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Information Technology Laboratory
National Vulnerability Database
National Vulnerability Database
NVD
CVE-2026-48102 DetailDescription7-Zip is a file archiver with a high compression ratio. Versions 9.11 through 26.00 contain a heap out-of-bounds read of up to 3 bytes in the UDF disc image handler's File Identifier Descriptor parser. In CFileId::Parse (CPP/7zip/Archive/Udf/UdfIn.cpp), after validating size < 38 + idLen + impLen and advancing processed to 38 + impLen + idLen, the alignment-padding loop reads p[processed] while incrementing up to 3 times to reach a 4-byte boundary, and the processed <= size bounds check only runs after the loop. When (38 + impLen + idLen) % 4 != 0 and 38 + impLen + idLen == size, the loop reads 1 to 3 bytes past the end of the exact-size heap buffer allocated via buf.Alloc((size_t)item.Size). The UDF handler is registered for .iso and .udf files and auto-detected by signature, and the OOB read triggers during Open() when listing or extracting a crafted UDF image. Impact is limited to information disclosure (a 1-bit oracle per OOB byte via open/fail behavior) and denial of service (crash under hardened allocators); there is no write primitive. Version 26.01 fixes the issue. Metrics
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CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
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Weakness Enumeration
Known Affected Software Configurations Switch to CPE 2.2CPEs loading, please wait.
Denotes Vulnerable Software Change History6 change records found show changesCVE Modified by CISA-ADP 6/17/2026 6:54:51 AM
CVE Modified by GitHub, Inc. 6/17/2026 6:54:51 AM
Modified Analysis by NIST 6/10/2026 6:45:47 AM
CVE Modified by CISA-ADP 6/09/2026 12:16:42 PM
Initial Analysis by NIST 6/08/2026 9:43:21 AM
New CVE Received from GitHub, Inc. 6/05/2026 12:16:41 PM
Quick InfoCVE Dictionary Entry:CVE-2026-48102 NVD Published Date: 06/05/2026 NVD Last Modified: 06/17/2026 Source: GitHub, Inc. |
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