —
- User interaction
- —
- Confidentiality (V)
- —
- Confidentiality (S)
- —
- Integrity (V)
- —
- Integrity (S)
- —
- Availability (V)
- —
- Availability (S)
- —
- Exploit maturity
- —
Description
Socket versions before 2.041 for Perl have an out-of-bounds heap read.
In Socket.xs, pack_ip_mreq_source() checks the length of its source argument before the argument is read, so the check tests the byte length carried over from the preceding multiaddr argument instead. Both addresses occupy a 4-byte field, so a valid multiaddr lets a source of any length pass the check, and the source is then copied into the 4-byte imr_sourceaddr field with a fixed-size copy. A source shorter than 4 bytes is not rejected, and the copy reads up to 3 bytes past the end of its buffer.
Calling pack_ip_mreq_source() with a source value shorter than 4 bytes copies adjacent heap memory into the returned packed structure.
NVD status
- Status
- Deferred — CVE has been recently published to the CVE List and has been received by the NVD.
- Source
- 9b29abf9-4ab0-4765-b253-1875cd9b441e
- NVD
- View on NVD
Affected products (CPE)
| Product | CPE |
|---|---|
| perl / socket | cpe:2.3:a:perl:socket:<2.041:*:*:*:*:*:*:* |