CVE-2026-103242

A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content — of attacker-chosen length — past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-103242
https://bugzilla.redhat.com/show_bug.cgi?id=2543866

Configurations

No configuration.

History

30 Sep 2026, 12:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-30 12:17

Updated : 2026-09-30 17:16

NVD link : CVE-2026-103242

Mitre link : CVE-2026-103242

CVE.ORG link : CVE-2026-103242

JSON object : View

Products Affected

No product.

CWE

CWE-122

Heap-based Buffer Overflow

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